that_o i_o shall_v prove_v be_v that_o the_o gradual_a heat_n and_o cool_v of_o these_o so_o extend_a body_n do_v reduce_v the_o part_n of_o the_o glass_n to_o a_o loose_a and_o soft_a temper_n and_o this_o i_o find_v by_o heat_a they_o and_o keep_v they_o for_o a_o pretty_a while_n very_o red_a hot_a in_o a_o fire_n for_o thereby_o i_o find_v they_o to_o grow_v a_o little_o light_a and_o the_o small_a stem_n to_o be_v very_o easy_o break_v and_o snap_v any_o where_o without_o at_o all_o make_v the_o drop_n fly_v whereas_o before_o they_o be_v so_o exceed_o hard_a that_o they_o can_v not_o be_v break_v without_o much_o difficulty_n and_o upon_o their_o break_v the_o whole_a drop_n will_v fly_v in_o piece_n with_o very_o great_a violence_n the_o reason_n of_o which_o last_o seem_v to_o be_v that_o the_o leisurely_o heat_n and_o cool_v of_o the_o part_n do_v not_o only_o waste_v some_o part_n of_o the_o glass_n itself_o but_o range_v all_o the_o part_n into_o a_o better_a order_n and_o 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they_o through_o the_o flame_n of_o a_o candle_n i_o observe_v where_o some_o conspicuous_a shine_a particle_n fall_v and_o look_v on_o they_o with_o my_o microscope_n i_o find_v they_o to_o be_v nothing_o else_o but_o such_o round_a globule_n as_o i_o former_o find_v the_o spark_n strike_v from_o the_o steel_n by_o a_o stroke_n to_o be_v only_o a_o little_o big_a and_o shake_v together_o all_o the_o file_n that_o have_v fall_v upon_o the_o sheet_n of_o paper_n underneath_o and_o observe_v they_o with_o the_o microscope_n i_o find_v a_o great_a number_n of_o small_a globule_n such_o as_o the_o former_a though_o there_o be_v also_o many_o of_o the_o part_n that_o have_v remain_v untouched_a and_o rough_a file_n or_o chip_n of_o iron_n so_o that_o it_o seem_v iron_n do_v contain_v a_o very_a combustible_a sulphureous_a body_n which_o be_v in_o all_o likelihood_n one_o of_o the_o cause_n of_o this_o phaenomenon_n and_o which_o may_v be_v perhaps_o very_o much_o concern_v in_o the_o business_n of_o its_o harden_v and_o temper_v of_o which_o somewhat_o be_v say_v in_o the_o description_n of_o muscovy-glass_n so_o that_o these_o thing_n consider_v we_o need_v not_o trouble_v ourselves_o to_o find_v out_o what_o kind_n of_o pore_n they_o be_v both_o in_o the_o flint_n and_o steel_n that_o contain_v the_o atom_n of_o fire_n nor_o how_o those_o atom_n come_v to_o be_v hinder_v from_o run_v all_o out_o when_o a_o door_n or_o passage_n in_o their_o pore_n be_v make_v by_o the_o concussion_n nor_o need_v we_o trouble_v ourselves_o to_o examine_v by_o what_o prometheus_n the_o element_n of_o fire_n come_v to_o be_v fetch_v down_o from_o above_o the_o region_n of_o the_o air_n in_o what_o cell_n or_o box_n it_o be_v keep_v and_o what_o epimetheus_n let_v it_o go_v nor_o to_o consider_v what_o it_o be_v that_o cause_n so_o great_a a_o conflux_n of_o the_o atomical_a particle_n of_o fire_n which_o be_v say_v to_o fly_v to_o a_o flame_a body_n like_o vulture_n or_o eagle_n to_o a_o putrify_a carcase_n and_o there_o to_o make_v a_o very_a great_a pother_n since_o we_o have_v nothing_o more_o difficult_a in_o this_o hypothesis_n to_o conceive_v first_o as_o to_o the_o kindle_v of_o tinder_n then_o how_o a_o large_a iron-bullet_n let_v fall_v red_a or_o glow_a hot_a upon_o a_o heap_n of_o small-coal_n shall_v set_v fire_n to_o those_o that_o be_v next_o to_o it_o first_o nor_o second_o be_v this_o last_o more_o difficult_a to_o be_v explicate_v then_o that_o a_o body_n as_o silver_n for_o instance_n put_v into_o a_o weak_a menstruum_fw-la as_o unrectify_v aqua_fw-la fortis_fw-la shall_v when_o it_o be_v put_v in_o a_o great_a heat_n be_v there_o dissolve_v by_o it_o and_o not_o before_o which_o
the_o water_n can_v very_o little_a or_o not_o at_o all_o penetrate_v this_o therefore_o retain_v always_o very_a near_o the_o same_o dimension_n and_o the_o other_o stretch_v and_o shrink_v according_a as_o there_o be_v more_o or_o less_o moisture_n or_o water_n in_o its_o pore_n by_o reason_n of_o the_o make_v and_o shape_n of_o the_o part_n the_o whole_a body_n must_v necessary_o unwreath_v and_o wreathe_v itself_o and_o upon_o this_o principle_n it_o be_v very_o easy_a to_o make_v several_a sort_n of_o contrivance_n that_o shall_v thus_o wreathe_v and_o unwreath_v themselves_o either_o by_o heat_n and_o cold_a or_o by_o dryness_n and_o moisture_n or_o by_o any_o great_a or_o less_o force_v from_o whatever_o cause_n it_o proceed_v whether_o from_o gravity_n or_o weight_n or_o from_o wind_n which_o be_v motion_n of_o the_o air_n or_o from_o some_o spring_a body_n or_o the_o like_a this_o have_v i_o time_n i_o shall_v enlarge_v much_o more_o upon_o for_o it_o seem_v to_o i_o to_o be_v the_o very_a first_o footstep_n of_o sensation_n and_o animate_v motion_n the_o most_o plain_a simple_a and_o obvious_a contrivance_n that_o nature_n have_v make_v use_n of_o to_o produce_v a_o motion_n next_o to_o that_o of_o rarefaction_n and_o condensation_n by_o heat_n and_o cold_a and_o be_v this_o principle_n very_o well_o examine_v i_o be_o very_o apt_a to_o think_v it_o will_v afford_v we_o a_o very_a great_a help_n to_o find_v out_o the_o mechanism_n of_o the_o muscle_n which_o indeed_o as_o far_o as_o i_o have_v hitherto_o be_v able_a to_o examine_v seem_v to_o i_o not_o so_o very_o perplex_v as_o one_o may_v imagine_v especial_o upon_o the_o examination_n which_o i_o make_v of_o the_o muscle_n of_o crab_n lobster_n and_o several_a sort_n of_o large_a shellfish_n and_o compare_v my_o observation_n on_o they_o with_o the_o circumstance_n i_o observe_v in_o the_o muscle_n of_o terrestrial_a animal_n now_o as_o in_o this_o instance_n of_o the_o beard_n of_o a_o wild_a oat_n we_o 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by_o the_o influx_n and_o evaporation_n of_o some_o kind_n of_o liquor_n or_o juice_n but_o of_o this_o enquiry_n i_o shall_v add_v more_o elsewhere_o obseru._n xxviii_o of_o the_o seed_n of_o venus_n looking-glass_n or_o corn_n violet_n from_o the_o leave_n and_o down_n and_o beard_n of_o plant_n we_o come_v at_o last_o to_o the_o seed_n and_o here_o indeed_o seem_v to_o be_v the_o cabinet_n of_o nature_n wherein_o be_v lay_v up_o its_o jewel_n the_o providence_n of_o nature_n about_o vegetable_n be_v in_o no_o part_n manifest_v more_o then_o in_o the_o various_a contrivance_n about_o the_o seed_n nor_o indeed_o be_v there_o in_o any_o part_n of_o the_o vegetable_a so_o curious_a carving_n and_o beautiful_a adornment_n as_o about_o the_o seed_n this_o in_o the_o large_a sort_n of_o seed_n be_v most_o evident_a to_o the_o eye_n nor_o be_v it_o less_o manifest_a through_o the_o microscope_n in_o those_o seed_n who_o shape_n and_o structure_n by_o reason_n of_o their_o smallness_n the_o eye_n be_v hardly_o able_a to_o distinguish_v of_o these_o there_o be_v multitude_n many_o of_o which_o i_o have_v observe_v through_o a_o microscope_n and_o find_v that_o they_o do_v for_o the_o most_o part_n every_o one_o afford_v exceed_v pleasant_a and_o beautiful_a object_n for_o beside_o those_o that_o have_v various_a kind_n of_o carve_v surface_n there_o be_v other_o that_o have_v smooth_a and_o perfect_o polish_a surface_n other_o a_o downy_a hairy_a surface_n some_o be_v cover_v only_o with_o a_o skin_n other_o with_o a_o kind_n of_o shell_n other_o with_o both_o as_o be_v observable_a also_o in_o great_a seed_n schem_n xvii_o schem_n xviii_o this_o though_o it_o appear_v one_o of_o the_o most_o promise_a seed_n for_o beauty_n to_o the_o naked_a eye_n yet_o through_o the_o microscope_n it_o appear_v but_o a_o rude_a misshape_a seed_n which_o i_o therefore_o draw_v that_o i_o may_v thereby_o manifest_v how_o unable_a we_o be_v by_o the_o naked_a eye_n to_o judge_v of_o beauteous_a or_o less_o curious_a microscopical_a object_n cut_v some_o of_o they_o in_o sunder_o i_o observe_v they_o to_o be_v fill_v with_o a_o greenish_a yellow_a pulp_n and_o to_o have_v a_o very_a thick_a husk_n in_o proportion_n to_o the_o pulp_n obseru._n xxix_o of_o the_o seed_n of_o time_n these_o pretty_a fruit_n here_o represent_v in_o the_o 18._o scheme_n be_v nothing_o else_o but_o nine_o several_a seed_n of_o time_n they_o be_v all_o of_o they_o in_o differ_v posture_n both_o as_o to_o the_o eye_n and_o the_o light_n nor_o be_v they_o all_o of_o they_o exact_o of_o the_o same_o shape_n there_o be_v a_o great_a variety_n both_o in_o the_o bulk_n and_o figure_n of_o each_o seed_n but_o they_o all_o agree_v in_o this_o that_o be_v look_v on_o with_o a_o microscope_n they_o each_o of_o they_o exact_o resemble_v a_o lemon_n or_o orange_n dry_v and_o this_o both_o in_o shape_n and_o colour_n some_o of_o they_o be_v a_o little_o round_a of_o the_o shape_n of_o a_o orange_n as_o a_o and_o b_o they_o have_v each_o of_o they_o a_o very_a conspicuous_a part_n by_o which_o they_o be_v join_v to_o their_o little_a stalk_n and_o one_o of_o they_o have_v a_o little_a piece_n of_o stalk_n remain_v on_o the_o opposite_a side_n of_o the_o seed_n you_o may_v perceive_v very_o plain_o by_o the_o figure_n be_v very_o cop_v and_o prominent_a as_o be_v very_o usual_a in_o lemon_n which_o prominency_n be_v express_v in_o d_o e_z and_o f._n they_o seem_v each_o of_o they_o a_o little_a crease_v or_o wrinkle_a but_o e_z be_v very_o conspicuous_o furrow_v as_o if_o the_o inward_a make_v of_o this_o seed_n have_v be_v somewhat_o like_o that_o of_o a_o lemon_n also_o but_o upon_o divide_v several_a seed_n with_o a_o very_a sharp_a penknife_n and_o examine_v they_o afterward_o i_o find_v their_o make_n to_o be_v in_o nothing_o but_o bulk_n differ_v from_o that_o of_o pea_n that_o be_v to_o have_v a_o pretty_a thick_a coat_n and_o all_o the_o rest_n a_o indifferent_a white_a pulp_n which_o seem_v very_o close_o so_o that_o it_o seem_v nature_n do_v not_o very_o much_o alter_v her_o method_n in_o the_o manner_n of_o enclose_v and_o preserve_v the_o vital_a principle_n in_o the_o seed_n in_o these_o very_a small_a grain_n from_o that_o of_o bean_n pea_n etc._n etc._n the_o grain_n afford_v a_o very_a pretty_a object_n for_o the_o microscope_n namely_o a_o dish_n of_o lemon_n place_v in_o a_o very_a little_a room_n shall_v a_o lemon_n or_o nut_n be_v proportionable_o magnify_v to_o what_o this_o seed_n of_o time_n be_v it_o will_v make_v it_o appear_v as_o big_a as_o a_o large_a hay-teek_a and_o it_o will_v be_v no_o great_a wonder_n to_o see_v homer_n iliad_n and_o homer_n and_o all_o cram_v into_o such_o a_o nutshell_n we_o may_v perceive_v even_o in_o these_o small_a grain_n as_o well_o as_o in_o great_a how_o curious_a and_o careful_a nature_n be_v in_o preserve_v the_o seminal_a principle_n of_o vegetable_a body_n in_o what_o delicate_a strong_a and_o most_o 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fluid_fw-la to_o it_o we_o be_v to_o consider_v also_o the_o congruity_n of_o the_o part_n of_o the_o contain_v fluid_a one_o with_o another_o and_o this_o congruity_n that_o i_o may_v here_o a_o little_a further_o explain_v it_o be_v both_o a_o tenaceous_a and_o a_o attractive_a power_n for_o the_o congruity_n in_o the_o vibrative_a motion_n may_v be_v the_o cause_n of_o all_o kind_n of_o attraction_n not_o only_o electrical_a but_o magnetical_a also_o and_o therefore_o it_o may_v be_v also_o of_o tenacity_n and_o glutinousness_n for_o from_o a_o perfect_a congruity_n of_o the_o motion_n of_o two_o distant_a body_n the_o intermediate_v fluid_a particle_n be_v separate_v and_o drive_v away_o from_o between_o they_o and_o thereby_o those_o congruous_a body_n be_v by_o the_o encompass_v medium_n compel_v and_o force_v near_o together_o wherefore_o that_o attractiveness_n must_v needs_o be_v strong_a when_o by_o a_o immediate_a contact_n they_o be_v force_v to_o be_v exact_o the_o same_o 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the_o more_o like_o the_o impression_n on_o f_o and_o d_o by_o how_o much_o the_o near_o they_o approach_v that_o or_o this_o from_o the_o consideration_n of_o the_o propriety_n of_o which_o impression_n we_o may_v collect_v these_o short_a definition_n of_o colour_n that_o blue_n be_v a_o impression_n on_o the_o retina_fw-la of_o a_o oblique_a and_o confuse_a pulse_n of_o light_n who_o weak_a part_n precede_v and_o who_o strong_a follow_v and_o that_o red_a be_v a_o impression_n on_o the_o retina_fw-la of_o a_o oblique_a and_o confuse_a pulse_n of_o light_n who_o strong_a part_n precede_v and_o who_o weak_a follow_v which_o propriety_n as_o they_o have_v be_v already_o manifest_v in_o the_o prism_n and_o fall_a drop_n of_o rain_n to_o be_v the_o cause_n of_o the_o colour_n there_o generate_v may_v be_v easy_o find_v to_o be_v the_o efficient_n also_o of_o the_o colour_n appear_v in_o thin_a laminated_a transparent_a body_n for_o the_o explication_n of_o which_o all_o this_o have_v 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therefore_o be_v reflect_v back_o by_o cghd_v the_o first_o superficies_n whereby_o the_o perpendicular_a pulse_n ab_fw-la be_v after_o reflection_n propagate_v by_o cd_o cd_o equal_o remote_a from_o each_o other_o with_o ab_fw-la ab_fw-la so_o that_o ag_fw-mi +_o gc_fw-la or_o bh_v +_o hd_a be_v either_o of_o they_o equal_a to_o aa_n as_o be_v also_o cc_o but_o the_o body_n bae_n be_v transparent_a a_o part_n of_o the_o light_n of_o this_o ray_n be_v refract_v in_o the_o surface_n ab_fw-la and_o propagate_v by_o gikh_n to_o the_o surface_n of_o whence_o it_o be_v reflect_v and_o refract_v again_o by_o the_o surface_n ab_fw-la so_o that_o after_o two_o refraction_n and_o one_o reflection_n there_o be_v propagate_v a_o kind_n of_o faint_a ray_n emnf_o who_o pulse_n be_v not_o only_o weak_a by_o reason_n of_o the_o two_o refraction_n in_o the_o surface_n ab_fw-la but_o by_o reason_n of_o the_o time_n spend_v in_o pass_v and_o repass_v between_o the_o two_o surface_n ab_fw-la and_o of_o 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there_o very_a much_o condense_v and_o consequent_o press_v very_o strong_o to_o get_v a_o passage_n out_o without_o suffer_v the_o least_o bubble_n to_o pass_v through_o its_o substance_n for_o as_o to_o the_o first_o since_o our_o microscope_n inform_v we_o that_o the_o substance_n of_o cork_n be_v altogether_o fill_v with_o air_n and_o that_o that_o air_n be_v perfect_o enclose_v in_o little_a box_n or_o cell_n distinct_a from_o one_o another_o it_o seem_v very_o plain_a why_o neither_o the_o water_n nor_o any_o other_o air_n can_v easy_o insinuate_v itself_o into_o they_o since_o there_o be_v already_o within_o they_o a_o intus_fw-la existens_fw-la and_o consequent_o why_o the_o piece_n of_o cork_n become_v so_o good_a float_n for_o net_n and_o stopple_v for_o viol_n or_o other_o close_a vessel_n and_o three_o if_o we_o inquire_v why_o cork_n have_v such_o a_o springiness_n and_o swell_a nature_n whem_o compress_v and_o how_o it_o come_v to_o suffer_v so_o great_a a_o compression_n or_o seem_a penetration_n of_o dimension_n so_o as_o to_o be_v make_v a_o substance_n as_o heavy_a again_o and_o more_o bulk_n for_o bulk_n as_o it_o be_v before_o compression_n and_o yet_o suffer_v to_o return_v be_v find_v to_o extend_v itself_o again_o into_o the_o same_o space_n our_o microscope_n will_v easy_o inform_v we_o that_o the_o whole_a mass_n consist_v of_o a_o infinite_a company_n of_o small_a box_n or_o bladder_n of_o air_n which_o be_v a_o substance_n of_o a_o springy_a nature_n and_o that_o will_v suffer_v a_o considerable_a condensation_n as_o i_o have_v several_a time_n find_v by_o divers_a trial_n by_o which_o i_o have_v most_o evident_o condense_v it_o into_o less_o than_o a_o twenty_o part_n of_o its_o usual_a dimension_n near_o the_o earth_n and_o that_o with_o no_o other_o strength_n then_o that_o of_o my_o hand_n without_o any_o kind_n of_o force_v engine_n such_o as_o rack_n lever_n wheel_n pulley_n or_o the_o like_a but_o this_o only_a by_o and_o by_o and_o beside_o it_o seem_v very_o probable_a that_o those_o very_a film_n or_o side_n of_o the_o pore_n have_v in_o they_o a_o spring_a quality_n as_o almost_o all_o other_o kind_n of_o vegetable_a substance_n have_v so_o as_o to_o help_v to_o restore_v themselves_o to_o their_o former_a position_n and_o can_v we_o so_o easy_o and_o certain_o discover_v the_o schematisme_n and_o texture_n even_o of_o these_o film_n and_o of_o several_a other_o body_n as_o we_o can_v these_o of_o cork_n there_o seem_v no_o probable_a reason_n to_o the_o contrary_a but_o that_o we_o may_v as_o ready_o render_v the_o true_a reason_n of_o all_o their_o phaenomena_n as_o namely_o what_o be_v the_o cause_n of_o the_o springiness_n and_o toughness_n of_o some_o both_o as_o to_o their_o flexibility_n and_o restitution_n what_o of_o the_o friability_n or_o brittleness_n of_o some_o other_o and_o the_o like_a but_o till_o such_o time_n as_o our_o microscope_n or_o some_o other_o mean_n enable_v we_o to_o discover_v the_o true_a schematism_n and_o texture_n of_o all_o kind_n of_o body_n we_o must_v grope_v as_o it_o be_v in_o the_o dark_a and_o only_o guess_v at_o the_o true_a reason_n of_o thing_n by_o similitude_n and_o comparison_n schem_n xi_o to_o proceed_v then_o cork_n seem_v to_o be_v by_o the_o transverse_a constitution_n of_o the_o pore_n a_o kind_n of_o fungus_n or_o mushroom_n for_o the_o pore_n lie_v like_o so_o many_o ray_n tend_v from_o the_o centre_n or_o pith_n of_o the_o tree_n outward_o so_o that_o if_o you_o cut_v off_o a_o piece_n from_o a_o board_n of_o cork_n transvers_o to_o the_o flat_a of_o it_o you_o will_v as_o it_o be_v split_v the_o pore_n and_o they_o will_v appear_v just_a as_o they_o be_v express_v in_o the_o figure_n b_o of_o the_o xi_o scheme_n but_o if_o you_o shave_v off_o a_o very_a thin_a piece_n from_o this_o board_n parallel_n to_o the_o plain_a of_o it_o you_o will_v cut_v all_o the_o pore_n transvers_o and_o they_o will_v appear_v almost_o as_o they_o be_v express_v in_o the_o figure_n a_o save_v only_o the_o solid_a interstitia_fw-la will_v not_o appear_v so_o thick_a as_o they_o be_v there_o represent_v so_o that_o cork_n seem_v to_o suck_v its_o nourishment_n from_o the_o subjacent_a bark_n of_o the_o tree_n immediate_o and_o to_o be_v a_o kind_a excrescence_n or_o a_o substance_n distinct_a from_o the_o substance_n of_o the_o entire_a tree_n something_o analogus_fw-la to_o the_o mushroom_n or_o moss_n on_o other_o tree_n or_o to_o the_o hair_n on_o animal_n and_o have_v inquire_v into_o the_o history_n of_o cork_n i_o find_v it_o reckon_v as_o a_o excrescency_n of_o the_o bark_n of_o a_o certain_a tree_n which_o be_v distinct_a from_o the_o two_o bark_n that_o lie_v within_o it_o which_o be_v common_a also_o to_o other_o tree_n that_o it_o be_v some_o time_n before_o the_o cork_n that_o cover_v the_o young_a and_o tender_a sprout_n come_v to_o be_v discernible_a that_o it_o crack_v flaw_n and_o cleave_v into_o many_o great_a chap_n the_o bark_n underneath_o remain_v entire_a that_o it_o may_v be_v separate_v and_o remove_v from_o the_o tree_n and_o yet_o the_o two_o under-bark_n such_o as_o be_v also_o common_a to_o that_o with_o other_o tree_n not_o at_o all_o injure_a but_o rather_o help_v and_o free_v from_o a_o external_a injury_n thus_o jonstonus_n in_o dendrologia_n speak_v the_o subere_fw-la say_v arbour_n est_fw-fr procera_fw-fr lignum_fw-la est_fw-la robustum_fw-la dempto_fw-la cortice_fw-la in_o aquis_fw-la non_fw-la fluitat_fw-la cortice_fw-la in_o orbem_fw-la detracto_fw-la juvatur_fw-la crascescens_fw-la enim_fw-la praestringit_fw-la &_o strangulat_fw-la intra_fw-la triennium_fw-la iterum_fw-la repletur_fw-la caudex_fw-la ubi_fw-la adolescit_fw-la crassus_fw-la cortex_fw-la superior_a densus_fw-la carnosus_fw-la duos_fw-la digitos_fw-la crassus_fw-la scaber_n rimosus_fw-la &_o qui_fw-la nisi_fw-la detrahatur_fw-la dehiscit_fw-la alioque_fw-la subnascente_fw-la expellitur_fw-la interior_a qui_fw-la subest_fw-la novellus_fw-la ita_fw-la rubet_fw-la ut_fw-la arbour_n minio_fw-la picta_fw-la videatur_fw-la which_o history_n if_o well_o consider_v and_o the_o tree_n substance_n and_o manner_n of_o grow_v if_o well_o examine_v will_v i_o be_o very_o apt_a to_o believe_v much_o confirm_v this_o my_o conjecture_n about_o the_o origination_n of_o cork_n nor_o be_v this_o kind_n of_o texture_n peculiar_a to_o cork_n only_o for_o upon_o examination_n with_o my_o microscope_n i_o have_v find_v that_o the_o pith_n of_o a_o elder_a or_o almost_o any_o other_o tree_n the_o inner_a pulp_n or_o pith_n of_o the_o cany_fw-mi hollow_a stalk_n of_o several_a other_o vegetable_n as_o of_o fennel_n carrot_n daucus_n bur-dock_n teasel_n fearn_n some_o kind_n of_o reed_n etc._n etc._n have_v much_o such_o a_o kind_n of_o schematisme_n as_o i_o have_v late_o show_v that_o of_o cork_n save_v only_o that_o here_o the_o pore_n be_v range_v the_o long-way_n or_o the_o same_o way_n with_o the_o length_n of_o the_o cane_n whereas_o in_o cork_n they_o be_v transverse_v the_o pith_n also_o that_o fill_v that_o part_n of_o the_o stalk_n of_o a_o feather_n that_o be_v above_o the_o quill_n have_v much_o such_o a_o kind_n of_o texture_n save_v only_o that_o which_o way_n soever_o i_o set_v this_o light_a substance_n the_o pore_n seem_v to_o be_v cut_v transvers_o so_o that_o i_o guess_v this_o pith_n which_o fill_v the_o feather_n not_o to_o consist_v of_o abundance_n of_o long_a pore_n separate_v with_o diaphragm_n as_o cork_n do_v but_o to_o be_v a_o kind_n of_o solid_a or_o harden_a froth_n or_o a_o congery_n of_o very_a small_a bubble_n consolidate_v in_o that_o form_n into_o a_o pretty_a stiff_a as_o well_o as_o tough_a concrete_a and_o that_o each_o cavern_n bubble_n or_o cell_n be_v distinct_o separate_v from_o any_o of_o the_o rest_n without_o any_o kind_n of_o hole_n in_o the_o encompass_v film_n so_o that_o i_o can_v no_o more_o blow_n through_o a_o piece_n of_o this_o 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the_o glass_n for_o though_o perhaps_o it_o do_v make_v the_o several_a speck_n more_o radiant_a and_o glare_a yet_o by_o that_o mean_n unite_n more_o ray_n very_o near_o to_o one_o point_n it_o do_v make_v many_o of_o those_o radiant_a point_n conspicuous_a which_o by_o put_v on_o a_o less_o aperture_n may_v be_v find_v to_o vanish_v and_o therefore_o both_o for_o the_o discovery_n of_o the_o fix_a star_n and_o for_o find_v the_o satellite_n of_o jupiter_n before_o it_o be_v out_o of_o the_o day_n or_o twilight_n i_o always_o leave_v the_o object-glass_n as_o clear_v without_o any_o aperture_n as_o i_o can_v and_o have_v thereby_o be_v able_a to_o discover_v the_o satellite_n a_o long_a while_n before_o i_o be_v able_a to_o discern_v they_o when_o the_o small_a aperture_n be_v put_v on_o and_o at_o other_o time_n to_o see_v multitude_n of_o other_o small_a star_n which_o a_o small_a aperture_n make_v to_o disappear_v in_o that_o notable_a asterism_n also_o of_o the_o sword_n of_o orion_n where_o the_o ingenious_a mounseur_fw-fr hugens_fw-la van_fw-mi zulichem_n have_v discover_v only_o three_o little_a star_n in_o a_o cluster_n i_o have_v with_o a_o thirty_o six_o foot_n glass_n without_o any_o aperture_n the_o breadth_n of_o the_o glass_n be_v about_o some_o three_o inch_n and_o a_o half_a discover_v five_o and_o the_o twinkle_n of_o divers_z other_o up_o and_o down_o in_o divers_a part_n of_o that_o small_a milky_a cloud_n so_o that_o it_o be_v not_o unlikely_a but_o that_o the_o meliorate_n of_o telescope_n will_v afford_v as_o great_a a_o variety_n of_o new_a discovery_n in_o the_o heaven_n as_o better_a microscope_n will_v among_o small_a terrestrial_a body_n and_o both_o will_v give_v we_o infinite_a cause_n more_o and_o more_o to_o admire_v the_o omnipotence_n of_o the_o creator_n obseru._n lx._n of_o the_o moon_n schem_n xxxviii_o up_o and_o down_o in_o several_a part_n of_o this_o place_n here_o describe_v as_o there_o be_v multitude_n in_o other_o place_n all_o over_o the_o surface_n of_o the_o moon_n may_v be_v perceive_v several_a kind_n of_o pit_n which_o be_v shape_v almost_o like_o a_o dish_n some_o big_a some_o less_o some_o shallow_a some_o deep_a that_o be_v they_o sâ—em_v to_o be_v a_o hollow_a hemisphere_n encompass_v with_o a_o round_a rise_a bank_n as_o if_o the_o substance_n in_o the_o middle_n have_v be_v dig_v up_o and_o throw_v on_o either_o side_n these_o seem_v to_o i_o to_o have_v be_v the_o effect_n of_o some_o motion_n within_o the_o body_n of_o the_o moon_n analogus_fw-la to_o our_o earthquake_n by_o the_o eruption_n of_o which_o as_o it_o have_v throw_v up_o a_o brim_n or_o ridge_n round_o about_o high_o than_o the_o ambient_fw-la surface_n of_o the_o moon_n so_o have_v it_o leave_v a_o hole_n or_o depression_n in_o the_o middle_n proportionable_o low_a divers_a place_n resemble_v some_o of_o these_o i_o have_v observe_v here_o in_o england_n on_o the_o top_n of_o some_o hill_n which_o may_v have_v be_v cause_v by_o some_o earthquake_n in_o the_o young_a day_n of_o the_o world_n but_o that_o which_o do_v most_o incline_v i_o to_o this_o belief_n be_v first_o the_o generality_n and_o diversity_n of_o the_o magnitude_n of_o these_o pit_n all_o over_o the_o body_n of_o the_o moon_n next_o the_o two_o experimental_a way_n by_o which_o i_o have_v make_v a_o representation_n of_o they_o the_o first_o be_v with_o a_o very_a soft_a and_o well_o temper_a mixture_n of_o tobacco-pipe_n clay_n and_o water_n into_o which_o if_o i_o let_v fall_v any_o heavy_a body_n as_o a_o bullet_n it_o will_v throw_v up_o the_o mixture_n round_o the_o place_n which_o for_o a_o while_o will_v make_v a_o representation_n not_o unlike_o these_o of_o the_o moon_n but_o consider_v the_o state_n and_o condition_n of_o the_o moon_n there_o seem_v not_o any_o probability_n to_o imagine_v that_o it_o shall_v proceed_v from_o any_o cause_n analogus_fw-la to_o this_o for_o it_o will_v be_v difficult_a to_o imagine_v whence_o those_o body_n shall_v come_v and_o next_o how_o the_o substance_n of_o the_o moon_n shall_v be_v so_o soft_a but_o if_o a_o bubble_n be_v blow_v under_o the_o surface_n of_o it_o and_o suffer_v to_o rise_v and_o break_v or_o if_o a_o bullet_n or_o other_o body_n sink_v in_o it_o be_v pull_v out_o from_o it_o these_o depart_a body_n leave_v a_o impression_n on_o the_o surface_n of_o the_o mixture_n exact_o like_o these_o of_o the_o moon_n save_v that_o these_o also_o quick_o subside_o and_o vanish_v but_o the_o second_o and_o most_o notable_a representation_n be_v what_o i_o observe_v in_o a_o pot_n of_o boil_a alabaster_n for_o there_o that_o powder_n be_v by_o the_o eruption_n of_o vapour_n reduce_v to_o a_o kind_n of_o fluid_a consistence_n if_o while_o it_o boil_v it_o be_v gentle_o remove_v beside_o the_o fire_n the_o alabaster_n present_o cease_v to_o boil_v the_o whole_a surface_n especial_o that_o where_o some_o of_o the_o last_o bubble_n have_v rise_v will_v appear_v all_o over_o cover_v with_o small_a pit_n exact_o shape_v like_o these_o of_o the_o moon_n and_o by_o hold_v a_o light_a candle_n in_o a_o large_a dark_a room_n in_o divers_a position_n to_o this_o surface_n you_o may_v exact_o represent_v all_o the_o phaenomena_n of_o these_o pit_n in_o the_o moon_n according_a as_o they_o be_v more_o or_o less_o enlighten_v by_o the_o sun_n and_o that_o there_o may_v have_v be_v in_o the_o moon_n some_o such_o motion_n as_o this_o which_o may_v have_v make_v these_o pit_n will_v seem_v the_o more_o probable_a if_o we_o suppose_v it_o like_o our_o earth_n for_o the_o earthquake_n here_o with_o we_o seem_v to_o proceed_v from_o some_o such_o cause_n as_o the_o boil_a of_o the_o pot_n of_o alabaster_n there_o seem_v to_o be_v generate_v in_o the_o earth_n from_o some_o subterraneous_a fire_n or_o heat_n great_a quantity_n of_o vapour_n that_o be_v of_o expanded_a aerial_a substance_n which_o not_o present_o find_v a_o passage_n through_o the_o 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not_o whether_o there_o may_v be_v many_o thing_n do_v in_o nature_n in_o which_o this_o may_v not_o be_v say_v to_o have_v a_o finger_n this_o i_o have_v in_o some_o other_o passage_n of_o this_o treatise_n further_o inquire_v into_o and_o show_v that_o as_o well_o light_a as_o heat_n may_v be_v cause_v by_o corrosion_n which_o be_v applicable_a to_o congruity_n and_o consequent_o all_o the_o rest_n will_v be_v but_o subsequent_o in_o the_o mean_a time_n i_o will_v not_o willing_o be_v guilty_a of_o that_o error_n which_o the_o thrice_o noble_a and_o learned_a verulam_n just_o take_v notice_n of_o as_o such_o and_o call_v philosophiae_fw-la genus_fw-la empiricum_fw-la quod_fw-la in_o paucorum_fw-la experimentorum_fw-la angustiis_fw-la &_o obscuritate_fw-la fundatum_fw-la est_fw-la for_o i_o neither_o conclude_v from_o one_o single_a experiment_n nor_o be_v the_o experiment_n i_o make_v use_n of_o all_o make_v upon_o one_o subject_a nor_o wrest_v i_o any_o experiment_n to_o make_v it_o 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this_o order_n it_o always_o keep_v whatsoever_o be_v the_o middle_a colour_n there_o be_v further_o observable_a in_o several_a other_o part_n of_o this_o body_n many_o line_n or_o thread_n each_o of_o they_o of_o some_o one_o peculiar_a colour_n and_o those_o so_o exceed_o bright_a and_o vivid_n that_o it_o afford_v a_o very_a pleasant_a object_n through_o the_o microscope_n some_o of_o these_o thread_n i_o have_v observe_v also_o to_o be_v piece_v or_o make_v up_o of_o several_a short_a length_n of_o different_o colour_a end_n as_o i_o may_v so_o call_v they_o as_o a_o line_n appear_v about_o two_o inch_n long_o through_o the_o microscope_n have_v be_v compound_v of_o about_o half_a a_o inch_n of_o a_o peach_n colour_n ⅛_n of_o a_o lovely_a grass-green_n ¾_n of_o a_o inch_n more_o of_o a_o bright_a scarlet_n and_o the_o rest_n of_o the_o line_n of_o a_o watchet_a blue_a other_o of_o they_o be_v much_o otherwise_o colour_v the_o variety_n be_v almost_o infinite_a another_o thing_n 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i_o see_v not_o how_o the_o part_n of_o the_o diamond_n shall_v hold_v so_o firm_o together_o or_o remain_v in_o the_o same_o sensible_a dimension_n which_o yet_o they_o do_v next_o if_o they_o be_v globular_a and_o move_v only_o with_o a_o turbinated_a motion_n i_o know_v not_o any_o cause_n that_o can_v impress_v that_o motion_n upon_o the_o pellucid_a medium_n which_o yet_o be_v do_v three_o any_o other_o irregular_a motion_n of_o the_o part_v one_o among_o another_o must_v necessary_o make_v the_o body_n of_o a_o fluid_a consistence_n from_o which_o it_o be_v far_o enough_o it_o must_v therefore_o be_v a_o vibrate_v motion_n and_o three_o that_o it_o be_v a_o very_a short_a vibrate_v motion_n i_o think_v the_o instance_n draw_v from_o the_o shine_a of_o diamond_n will_v also_o make_v probable_a for_o a_o diamond_n be_v the_o hard_a body_n we_o yet_o know_v in_o the_o world_n and_o consequent_o the_o least_o apt_a to_o yield_v or_o bend_v must_v consequent_o also_o have_v its_o 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reason_n to_o affirm_v that_o it_o must_v be_v in_o a_o instant_n for_o i_o know_v not_o any_o one_o experiment_n or_o observation_n that_o do_v prove_v it_o and_o whereas_o it_o may_v be_v object_v that_o we_o see_v the_o sun_n rise_v at_o the_o very_a instant_n when_o it_o be_v above_o the_o sensible_a horizon_n and_o that_o we_o see_v a_o star_n hide_v by_o the_o body_n of_o the_o moon_n at_o the_o same_o instant_n when_o the_o star_n the_o moon_n and_o our_o eye_n be_v all_o in_o the_o same_o line_n and_o the_o like_a observation_n or_o rather_o supposition_n may_v be_v urge_v i_o have_v this_o to_o answer_v that_o i_o can_v as_o easy_o deny_v as_o they_o affirm_v for_o i_o will_v fain_o know_v by_o what_o mean_v any_o one_o can_v be_v assure_v any_o more_o of_o the_o affirmative_a than_o i_o of_o the_o negative_a if_o indeed_o the_o propagation_n be_v very_o slow_a it_o be_v possible_a something_o may_v be_v discover_v by_o eclipse_n of_o the_o moon_n but_o though_o we_o shall_v grant_v the_o progress_n of_o the_o light_n from_o the_o earth_n to_o the_o moon_n and_o from_o the_o moon_n back_o to_o the_o earth_n again_o to_o be_v full_a two_o minute_n in_o perform_v i_o know_v not_o any_o possible_a mean_n to_o discover_v it_o nay_o there_o may_v be_v some_o instance_n perhaps_o of_o horizontal_n eclipse_n that_o may_v seem_v very_o much_o to_o favour_v this_o supposition_n of_o the_o slow_a progression_n of_o light_n then_o most_o imagine_v and_o the_o like_a may_v be_v say_v of_o the_o eclipse_n of_o the_o sun_n etc._n etc._n but_o of_o this_o only_a by_o the_o by_o four_o that_o the_o motion_n be_v propagate_v every_o way_n through_o a_o homogeneous_a medium_n by_o direct_a or_o straight_a line_n extend_v every_o way_n like_o ray_n from_o the_o centre_n of_o a_o sphere_n five_o in_o a_o homogeneous_a medium_n this_o motion_n be_v propagate_v every_o way_n with_o equal_a velocity_n whence_o necessary_o every_o pulse_n or_o vitration_n of_o the_o luminous_a body_n will_v generate_v a_o sphere_n which_o will_v continual_o increase_v and_o grow_v big_a just_a after_o the_o same_o manner_n though_o indefinite_o swift_a as_o the_o wave_n or_o ring_v on_o the_o surface_n of_o the_o water_n do_v swell_v into_o big_a and_o big_a circle_n about_o a_o point_n of_o it_o where_o by_o the_o sink_n of_o a_o stone_n the_o motion_n be_v begin_v whence_o it_o necessary_o follow_v that_o all_o the_o part_n of_o these_o sphere_n undulate_v through_o a_o homogeneous_a medium_n cut_v the_o ray_n at_o right_a angle_n but_o because_o all_o transparent_a medium_n be_v not_o homogeneous_a to_o one_o another_o therefore_o we_o will_v next_o examine_v how_o this_o pulse_n or_o motion_n will_v be_v propagate_v through_o differ_o transparent_a medium_n and_o here_o according_a to_o the_o most_o acute_a and_o excellent_a philosopher_n des_n cartes_n i_o suppose_v the_o sign_n of_o the_o angle_n of_o inclination_n in_o the_o first_o medium_n to_o be_v to_o the_o sign_n of_o refraction_n in_o the_o second_o as_o the_o density_n of_o the_o first_o to_o the_o density_n of_o the_o second_o by_o density_n i_o mean_v not_o the_o density_n in_o respect_n of_o gravity_n with_o which_o the_o refraction_n or_o transparency_n of_o medium_n hold_v no_o proportion_n but_o in_o respect_n only_o to_o the_o trajection_n of_o the_o ray_n of_o light_n in_o which_o respect_n they_o only_o differ_v in_o this_o that_o the_o one_o propagate_v the_o pulse_n more_o easy_o and_o weak_o the_o other_o more_o slow_o but_o more_o strong_o but_o as_o for_o the_o pulse_n themselves_o they_o will_v by_o the_o refraction_n acquire_v another_o propriety_n which_o we_o shall_v now_o endeavour_v to_o explicate_v we_o will_v suppose_v therefore_o in_o the_o first_o figure_n acfd_v to_o be_v a_o physical_a ray_n or_o abc_n and_o def_n to_o
be_v two_o mathematical_a ray_n traject_v from_o a_o very_a remote_a point_n of_o a_o luminous_a body_n through_o a_o homogeneous_a transparent_a medium_n lll_n and_o da_fw-la ebb_n fc_n to_o be_v small_a portion_n of_o the_o orbicular_a impulse_n which_o must_v therefore_o cut_v the_o ray_n at_o right_a angle_n these_o ray_n meet_v with_o the_o plain_a surface_n no_o of_o a_o medium_n that_o yield_v a_o easy_a transitus_fw-la to_o the_o propagation_n of_o light_n and_o fall_v oblique_o on_o it_o they_o will_v in_o the_o medium_n mmm_o be_v refract_v towards_o the_o perpendicular_a of_o the_o surface_n and_o because_o this_o medium_n be_v more_o easy_o traject_v then_o the_o former_a by_o a_o three_o therefore_o the_o point_n c_o of_o the_o orbicular_a pulse_n fc_n will_v be_v move_v to_o h_n four_o space_n in_o the_o same_o time_n that_o f_o the_o other_o end_n of_o it_o be_v move_v to_o g_o three_o space_n therefore_o the_o whole_a refracted_a pulse_n gh_o shall_v be_v oblique_a to_o the_o refracted_a ray_n chk_v and_o give_v and_o the_o angle_n ghc_n shall_v be_v a_o acute_a and_o so_o much_o the_o more_o acute_a by_o how_o much_o the_o great_a the_o refraction_n be_v than_o which_o nothing_o be_v more_o evident_a for_o the_o sign_n of_o the_o inclination_n be_v to_o be_v the_o sign_n of_o refraction_n as_o gf_n to_o tc_n the_o distance_n between_o the_o point_n c_o and_o the_o perpendicular_a from_o g_z on_o ck_n which_o be_v as_o four_o to_o three_o hc_n be_v long_o than_o gf_n be_v long_o also_o than_o tc_n therefore_o the_o angle_n ghc_n be_v less_o than_o gtc._n so_o that_o henceforth_o the_o part_n of_o the_o pulse_n gh_a and_o ik_fw-mi be_v move_v ascew_n or_o cut_v the_o ray_n at_o oblique_a angle_n it_o be_v not_o my_o business_n in_o this_o place_n to_o set_v down_o the_o reason_n why_o this_o or_o that_o body_n shall_v impede_fw-la the_o ray_n more_o other_o less_o as_o why_o water_n shall_v transmit_v the_o ray_n more_o easy_o though_o more_o weak_o than_o air_n only_o thus_o much_o in_o general_n i_o shall_v hint_n that_o i_o suppose_v the_o medium_n mmm_o to_o have_v less_o of_o the_o transparent_a undulate_a subtle_a matter_n and_o that_o matter_n to_o be_v less_o implicate_v by_o it_o whereas_o lll_v i_o suppose_v to_o contain_v a_o great_a quantity_n of_o the_o fluid_a undulate_a substance_n and_o this_o to_o be_v more_o implicate_v with_o the_o particle_n of_o that_o medium_n but_o to_o proceed_v the_o same_o kind_n of_o obliquity_n of_o the_o pulse_n and_o ray_n will_v happen_v also_o when_o the_o refraction_n be_v make_v out_o of_o a_o more_o easy_a into_o a_o more_o difficult_a medium_n as_o by_o the_o calculation_n of_o gq_n &_o csr_n which_o be_v refract_v from_o the_o perpendicular_a in_o both_o which_o calculation_n it_o be_v obvious_a to_o observe_v that_o always_o that_o part_n of_o the_o ray_n towards_o which_o the_o refraction_n be_v make_v have_v the_o end_n of_o the_o orbicular_a pulse_n precedent_n to_o that_o of_o the_o other_o side_n and_o always_o the_o often_o the_o refraction_n be_v make_v the_o same_o way_n or_o the_o great_a the_o single_a refraction_n be_v the_o more_o be_v this_o unequal_a progress_n so_o that_o have_v find_v this_o odd_a propriety_n to_o be_v a_o inseparable_a concomitant_a of_o a_o refracted_a ray_n not_o straighten_v by_o a_o contrary_a refraction_n we_o will_v next_o examine_v the_o refraction_n of_o the_o sunbeam_n as_o they_o be_v suffer_v only_o to_o pass_v through_o a_o small_a passage_n oblique_o out_o of_o a_o more_o difficult_a into_o a_o more_o easy_a medium_n let_v we_o suppose_v therefore_o abc_n in_o the_o second_o figure_n to_o represent_v a_o large_a chemical_a glass-body_n about_o two_o foot_n long_o fill_v with_o very_o fair_a water_n as_o high_a as_o ab_fw-la and_o incline_v in_o a_o convenient_a posture_n with_o b_o towards_o the_o sun_n let_v we_o further_o suppose_v the_o top_n of_o it_o to_o be_v cover_v with_o a_o opacous_a body_n all_o but_o the_o hole_n ab_fw-la through_o which_o the_o sunbeam_n be_v suffer_v to_o pass_v into_o the_o water_n and_o be_v thereby_o refract_v to_o cdef_n against_o which_o part_n if_o a_o paper_n be_v expanded_a on_o the_o outside_n there_o will_v appear_v all_o the_o colour_n of_o the_o rainbow_n that_o be_v there_o will_v be_v generate_v the_o two_o principal_a colour_n scarlet_a and_o blue_n and_o all_o the_o intermediate_v one_o which_o arise_v from_o the_o composition_n and_o diluting_n of_o these_o two_o that_o be_v cd_o shall_v exhibit_v a_o scarlet_a which_o towards_o d_o be_v dilute_v into_o a_o yellow_a this_o be_v the_o refraction_n of_o the_o ray_n ik_fw-mi which_o come_v from_o the_o underside_n of_o the_o sun_n and_o the_o ray_n of_o shall_v appear_v of_o a_o deep_a blue_n which_o be_v gradual_o towards_o e_fw-la dilute_v into_o a_o pale_a watchet-blue_a between_o d_o and_o e_o the_o two_o diluted_a colour_n blue_a and_o yellow_a be_v mix_v and_o compound_v into_o a_o green_a and_o this_o i_o imagine_v to_o be_v the_o reason_n why_o green_n be_v so_o acceptable_a a_o colour_n to_o the_o eye_n and_o that_o either_o of_o the_o two_o extreme_n be_v if_z intense_a rather_o a_o little_a offensive_a namely_o the_o be_v place_v in_o the_o middle_n between_o the_o two_o extreme_n and_o compound_v out_o of_o both_o those_o dilute_v also_o or_o somewhat_o qualify_v for_o the_o composition_n arise_v from_o the_o mixture_n of_o the_o two_o extreme_n undilute_v make_v a_o purple_a which_o though_o it_o be_v a_o lovely_a colour_n and_o pretty_a acceptable_a to_o the_o eye_n yet_o be_v it_o nothing_o comparable_a to_o the_o ravish_a pleasure_n with_o which_o a_o curious_a and_o well_o temper_v green_n affect_v the_o eye_n if_o remove_v the_o paper_n the_o eye_n be_v place_v against_o cd_o it_o will_v perceive_v the_o low_a side_n of_o the_o sun_n or_o a_o candle_n at_o night_n which_o be_v much_o better_a because_o it_o offend_v not_o the_o eye_n and_o be_v more_o easy_o manageable_a to_o be_v of_o a_o deep_a reâ—_n and_o if_o against_o of_o it_o will_v perceive_v the_o upper_a part_n of_o the_o luminous_a body_n to_o be_v of_o a_o deep_a blue_n and_o these_o colour_n will_v appear_v deep_a and_o deep_o according_a as_o the_o ray_n from_o the_o luminous_a body_n fall_v more_o oblique_o on_o the_o surface_n of_o the_o water_n and_o thereby_o suffer_v a_o great_a refraction_n and_o the_o more_o distinct_a the_o further_a cdef_n be_v remove_v from_o the_o traject_v hole_n so_o that_o upon_o the_o whole_a we_o shall_v find_v that_o the_o reason_n of_o the_o phaenomena_n seem_v to_o depend_v upon_o the_o obliquity_n of_o the_o orbicular_a pulse_n to_o the_o line_n of_o radiation_n and_o in_o particular_a that_o the_o ray_n cd_o which_o constitute_v the_o scarlet_a have_v its_o inner_a part_n namely_o those_o which_o be_v next_o to_o the_o middle_n of_o the_o luminous_a body_n precedent_n to_o the_o outermost_a which_o be_v contiguous_a to_o the_o dark_a and_o unradiate_a sky_n and_o that_o the_o ray_n of_o which_o give_v a_o blue_a have_v its_o outward_a part_n namely_o that_o which_o be_v contiguous_a to_o the_o dark_a sky_n precedent_n to_o the_o pulse_n from_o the_o innermost_a which_o border_n on_o the_o bright_a area_n of_o the_o luminous_a body_n we_o may_v observe_v further_o that_o the_o cause_n of_o the_o dilute_v of_o the_o colour_n towards_o the_o middle_n proceed_v partly_o from_o the_o wideness_n of_o the_o hole_n through_o which_o the_o ray_n pass_v whereby_o the_o ray_n from_o several_a part_n of_o the_o luminous_a body_n fall_v upon_o many_o of_o the_o same_o part_n between_o c_o and_o f_z as_o be_v more_o manifest_a by_o the_o figure_n and_o partly_o also_o from_o the_o nature_n of_o the_o refraction_n itself_o for_o the_o vividness_n or_o strength_n of_o the_o two_o terminate_a colour_n arise_v chief_o as_o we_o have_v see_v from_o the_o very_a great_a difference_n that_o be_v betwixt_o the_o outside_n of_o those_o oblique_a undulation_n &_o the_o dark_a ray_n circumambient_a and_o that_o disparity_n betwixt_o the_o approximate_a ray_n decay_v gradual_o the_o further_a inward_a towards_o the_o middle_n of_o the_o luminous_a body_n they_o be_v remove_v the_o more_o must_v the_o colour_n approach_n to_o a_o white_a or_o a_o undisturbed_a light_n upon_o the_o calculation_n of_o the_o refraction_n and_o reflection_n from_o a_o ball_n of_o water_n or_o glass_n we_o have_v much_o the_o same_o phaenomena_n namely_o a_o obliquity_n of_o the_o undulation_n in_o the_o same_o manner_n as_o we_o have_v find_v it_o here_o which_o because_o it_o be_v very_o much_o to_o our_o present_a purpose_n and_o afford_v such_o a_o instancia_fw-la crucis_fw-la as_o no_o one_o that_o i_o know_v have_v hitherto_o take_v notice_n of_o i_o shall_v further_o examine_v for_o it_o do_v
impression_n on_o the_o eye_n of_o a_o red._n but_o three_o if_o the_o two_o reflect_a surface_n be_v yet_o further_o remove_v asunder_o '_o as_o in_o 3_o cd_o and_o of_o are_z then_o will_v the_o weak_a pulse_n be_v so_o far_o behind_o that_o it_o will_v be_v more_o than_o half_a the_o distance_n between_o cd_o and_o cd_o and_o in_o this_o case_n it_o will_v rather_o seem_v to_o precede_v the_o follow_a strong_a pulse_n then_o to_o follow_v the_o precede_a one_o and_o consequent_o a_o blue_n will_v be_v generate_v and_o when_o the_o weak_a pulse_n be_v just_a in_o the_o middle_n between_o two_o strong_a one_o then_o be_v a_o deep_a and_o lovely_a purple_n generate_v but_o when_o the_o weak_a pulse_n of_o be_v very_o near_o to_o cd_o then_o be_v there_o generate_v a_o green_a which_o will_v be_v bluer_n or_o yellow_a according_a as_o the_o approximate_a weak_a pulse_n do_v precede_v or_o follow_v the_o strong_a now_o four_a if_o the_o thick_a plate_n chance_v to_o be_v cleave_v into_o two_o thin_a plate_n as_o cdfe_n be_v divide_v into_o two_o plate_n by_o the_o surface_n gh_o then_o from_o the_o composition_n arise_v from_o the_o three_o reflection_n in_o the_o surface_v cd_o gh_n and_o of_o there_o will_v be_v generate_v several_a compound_v or_o mix_v colour_n which_o will_v be_v very_o differ_v according_a as_o the_o proportion_n between_o the_o thickness_n of_o those_o two_o divide_a plate_n cdhg_v and_o ghfe_n be_v vary_v and_o five_o if_o these_o surface_v cd_o and_o fe_o be_v further_o remove_v asunder_o the_o weak_a pulse_n will_v yet_o lagg_z behind_o much_o further_o and_o not_o only_o be_v coincident_a with_o the_o second_o cd_o but_o lagg_z behind_o that_o also_o and_o that_o so_o much_o the_o more_o by_o how_o much_o the_o thick_a the_o plate_n be_v so_o that_o by_o degree_n it_o will_v be_v coincident_a with_o the_o three_o cd_o backward_o also_o and_o by_o degree_n as_o the_o plate_n grow_v thick_a with_o a_o four_o and_o so_o onward_o to_o a_o five_o six_o seven_o or_o eight_o so_o that_o if_o there_o be_v a_o thin_a transparent_a body_n that_o from_o the_o great_a thinness_n requisite_a to_o produce_v colour_n do_v in_o the_o manner_n of_o a_o wedge_n by_o degree_n grow_v to_o the_o great_a thickness_n that_o a_o plate_n can_v be_v of_o to_o exhibit_v a_o colour_n by_o the_o reflection_n of_o light_n from_o such_o a_o body_n there_o shall_v be_v generate_v several_a consecution_n of_o colour_n who_o order_n from_o the_o thin_a end_n towards_o the_o thick_a shall_v be_v yellow_a red_a purple_a blue_n green_n yellow_a red_a purple_a blue_n green_n yellow_a red_a purple_a blue_n green_n yellow_a etc._n etc._n and_o these_o so_o often_o repeat_v as_o the_o weak_a pulse_n do_v lose_v pace_n with_o its_o primary_n or_o first_o pulse_n and_o be_v coincident_a with_o a_o second_o three_o four_o five_o six_o etc._n etc._n pulse_n behind_o the_o first_o and_o this_o as_o it_o be_v coincident_a or_o follow_v from_o the_o first_o hypothesis_n i_o take_v of_o colour_n so_o upon_o exeriment_n have_v i_o find_v it_o in_o multitude_n of_o instance_n that_o seem_v to_o prove_v it_o one_o thing_n which_o seem_v of_o the_o great_a concern_v in_o this_o hypothesis_n be_v to_o determine_v the_o great_a or_o least_o thickness_n requisite_a for_o these_o effect_n which_o though_o i_o have_v not_o be_v want_v in_o attempt_v yet_o so_o exceed_v thin_a be_v these_o colour_a plate_n and_o so_o imperfect_a our_o microscope_n that_o i_o have_v not_o be_v hitherto_o successful_a though_o if_o my_o endeavour_n shall_v answer_v my_o expectation_n i_o shall_v hope_v to_o gratify_v the_o curious_a reader_n with_o some_o thing_n more_o remove_v beyond_o our_o reach_n hitherto_o thus_o have_v i_o with_o as_o much_o brevity_n as_o i_o be_v able_a endeavour_v to_o explicate_v hypothetical_o at_o least_o the_o cause_n of_o the_o phaenomena_n i_o former_o recite_v on_o the_o consideration_n of_o which_o i_o have_v be_v the_o more_o particular_a first_o because_o i_o think_v these_o i_o have_v new_o give_v be_v capable_a of_o explicate_v all_o the_o phaenomena_n of_o colour_n not_o only_o of_o those_o appear_v in_o the_o prism_n water-drop_n or_o rainbow_n and_o in_o laminated_a or_o plate_a body_n but_o of_o all_o that_o be_v in_o the_o world_n whether_o they_o be_v fluid_a or_o solid_a body_n whether_o in_o thick_a or_o thin_a whether_o transparent_a or_o seem_o opacous_a as_o i_o shall_v in_o the_o next_o observation_n further_o endeavour_v to_o show_v and_o second_o because_o this_o be_v one_o of_o the_o two_o ornament_n of_o all_o body_n discoverable_a by_o the_o sight_n whether_o look_v on_o with_o or_o without_o a_o microscope_n it_o seem_v to_o deserve_v somewhere_o in_o this_o tract_n which_o contain_v a_o description_n of_o the_o figure_n and_o colour_n of_o some_o minute_n body_n to_o be_v somewhat_o the_o more_o intimate_o inquire_v into_o obseru._n x._o of_o metalline_a and_o other_o real_a colour_n have_v in_o the_o former_a discourse_n from_o the_o fundamental_a cause_n of_o colour_n make_v it_o probable_a that_o there_o be_v but_o two_o colour_n and_o show_v that_o the_o phantasm_n of_o colour_n be_v cause_v by_o the_o sensation_n of_o the_o oblique_a or_o uneven_a pulse_n of_o light_n which_o be_v capable_a of_o no_o more_o variety_n than_o two_o that_o arise_v from_o the_o two_o side_n of_o the_o oblique_a pulse_n though_o each_o of_o those_o be_v capable_a of_o infinite_a gradation_n or_o degree_n each_o of_o they_o beginning_n from_o white_a and_o end_v the_o one_o in_o the_o deep_a scarlet_a or_o yellow_a the_o other_o in_o the_o deep_a blue_n i_o shall_v in_o this_o section_n set_v down_o some_o observation_n which_o i_o have_v make_v of_o other_o colour_n such_o as_o metalline_a powder_n ting_v or_o colour_a body_n and_o several_a kind_n of_o tincture_n or_o tinged_a liquor_n all_o which_o together_o with_o those_o i_o treat_v of_o in_o the_o former_a observation_n will_v i_o suppose_v comprise_v the_o several_a subject_n in_o which_o colour_n be_v observe_v to_o be_v inherent_a and_o the_o several_a manner_n by_o which_o it_o inhere_n or_o be_v apparent_a in_o they_o and_o here_o i_o shall_v endeavour_v to_o show_v by_o what_o composition_n all_o kind_n of_o compound_a colour_n be_v make_v and_o how_o there_o be_v no_o colour_n in_o the_o world_n but_o may_v be_v make_v from_o the_o various_a degree_n of_o these_o two_o colour_n together_o with_o the_o intermixture_n of_o black_a and_o white_a and_o this_o be_v so_o as_o i_o shall_v anon_o show_v it_o seem_v a_o evident_a argument_n to_o i_o that_o all_o colour_n whatsoever_o whether_o in_o fluid_a or_o solid_a whether_o in_o very_o transparent_a or_o seem_o opacous_a have_v the_o same_o efficient_a cause_n to_o wit_n some_o kind_n of_o refraction_n whereby_o the_o ray_n that_o proceed_v from_o such_o body_n have_v their_o pulse_n obliquate_v or_o confuse_v in_o the_o manner_n i_o explicate_v in_o the_o former_a section_n that_o be_v a_o red_a be_v cause_v by_o a_o duplicate_v or_o confuse_v pulse_n who_o strong_a pulse_n precede_v and_o a_o weak_a follow_v and_o a_o blue_n be_v cause_v by_o a_o confuse_a pulse_n where_o the_o weak_a pulse_n precede_v and_o the_o strong_a follow_v and_o according_a as_o these_o be_v more_o or_o less_o or_o various_o mix_v and_o compound_v so_o be_v the_o sensation_n and_o consequent_o the_o phantasm_n of_o colour_n diversify_v to_o proceed_v therefore_o i_o suppose_v that_o all_o transparent_a colour_a body_n whether_o fluid_a or_o solid_a do_v consist_v at_o least_o of_o two_o part_n or_o two_o kind_n of_o substance_n the_o one_o of_o a_o substance_n of_o a_o somewhat_o differ_v refraction_n from_o the_o other_o that_o one_o of_o these_o substance_n which_o may_v be_v call_v the_o ting_a substance_n do_v consist_v of_o distinct_a part_n or_o particle_n of_o a_o determinate_a bigness_n which_o be_v disseminated_a or_o disperse_v all_o over_o the_o other_o that_o these_o particle_n if_o the_o body_n be_v equal_o and_o uniform_o colour_v be_v even_o range_v and_o disperse_v over_o the_o other_o contiguous_a body_n that_o where_o the_o body_n be_v deep_a tinge_v there_o these_o particle_n be_v range_v thick_a and_o where_o it_o be_v but_o faint_o tinge_v they_o be_v range_v much_o thin_a but_o uniform_o that_o by_o the_o mixture_n of_o another_o body_n that_o unite_v with_o either_o of_o these_o which_o have_v a_o differ_a refraction_n from_o either_o of_o the_o other_o quite_o differ_v effect_n will_v be_v produce_v that_o be_v the_o consecution_n of_o the_o confuse_a pulse_n will_v be_v much_o of_o another_o kind_n and_o consequent_o produce_v other_o sensation_n and_o phantasm_n of_o colour_n and_o from_o a_o red_a may_v turn_v to_o a_o blue_n or_o from_o a_o blue_n to_o a_o red_a etc._n etc._n
their_o bigness_n and_o figure_n may_v be_v see_v in_o the_o second_o figure_n of_o the_o six_o plate_n which_o represent_v about_o a_o dozen_o of_o they_o lie_v upon_o a_o plate_n abcd_v some_o of_o which_o as_o a_o b_o c_o d_o seem_v more_o regular_a than_o the_o rest_n and_o e_z which_o be_v a_o small_a one_o frick_v on_o the_o top_n of_o another_o be_v a_o perfect_a rhomboeid_n on_o the_o top_n and_o have_v four_o rectagular_a side_n the_o line_n e_o which_o be_v the_o measure_n of_o the_o microscope_n be_v 1_o 3â—_n part_n of_o a_o english_a inch_n so_o that_o the_o great_a breadth_n of_o any_o of_o they_o exceed_v not_o 1_o 12â—_n part_n of_o a_o inch._n put_v these_o into_o several_a liquor_n i_o find_v oil_n of_o vitriul_n spirit_n of_o urine_n and_o several_a other_o satin_n menstruum_v to_o dissolve_v they_o and_o the_o first_o of_o these_o in_o less_o than_o a_o minute_n without_o ebullition_n water_n and_o several_a other_o liquor_n have_v no_o sudden_a operation_n upon_o they_o this_o i_o mention_v because_o those_o liquor_n that_o dissolve_v they_o first_o make_v they_o very_o white_a not_o vitiate_a but_o rather_o rectify_v their_o figure_n and_o thereby_o make_v they_o afford_v a_o very_a pretty_a object_n for_o the_o microscope_n how_o great_a a_o advantage_n it_o will_v be_v to_o such_o as_o be_v trouble_v with_o the_o stone_n to_o find_v some_o menstruum_fw-la that_o may_v dissolve_v they_o without_o hurt_v the_o bladder_n be_v easy_o imagine_v since_o some_o injection_n make_v of_o such_o body_n may_v likewise_o dissolve_v the_o stone_n which_o seem_v much_o of_o the_o same_o nature_n it_o may_v therefore_o perhaps_o be_v worthy_a some_o physician_n enquiry_n whether_o there_o may_v not_o be_v something_o mix_v with_o the_o urine_n in_o which_o the_o gravel_n or_o stone_n lie_v which_o may_v again_o make_v it_o dissolve_v it_o the_o first_o of_o which_o seem_v by_o its_o regular_a figure_n to_o have_v be_v sometime_o crystallize_v out_o of_o it_o for_o whether_o this_o crystallization_n be_v make_v in_o the_o manner_n as_o alum_n peter_n etc._n etc._n be_v crystallize_v out_o of_o a_o cool_a liquor_n in_o which_o by_o boil_v they_o have_v be_v dissolve_v or_o whether_o it_o be_v make_v in_o the_o manner_n of_o tartarum_fw-la vitriolatum_fw-la that_o be_v by_o the_o coalition_n of_o a_o acid_n and_o a_o sulphureous_a substance_n it_o seem_v not_o impossible_a but_o that_o the_o liquor_n it_o lie_v in_o may_v be_v again_o make_v a_o dissolvent_a of_o it_o but_o leave_v these_o inquiry_n to_o physician_n or_o chemist_n to_o who_o it_o do_v more_o proper_o belong_v i_o shall_v proceed_v obseru._n xiii_o of_o the_o small_a diamond_n or_o spark_n in_o flint_n chance_v to_o break_v a_o flint_n stone_n in_o piece_n i_o find_v within_o it_o a_o certain_a cavity_n all_o crust_v over_o with_o a_o very_a pretty_a candy_a substance_n some_o of_o the_o part_n of_o which_o upon_o change_v the_o posture_n of_o the_o stone_n in_o respect_n of_o the_o incident_a light_n exhibit_v a_o number_n of_o small_a but_o very_o vivid_v reflection_n and_o have_v make_v use_v of_o my_o microscope_n i_o can_v perceive_v the_o whole_a surface_n of_o that_o cavity_n to_o be_v all_o beset_v with_o a_o multitude_n of_o little_a crystaline_a or_o adamantine_a body_n so_o curious_o shape_v that_o it_o afford_v a_o not_o unpleasing_a object_n have_v consider_v those_o vivid_n repercussion_n of_o light_n i_o find_v they_o to_o be_v make_v partly_o from_o the_o plain_a external_a surface_n of_o these_o regular_o figure_v body_n which_o afford_v the_o vivid_v reflection_n and_o partly_o to_o be_v make_v from_o within_o the_o somewhat_o pellucid_a body_n that_o be_v from_o some_o surface_n of_o the_o body_n opposite_a to_o that_o superficies_n of_o it_o which_o be_v next_o the_o eye_n and_o because_o these_o body_n be_v so_o small_a that_o i_o can_v not_o well_o come_v to_o make_v experiment_n and_o examination_n of_o they_o i_o provide_v i_o several_a small_a stiriae_fw-la of_o crystal_n or_o diamond_n find_v in_o great_a quantity_n in_o cornwall_n and_o be_v therefore_o common_o call_v cornish_n diamond_n these_o be_v very_o pellucid_a and_o grow_v in_o a_o hollow_a cavity_n of_o a_o rock_n as_o i_o have_v be_v several_a time_n inform_v by_o those_o that_o have_v observe_v they_o much_o after_o the_o same_o manner_n as_o these_o do_v in_o the_o flint_n and_o have_v beside_o their_o outward_a surface_n very_o regular_o shape_v retain_v very_o near_o the_o same_o figure_n with_o some_o of_o those_o i_o observe_v in_o the_o other_o become_v a_o convenient_a help_n to_o i_o for_o the_o examination_n of_o the_o property_n of_o those_o kind_n of_o body_n and_o first_o for_o the_o reflection_n in_o these_o i_o find_v it_o very_o observable_a that_o the_o bright_a reflection_n of_o light_n proceed_v from_o within_o the_o pellucid_a body_n that_o be_v that_o the_o ray_n admit_v through_o the_o pellucid_a substance_n in_o their_o get_n out_o on_o the_o opposite_a side_n be_v by_o the_o contiguous_a and_o strong_a reflect_a surface_n of_o the_o air_n very_o vivid_o reflect_v so_o that_o more_o ray_n be_v reflect_v to_o the_o eye_n by_o this_o surface_n though_o the_o ray_n in_o enter_v and_o get_v out_o of_o the_o crystal_n have_v suffer_v a_o double_a refraction_n than_o there_o be_v from_o the_o outward_a surface_n of_o the_o glass_n where_o the_o ray_n have_v suffer_v no_o reftraction_n at_o all_o sche_n vii_o and_o that_o this_o be_v the_o surface_n of_o the_o air_n that_o give_v so_o vivid_v a_o re-percussion_n i_o try_v by_o this_o mean_n i_o sink_v half_a of_o a_o stiria_n in_o water_n so_o that_o only_a water_n be_v contiguous_a to_o the_o under_o surface_n and_o then_o the_o internal_a reflection_n be_v so_o exceed_o faint_a that_o it_o be_v scarce_o discernible_a again_o i_o try_v to_o alter_v this_o vivid_n reflection_n by_o keep_v off_o the_o air_n with_o a_o body_n not_o fluid_a and_o that_o be_v by_o rub_v and_o hold_v my_o finger_n very_o hard_o against_o the_o under_o surface_n so_o as_o in_o many_o place_n the_o pulp_n of_o my_o finger_n do_v touch_v the_o glass_n without_o any_o interjacent_a air_n between_o then_o observe_v the_o reflection_n i_o find_v that_o wheresoever_o my_o finger_n or_o skin_n touch_v the_o surface_n from_o that_o part_n there_o be_v no_o reflection_n but_o in_o the_o little_a furrow_n or_o crease_v of_o my_o skin_n where_o there_o remain_v little_a small_a line_n of_o air_n from_o they_o be_v return_v a_o very_a vivid_fw-la reflection_n as_o before_o i_o try_v further_o by_o make_v the_o surface_n of_o very_a pure_a quicksilver_n to_o be_v contiguous_a to_o the_o under_o surface_n of_o this_o pellucid_a body_n and_o then_o the_o reflection_n from_o that_o be_v so_o exceed_o more_a vivid_n than_o from_o the_o air_n as_o the_o reflection_n from_o air_n be_v than_o the_o reflection_n from_o the_o water_n from_o all_o which_o trial_n i_o plain_o see_v that_o the_o strong_a reflect_a air_n be_v the_o cause_n of_o this_o phaenomenon_n and_o this_o agree_v very_o well_o with_o the_o hypothesis_n of_o light_n and_o pellucid_a body_n which_o i_o have_v mention_v in_o the_o description_n of_o muscovy-glass_n for_o we_o there_o suppose_v glass_n to_o be_v a_o medium_n which_o do_v less_o resist_v the_o pulse_n of_o light_n and_o consequent_o that_o most_o of_o the_o ray_n incident_a on_o it_o enter_v into_o it_o and_o be_v refract_v towards_o the_o perpendicular_a whereas_o the_o air_n i_o suppose_v to_o be_v a_o body_n that_o do_v more_o resist_v it_o and_o consequent_o more_o be_v re-percussed_a then_o do_v enter_v it_o the_o same_o kind_n of_o trial_n have_v i_o make_v with_o crystalline_a glass_n with_o drop_n of_o fluid_a body_n and_o several_a other_o way_n which_o do_v all_o seem_v to_o agree_v very_o exact_o with_o this_o theory_n so_o that_o from_o this_o principle_n well_o establish_v we_o may_v deduce_v several_a corollary_n not_o unworthy_a observation_n and_o the_o first_o be_v that_o it_o plain_o appear_v by_o this_o that_o the_o production_n of_o the_o rainbow_n be_v as_o much_o to_o be_v ascribe_v to_o the_o reflection_n of_o the_o concave_a surface_n of_o the_o air_n as_o to_o the_o refraction_n of_o the_o globular_a drop_n this_o will_v be_v evident_o manifest_a by_o these_o experiment_n if_o you_o foliate_v that_o part_n of_o a_o glass-ball_n that_o be_v to_o reflect_v a_o iris_n as_o in_o the_o cartesian_a experiment_n above_o mention_v the_o reflection_n will_v be_v abundant_o more_o strong_a and_o the_o colour_n more_o vivid_v and_o if_o that_o part_n of_o the_o surface_n be_v touch_v with_o water_n scarce_o afford_v any_o sensible_a colour_n at_o all_o next_o we_o learn_v that_o the_o great_a reason_n why_o pellucid_a body_n beat_v small_a be_v white_a be_v from_o the_o
multitude_n of_o reflection_n not_o from_o the_o particle_n of_o the_o body_n but_o from_o the_o contiguous_a surface_n of_o the_o air_n and_o this_o be_v evident_o manifest_v by_o fill_v the_o interstitia_fw-la of_o those_o powder_a body_n with_o water_n whereby_o their_o whiteness_n present_o disappear_v from_o the_o same_o reason_n proceed_v the_o whiteness_n of_o many_o kind_n of_o sand_n which_o in_o the_o microscope_n appear_v to_o be_v make_v up_o of_o a_o multitude_n of_o little_a pellucid_a body_n who_o bright_a reflection_n may_v by_o the_o microscope_n be_v plain_o perceive_v to_o come_v from_o their_o internal_a surface_n and_o much_o of_o the_o whiteness_n of_o it_o may_v be_v destroy_v by_o the_o affusion_n of_o fair_a water_n to_o be_v contiguous_a to_o those_o surface_n the_o whiteness_n also_o of_o froth_n be_v for_o the_o most_o part_n to_o be_v ascribe_v to_o the_o reflection_n of_o the_o light_n from_o the_o surface_n of_o the_o air_n within_o the_o bubble_n and_o very_o little_a to_o the_o reflection_n from_o the_o surface_n of_o the_o water_n itself_o for_o this_o last_o reflection_n do_v not_o return_v a_o quarter_n so_o many_o ray_n as_o that_o which_o be_v make_v from_o the_o surface_n of_o the_o air_n as_o i_o have_v certain_o find_v by_o a_o multitude_n of_o observation_n and_o experiment_n the_o whiteness_n of_o linen_n paper_n silk_n etc._n etc._n proceed_v much_o from_o the_o same_o reason_n as_o the_o microscope_n will_v easy_o discover_v for_o the_o paper_n be_v make_v up_o of_o a_o abundance_n of_o pellucid_a body_n which_o afford_v a_o very_a plentiful_a reflection_n from_o within_o that_o be_v from_o the_o concave_a surface_n of_o the_o air_n contiguous_a to_o its_o component_a particle_n wherefore_o by_o the_o affusion_n of_o water_n oil_n tallow_n turpentine_n etc._n etc._n all_o those_o reflection_n be_v make_v more_o faint_a and_o the_o beam_n of_o light_n be_v suffer_v to_o traject_n &_o run_v through_o the_o paper_n more_o free_o hence_o further_o we_o may_v learn_v the_o reason_n of_o the_o whiteness_n of_o many_o body_n and_o by_o what_o mean_v they_o may_v be_v in_o part_n make_v pellucid_a as_o white_a marble_n for_o instance_n for_o this_o body_n be_v compose_v of_o a_o pellucid_a body_n exceed_o flaw_v that_o be_v there_o be_v abundance_n of_o thin_a and_o very_o fine_a crack_n or_o chink_n among_o the_o multitude_n of_o particle_n of_o the_o body_n that_o contain_v in_o they_o small_a parcel_n of_o air_n which_o do_v so_o re-percuss_a and_o drive_v back_o the_o penetrate_a beam_n that_o they_o can_v enter_v very_o deep_a within_o that_o body_n which_o the_o microscope_n do_v plain_o inform_v we_o to_o be_v make_v up_o of_o a_o congery_n of_o pellucid_a particle_n and_o i_o further_o find_v it_o somewhat_o more_o evident_o by_o some_o attempt_n i_o make_v towards_o the_o make_n transparent_a marble_n for_o by_o heat_n the_o stone_n a_o little_a and_o soak_v it_o in_o oil_n turpentine_n oil_n of_o 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those_o pore_n be_v fill_v with_o a_o medium_n that_o have_v much_o the_o same_o refraction_n with_o the_o particle_n of_o the_o stone_n and_o therefore_o those_o two_o be_v contiguous_a make_v as_o it_o be_v one_o continue_a medium_n of_o which_o more_o be_v say_v in_o the_o 15._o observation_n there_o be_v a_o multitude_n of_o other_o phaenomena_n that_o be_v produce_v from_o this_o same_o principle_n which_o as_o it_o have_v not_o be_v take_v notice_n of_o by_o any_o yet_o that_o i_o know_v so_o i_o think_v upon_o more_o diligent_a observation_n will_v it_o not_o be_v find_v the_o least_o considerable_a but_o i_o have_v here_o only_a time_n to_o hint_n hypothesis_n and_o not_o to_o prosecute_v they_o so_o full_o as_o i_o can_v with_o many_o of_o they_o have_v a_o vast_a extent_n in_o the_o production_n of_o a_o multitude_n of_o phaenomena_n which_o have_v be_v by_o other_o either_o not_o attempt_v to_o be_v explain_v or_o else_o attribute_v to_o some_o other_o cause_n than_o what_o i_o have_v assign_v and_o perhaps_o than_o the_o right_n and_o therefore_o i_o shall_v leave_v this_o to_o the_o prosecution_n of_o such_o as_o have_v more_o leisure_n only_o before_o i_o leave_v it_o i_o must_v not_o pretermit_v to_o hint_n that_o by_o this_o principle_n multitude_n of_o the_o phaenomena_n of_o the_o air_n as_o about_o mist_n cloud_n meteor_n halo_n etc._n etc._n be_v most_o plain_o and_o perhaps_o true_o explicable_a multitude_n also_o of_o the_o phaenomena_n in_o colour_a body_n as_o liquor_n etc._n etc._n be_v deducible_a from_o it_o and_o from_o this_o i_o shall_v proceed_v to_o a_o second_o considerable_a phaenomenon_n which_o these_o diamond_n exhibit_v and_o that_o be_v the_o regularity_n of_o their_o figure_n which_o be_v a_o propriety_n not_o less_o general_n than_o the_o former_a it_o comprise_v within_o its_o extent_n all_o kind_n of_o metal_n all_o kind_n of_o mineral_n most_o precious_a stone_n all_o kind_n of_o salt_n multitude_n of_o earth_n and_o almost_o all_o kind_n of_o fluid_a body_n and_o this_o be_v another_o propiety_n which_o though_o a_o little_a superficial_o take_v notice_n of_o by_o some_o have_v not_o that_o i_o know_v be_v so_o much_o as_o attempt_v to_o be_v explicate_v by_o any_o this_o propriety_n of_o body_n as_o i_o think_v it_o the_o most_o worthy_a and_o next_o in_o order_n to_o be_v consider_v after_o the_o contemplation_n of_o the_o globular_a figure_n so_o have_v i_o long_o have_v a_o desire_n as_o well_o as_o a_o determination_n to_o have_v prosecute_v it_o if_o i_o have_v have_v a_o opportunity_n have_v long_o since_o propose_v to_o myself_o the_o method_n of_o my_o enquiry_n therein_o it_o contain_v all_o the_o allurement_n that_o i_o think_v any_o enquiry_n be_v capable_a of_o for_o first_o i_o take_v it_o to_o proceed_v from_o the_o most_o simple_a principle_n that_o any_o kind_n of_o form_n can_v come_v from_o next_o the_o globular_a which_o be_v therefore_o the_o first_o i_o set_v upon_o and_o what_o i_o have_v therein_o perform_v i_o leave_v the_o judicious_a reader_n to_o determine_v for_o as_o that_o form_n proceed_v from_o a_o propiety_n of_o fluid_a body_n which_o i_o have_v call_v congruity_n or_o incongruity_n so_o i_o think_v have_v i_o time_n and_o opportunity_n i_o can_v make_v probable_a that_o all_o these_o regular_a figure_n that_o be_v so_o conspicuous_o various_a and_o curious_a and_o do_v so_o adorn_v and_o beautify_v such_o multitude_n of_o body_n as_o i_o have_v above_o hint_v arise_v only_o from_o three_o or_o four_o several_a position_n or_o posture_n of_o globular_a particle_n and_o those_o the_o most_o plain_a obvious_a and_o necessary_a conjunction_n of_o such_o figure_v particle_n that_o be_v possible_a so_o that_o suppose_v such_o and_o such_o plain_a and_o obvious_a cause_n concur_v the_o coagulate_a particle_n must_v necessary_o compose_v a_o body_n of_o such_o a_o determinate_a regular_a figure_n and_o no_o other_o and_o this_o with_o as_o much_o necessity_n and_o obviousness_n as_o a_o fluid_a body_n encompass_v with_o a_o heterogeneous_a fluid_n must_v be_v protrude_v into_o a_o spherule_n or_o globe_n and_o this_o i_o have_v ad_fw-la oculum_fw-la demonstrate_v with_o a_o company_n of_o bullet_n and_o some_o few_o other_o very_o simple_a body_n so_o that_o there_o be_v not_o any_o regular_a figure_n which_o i_o have_v hitherto_o meet_v withal_o of_o any_o of_o those_o body_n that_o i_o have_v above_o name_v that_o i_o can_v not_o with_o the_o composition_n of_o bullet_n or_o globule_n and_o one_o or_o two_o other_o body_n imitate_v even_o almost_o by_o shake_v they_o together_o and_o thus_o for_o instance_n may_v we_o find_v that_o the_o globular_a bullet_n will_v of_o themselves_o if_o put_v on_o a_o incline_a plain_n so_o that_o they_o may_v run_v together_o natural_o run_v into_o a_o triangular_a order_n compose_v all_o the_o variety_n of_o
or_o fixtness_n of_o a_o body_n seem_v to_o consist_v only_o in_o this_o that_o the_o one_o be_v of_o a_o texture_n or_o have_v component_a part_n that_o will_v be_v easy_o rarify_v into_o the_o form_n of_o air_n and_o the_o other_o that_o it_o have_v such_o as_o will_v not_o without_o much_o ado_n be_v bring_v to_o such_o a_o constitution_n and_o this_o be_v that_o part_n which_o remain_v behind_o in_o a_o white_a body_n call_v ash_n which_o contain_v a_o substance_n or_o salt_n which_o chemist_n call_v alkali_n what_o the_o particular_a nature_n of_o each_o of_o these_o body_n be_v i_o shall_v not_o here_o examine_v intend_v it_o in_o another_o place_n but_o shall_v rather_o add_v that_o this_o hypothesis_n do_v so_o exact_o agree_v with_o all_o phaenomena_n of_o fire_n and_o so_o genuine_o explicate_v each_o particular_a circumstance_n that_o i_o have_v hitherto_o observe_v that_o it_o be_v more_o than_o probable_a that_o this_o cause_n which_o i_o have_v assign_v be_v the_o true_a adequate_a real_a and_o only_a cause_n of_o those_o phenomena_n and_o therefore_o i_o shall_v proceed_v a_o little_a further_o to_o show_v the_o nature_n and_o use_n of_o the_o air._n ten_o therefore_o the_o dissolve_v part_n of_o the_o air_n be_v but_o few_o that_o be_v it_o seem_v of_o the_o nature_n of_o those_o saline_n menstruum_n or_o spirit_n that_o have_v very_o much_o phlegm_n mix_v with_o the_o spirit_n and_o therefore_o a_o small_a parcel_n of_o it_o be_v quick_o glut_v and_o will_v dissolve_v no_o more_o and_o therefore_o unless_o some_o fresh_a part_n of_o this_o menstruum_fw-la be_v apply_v to_o the_o body_n to_o be_v dissolve_v the_o action_n cease_v and_o the_o body_n leave_v to_o be_v dissolve_v and_o to_o shine_v which_o be_v the_o indication_n of_o it_o though_o place_v or_o keep_v in_o the_o great_a heat_n whereas_o saltpetre_n be_v a_o menstruum_fw-la when_o melt_v and_o red-hot_a that_o abound_v more_o with_o those_o dissolvent_a particle_n and_o therefore_o as_o a_o small_a quantity_n of_o it_o will_v dissolve_v a_o great_a sulphureous_a body_n so_o will_v the_o dissolution_n be_v very_o quick_a and_o violent_a therefore_o in_o the_o eleven_o place_n it_o be_v observable_a that_o as_o in_o other_o solution_n if_o a_o copious_a and_o quick_a supply_n of_o fresh_a menstruum_fw-la though_o but_o weak_a he_o pour_v on_o or_o apply_v to_o the_o dissoluble_a body_n it_o quick_o consume_v it_o so_o this_o menstruum_fw-la of_o the_o air_n if_o by_o bellows_o or_o any_o other_o such_o contrivance_n it_o be_v copious_o apply_v to_o the_o shine_a body_n be_v find_v to_o dissolve_v it_o as_o soon_o and_o as_o violent_o as_o the_o more_o strong_a menstruum_fw-la of_o melt_a nitre_n therefore_o twelfthly_a it_o seem_v reasonable_a to_o think_v that_o there_o be_v no_o such_o thing_n as_o a_o element_n of_o fire_n that_o shall_v attract_v or_o draw_v up_o the_o flame_n or_o towards_o which_o the_o flame_n shall_v endeavour_v to_o ascend_v out_o of_o a_o desire_n or_o appetite_n of_o unite_n with_o that_o as_o its_o homogeneal_a primitive_a and_o generate_a element_n but_o that_o that_o shine_a transient_a body_n which_o we_o call_v flame_n be_v nothing_o else_o but_o a_o mixture_n of_o air_n and_o volatile_a sulphureous_a part_n of_o dissoluble_a or_o combustible_a body_n which_o be_v act_v upon_o each_o other_o while_o they_o ascend_v that_o be_v flame_n seem_v to_o be_v a_o mixture_n of_o air_n and_o the_o combustible_a volatile_a part_n of_o any_o body_n which_o part_v the_o encompass_v air_n do_v dissolve_v or_o work_v upon_o which_o action_n as_o it_o do_v intend_v the_o heat_n of_o the_o aerial_a part_n of_o the_o dissolvent_a so_o do_v it_o thereby_o further_o rarify_v those_o part_n that_o be_v act_v or_o that_o be_v very_a near_o they_o whereby_o they_o grow_v much_o light_a than_o the_o heavy_a part_n of_o that_o menstruum_fw-la that_o be_v more_o remote_a be_v thereby_o protrude_v and_o drive_v upward_o and_o this_o may_v be_v easy_o observe_v also_o in_o dissolution_n make_v by_o any_o other_o menstruum_fw-la especial_o such_o as_o either_o create_v heat_n or_o bubble_n now_o this_o action_n of_o the_o menstuum_fw-la or_o air_n on_o the_o dissoluble_a part_n be_v make_v with_o such_o violence_n or_o be_v such_o that_o it_o impart_v such_o a_o motion_n or_o pulse_n to_o the_o diaphanous_a part_n of_o the_o air_n as_o i_o have_v elsewhere_o show_v be_v requisite_a to_o produce_v light_n this_o hypothesis_n i_o have_v endeavour_v to_o raise_v from_o a_o infinite_a of_o observation_n and_o experiment_n the_o process_n of_o which_o will_v be_v much_o too_o long_o to_o be_v here_o insert_v and_o will_v perhaps_o another_o time_n afford_v matter_n copious_a enough_o for_o a_o much_o large_a discourse_n the_o air_n be_v a_o subject_a which_o though_o all_o the_o world_n have_v hitherto_o live_v and_o breathe_v in_o and_o be_v unconversant_a about_o have_v yet_o be_v so_o little_a true_o examine_v or_o explain_v that_o a_o diligent_a enquirer_n will_v be_v able_a to_o find_v but_o very_o little_a information_n from_o what_o have_v be_v till_o of_o late_a write_v of_o it_o but_o be_v once_o well_o understand_v it_o will_v i_o doubt_v not_o enable_v a_o man_n to_o render_v a_o intelligible_a nay_o probable_a if_o not_o the_o true_a reason_n of_o all_o the_o phaenomena_n of_o fire_n which_o as_o it_o have_v be_v find_v by_o writer_n and_o philosopher_n of_o all_o age_n a_o matter_n of_o no_o small_a difficulty_n as_o may_v be_v sufficient_o understand_v by_o their_o strange_a hypothesis_n and_o unintelligible_a solution_n of_o some_o few_o phaenomena_n of_o it_o so_o will_v it_o prove_v a_o matter_n of_o no_o small_a concern_v and_o use_v in_o humane_a affair_n as_o i_o shall_v elsewhere_o endeavour_v to_o manifest_v when_o i_o come_v to_o show_v the_o use_n of_o the_o air_n in_o respiration_n and_o for_o the_o preservation_n of_o the_o life_n nay_o for_o the_o conservation_n and_o restauration_n of_o the_o health_n and_o natural_a constitution_n of_o mankind_n as_o well_o as_o all_o other_o aereal_a animal_n as_o also_o the_o use_n of_o this_o principle_n or_o propriety_n of_o the_o air_n in_o chemical_a mechanical_a and_o other_o operation_n in_o this_o place_n i_o have_v only_a time_n to_o hint_n a_o hypothesis_n which_o if_o god_n permit_v i_o life_n and_o opportunity_n i_o may_v elsewhere_o prosecute_v improve_v and_o publish_v in_o the_o mean_a time_n before_o i_o finish_v this_o discourse_n i_o must_v not_o forget_v to_o acquaint_v the_o reader_n that_o have_v have_v the_o liberty_n grant_v i_o of_o make_v some_o trial_n on_o a_o piece_n of_o lignum_fw-la fossil_v show_v to_o the_o royal_a society_n by_o the_o eminent_o ingenious_a and_o learned_a physician_n doctor_n ent_n who_o receive_v it_o for_o a_o present_a from_o the_o famous_a ingenioso_n cavaliero_n de_fw-fr pozzi_n it_o be_v one_o of_o the_o fair_a and_o best_a piece_n of_o lignum_fw-la fossil_v he_o have_v see_v have_v i_o say_v take_v a_o small_a piece_n of_o this_o wood_n and_o examine_v it_o i_o find_v it_o to_o burn_v in_o the_o open_a air_n almost_o like_o other_o wood_n and_o instead_o of_o a_o resinous_a smoke_n or_o fume_n it_o yield_v a_o very_a bituminous_a one_o smell_v much_o of_o that_o kind_n of_o scent_n but_o that_o which_o i_o chief_o take_v notice_n of_o be_v that_o cut_v off_o a_o small_a piece_n of_o it_o about_o the_o bigness_n of_o my_o thumb_n and_o char_v it_o in_o a_o crucible_n with_o sand_n after_o the_o manner_n i_o above_o prescribe_v i_o find_v it_o infinite_o to_o abound_v with_o the_o small_a sort_n of_o pore_n so_o extreme_a thick_a and_o so_o regular_o perforate_n the_o substance_n of_o it_o long-way_n that_o break_v it_o off_o across_o i_o find_v it_o to_o look_v very_o like_o a_o honeycomb_n but_o as_o for_o any_o of_o the_o second_o or_o big_a kind_n of_o pore_n i_o can_v not_o find_v that_o it_o have_v any_o so_o that_o it_o seem_v whatever_o be_v the_o cause_n of_o its_o production_n it_o be_v not_o without_o those_o small_a kind_n of_o pore_n which_o we_o have_v only_o hitherto_o find_v in_o vegetable_a body_n and_o compare_v they_o with_o the_o pore_n which_o i_o have_v find_v in_o the_o charcoal_n that_o i_o by_o this_o mean_v make_v of_o several_a other_o kind_n of_o wood_n i_o find_v it_o resemble_v none_o so_o much_o as_o those_o of_o fir_n to_o which_o it_o be_v not_o much_o unlike_a in_o grain_n also_o and_o several_a other_o propriety_n schem_n x._o obseru._n xvii_o of_o petrified_a wood_n and_o other_o petrified_a body_n of_o this_o sort_n of_o substance_n i_o observe_v several_a piece_n of_o very_o differ_v kind_n both_o for_o their_o outward_a shape_n colour_n grain_n texture_n hardness_n etc._n etc._n some_o be_v brown_a and_o reddish_a other_o gray_a like_o a_o hone_n other_o
some_o deluge_n inundation_n earthquake_n or_o some_o such_o other_o mean_n come_v to_o be_v throw_v to_o that_o place_n and_o there_o to_o be_v fill_v with_o some_o kind_n of_o mudd_n or_o day_n or_o petrify_a water_n or_o some_o other_o substance_n which_o in_o tract_n of_o time_n have_v be_v settle_v together_o and_o harden_a in_o those_o shelly_a mould_n into_o those_o shape_a substance_n we_o now_o find_v they_o that_o the_o great_a and_o thin_a end_n of_o these_o shell_n by_o that_o earthquake_n or_o what_o ever_o other_o extraordinary_a cause_n it_o be_v that_o bring_v they_o thither_o be_v break_v off_o and_o that_o many_o other_o be_v otherwise_o break_v bruise_a and_o disfigure_v that_o these_o shell_n which_o be_v thus_o spirally_v and_o separate_v with_o diaphragme_n be_v some_o kind_n of_o nautili_n or_o porcelain_n shell_n and_o that_o other_o be_v shell_n of_o cockle_n muscle_n periwinkle_n scolops_n etc._n etc._n of_o various_a sort_n that_o these_o shell_n in_o many_o 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i_o have_v almost_o think_v my_o former_a observation_n deficient_a though_o indeed_o upon_o further_a examination_n i_o have_v find_v even_o those_o also_o to_o confirm_v they_o these_o thread_n therefore_o i_o find_v to_o be_v a_o congery_n of_o small_a laminae_fw-la or_o plate_n as_o e_o e_o e_o e_o e_o etc._n etc._n each_o of_o they_o shape_v much_o like_o this_o of_o a_o b_o c_o d_o in_o the_o four_o figure_n the_o part_n a_o c_o be_v a_o ridge_n prominency_n or_o stem_n and_o b_o and_o d_o the_o corner_n of_o two_o small_a thin_a plate_n that_o grow_v unto_o the_o small_a stalk_n in_o the_o middle_n so_o that_o they_o make_v a_o kind_n of_o little_a feather_n each_o of_o these_o plate_n lie_v one_o close_a to_o another_o almost_o like_o a_o company_n of_o slope_v ridge_n or_o gutter_n tile_n they_o grow_v on_o each_o side_n of_o the_o stalk_n opposite_a to_o one_o another_o by_o two_o and_o two_o from_o top_n to_o bottom_n in_o the_o manner_n express_v in_o the_o five_o figure_n 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earth_n three_o it_o be_v not_o unlikely_a but_o that_o suppose_v such_o a_o sandy_a or_o moulder_a substance_n to_o be_v there_o find_v and_o suppose_v also_o a_o possibility_n of_o the_o generation_n of_o the_o internal_a elastical_a body_n whether_o you_o will_v call_v it_o air_n or_o vapour_n it_o be_v not_o unlikely_a i_o say_v but_o that_o there_o be_v in_o the_o moon_n a_o principle_n of_o gravitation_n such_o as_o in_o the_o earth_n and_o to_o make_v this_o probable_a i_o think_v we_o need_v no_o better_a argument_n than_o the_o roundness_n or_o globular_a figure_n of_o the_o body_n of_o the_o moon_n itself_o which_o we_o may_v perceive_v very_o plain_o by_o the_o telescope_n to_o be_v bate_v the_o small_a inequality_n of_o the_o hill_n and_o vale_n in_o it_o which_o be_v all_o of_o they_o likewise_o shape_v or_o level_v as_o it_o be_v to_o answer_v to_o the_o centre_n of_o the_o moon_n body_n perfect_o of_o a_o spherical_a figure_n that_o be_v all_o the_o part_n of_o it_o be_v 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how_o all_o the_o circumstance_n notable_a in_o the_o shape_n of_o the_o superficial_a part_n be_v as_o it_o be_v exact_o adapt_v to_o suit_n with_o such_o a_o principle_n will_n if_o he_o well_o consider_v the_o usual_a method_n of_o nature_n in_o its_o other_o proceed_n find_v abundant_a argument_n to_o believe_v it_o to_o have_v real_o there_o also_o such_o a_o principle_n for_o i_o can_v never_o observe_v among_o all_o the_o mountainous_a or_o prominent_a part_n of_o the_o moon_n whereof_o there_o be_v a_o huge_a variety_n that_o any_o one_o part_n of_o it_o be_v place_v in_o such_o a_o manner_n that_o if_o there_o shall_v be_v a_o gravitate_v or_o attract_v principle_n in_o the_o body_n of_o the_o moon_n it_o will_v make_v that_o part_n to_o fall_v or_o be_v move_v out_o of_o its_o visible_a posture_n next_o the_o shape_n and_o position_n of_o the_o part_n be_v such_o that_o they_o all_o seem_v put_v into_o those_o very_a shape_n they_o be_v in_o by_o a_o gravitating_a power_n 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vale_n also_o in_o many_o be_v much_o shape_v like_o those_o of_o the_o earth_n and_o i_o be_o apt_a to_o think_v that_o can_v we_o look_v upon_o the_o earth_n from_o the_o moon_n with_o a_o good_a telescope_n we_o may_v easy_o enough_o perceive_v its_o surface_n to_o be_v very_o much_o like_o that_o of_o the_o moon_n now_o whereas_o in_o this_o small_a draught_n as_o there_o will_v be_v multitude_n if_o the_o whole_a moon_n be_v draw_v after_o this_o manner_n there_o be_v several_a little_a ebullition_n or_o dish_n even_o in_o the_o vale_n themselves_o and_o in_o the_o encompass_v hill_n also_o this_o will_n from_o this_o supposition_n which_o i_o have_v i_o think_v upon_o very_o good_a reason_n take_v be_v exceed_v easy_o explicable_a for_o as_o i_o have_v several_a time_n also_o observe_v in_o the_o surface_n of_o alabaster_n so_o order_v as_o i_o before_o describe_v so_o may_v the_o late_a eruption_n of_o vapour_n be_v even_o in_o the_o middle_n or_o on_o the_o edge_n of_o the_o former_a and_o other_o succeed_a these_o also_o in_o time_n may_v be_v in_o the_o middle_n or_o edge_n of_o these_o etc._n etc._n of_o which_o there_o be_v instance_n enough_o in_o divers_a part_n of_o the_o body_n of_o the_o moon_n and_o by_o a_o boil_a pot_n of_o alabaster_n will_v be_v sufficient_o exemplify_v to_o conclude_v therefore_o it_o be_v very_o probable_a that_o the_o moon_n have_v a_o principle_n of_o gravitation_n it_o afford_v a_o excellent_a distinguish_a instance_n in_o the_o search_n after_o the_o cause_n of_o gravitation_n or_o attraction_n to_o hint_n that_o it_o do_v not_o depend_v upon_o the_o diurnal_a or_o turbinated_a motion_n of_o the_o earth_n as_o some_o have_v somewhat_o inconsiderate_o suppose_v and_o affirm_v it_o to_o do_v for_o if_o the_o moon_n have_v a_o attractive_a principle_n whereby_o it_o be_v not_o only_o shape_v round_o but_o do_v firm_o contain_v and_o hold_v all_o its_o part_n unite_v though_o many_o of_o they_o seem_v as_o loose_v as_o the_o sand_n on_o the_o earth_n and_o that_o the_o moon_n be_v not_o move_v about_o its_o centre_n then_o certain_o the_o turbination_n can_v be_v the_o cause_n of_o the_o attraction_n of_o the_o earth_n and_o therefore_o some_o other_o principle_n must_v be_v think_v of_o that_o will_v agree_v with_o all_o the_o secundary_a as_o well_o as_o primary_n planet_n but_o this_o i_o confess_v be_v but_o a_o probability_n and_o not_o a_o demonstration_n which_o from_o any_o observation_n yet_o make_v it_o seem_v hardly_o capable_a of_o though_o how_o successful_a future_a endeavour_n promote_v by_o the_o meliorate_n of_o glass_n and_o observe_v particular_a circumstance_n may_v be_v in_o this_o or_o any_o other_o kind_a must_v be_v with_o patience_n expect_v finis_fw-la the_o table_n observat._n 1._o of_o the_o point_n of_o a_o needle_n a_o description_n of_o it_o what_o other_o body_n have_v the_o sharp_a point_n of_o the_o ruggedness_n of_o polish_a metal_n a_o description_n of_o a_o print_a point_n of_o very_o small_a writing_n and_o the_o use_n of_o it_o for_o secret_a intelligence_n the_o cause_n of_o the_o coursness_n of_o print_a line_n and_o point_n obseru._n 2._o of_o the_o edge_n of_o a_o razor_n a_o description_n of_o it_o the_o cause_n of_o its_o roughness_n of_o the_o roughness_n of_o very_a well_o polish_a optic_a glass_n obser._n 3_o of_o fine_a lawn_n a_o description_n of_o it_o a_o silken_a flax_n mention_v a_o attempt_n to_o explicate_v the_o phaenomena_n of_o it_o with_o a_o conjecture_n at_o the_o cause_n of_o the_o gloss_n of_o silk_n obseru._n 4._o of_o tabby_n a_o short_a description_n of_o it_o a_o conjecture_n about_o the_o reason_n why_o silk_n be_v so_o susceptible_a of_o vivid_v colour_n and_o why_o flax_n and_o hair_n be_v not_o a_o conjecture_n that_o it_o may_v perhaps_o be_v possible_a to_o spin_v
a_o kind_n of_o artificial_a silk_n out_o of_o some_o glutinous_a substance_n that_o may_v equalise_v natural_a silk_n obseru._n 5._o of_o water_a silk_n the_o great_a unaccurateness_n of_o artificial_a work_n a_o description_n of_o a_o piece_n of_o water_a silk_n a_o explication_n of_o the_o cause_n of_o the_o phaenomena_n the_o way_n by_o which_o that_o operation_n be_v perform_v some_o other_o phaenomena_n mention_v depend_v on_o the_o same_o cause_n obseru._n 6._o of_o glass-cane_n the_o exceed_a smallness_n of_o some_o of_o these_o body_n by_o what_o mean_v the_o hollowness_n of_o these_o small_a pipe_n be_v discover_v several_a phaenomena_n of_o it_o mention_v a_o attempt_n to_o explicate_v they_o from_o the_o congruity_n and_o incongruity_n of_o body_n what_o those_o propriety_n be_v a_o hypothetical_a explication_n of_o fluidity_n of_o the_o fluidity_n of_o the_o air_n and_o several_a other_o phaenomena_n of_o it_o of_o congruity_n &_o incongruity_n illustrate_v with_o several_a experiment_n what_o effect_n may_v be_v ascribe_v to_o these_o property_n a_o explication_n of_o the_o roundness_n of_o the_o surface_n of_o fluid_a body_n how_o the_o ingress_n of_o fluid_a body_n into_o a_o small_a hole_n of_o a_o heterogeneous_a body_n be_v hinder_v by_o incongruity_n a_o multitude_n of_o phaenomena_n explicable_a hereby_o several_a query_n propound_v 1._o concern_v the_o propagation_n of_o light_n through_o differ_v medium_n 2._o concern_v gravity_n 3._o concern_v the_o roundness_n of_o the_o sun_n moon_n and_o planet_n 4._o concern_v the_o roundness_n of_o fruit_n stone_n and_o divers_a artificial_a body_n his_o highness_n prince_n rupert_n way_n of_o make_v shoot_v of_o the_o roundness_n of_o hail_n of_o the_o grain_n of_o kettering_n stone_n and_o of_o the_o spark_n of_o fire_n 5._o concern_v springiness_n and_o tenacity_n 6._o concern_v the_o original_n of_o fountain_n several_a history_n and_o experiment_n relate_v thereto_o 7._o concern_v the_o dissolution_n of_o body_n in_o liquor_n 8._o concern_v the_o universality_n of_o this_o principle_n what_o method_n be_v take_v in_o make_v and_o apply_v experiment_n the_o explication_n of_o filtration_n and_o several_a other_o phaenomena_n such_o as_o the_o motion_n of_o body_n on_o the_o surface_n of_o liquor_n several_a experiment_n mention_v to_o this_o purpose_n of_o the_o height_n to_o which_o the_o water_n may_v rise_v in_o these_o pipe_n and_o a_o conjecture_n about_o the_o juice_n of_o vegetable_n &_o the_o use_n of_o their_o pore_n a_o further_a explication_n of_o congruity_n and_o a_o attempt_n of_o solve_v the_o phaenomena_n of_o the_o strange_a experiment_n of_o the_o suspension_n of_o the_o mercury_n at_o a_o much_o great_a height_n than_o thirty_o inch_n the_o efficacy_n of_o immediate_a contact_n and_o the_o reason_n of_o it_o obseru._n 7._o of_o glass_n drop_n several_a experiment_n make_v with_o these_o small_a body_n the_o manner_n of_o the_o break_n and_o flaw_v of_o they_o explicate_v by_o figure_n what_o other_o body_n will_v be_v flaw_v much_o in_o the_o same_o manner_n some_o other_o trial_n and_o a_o description_n of_o the_o drop_v themselves_o some_o conjecture_n at_o the_o cause_n of_o the_o phaenomena_n endeavour_v to_o be_v make_v probable_a by_o several_a argument_n and_o experiment_n a_o experiment_n of_o the_o expansion_n of_o water_n by_o heat_n and_o shrink_v by_o cold_a the_o like_a propriety_n suppose_v in_o glassdrop_v and_o what_o effect_n proceed_v from_o they_o the_o seven_o proposition_n on_o which_o the_o conjecture_n be_v ground_v experiment_n to_o show_v that_o body_n expand_v by_o heat_n the_o manner_n of_o make_v thermometer_n and_o the_o instrument_n for_o graduate_v they_o the_o manner_n of_o graduate_v they_o and_o their_o use_n other_o experiment_n to_o prove_v the_o expansion_n of_o body_n by_o heat_n four_o experimental_a argument_n to_o prove_v the_o expansion_n of_o glass_n by_o heat_n further_o prove_v by_o the_o experiment_n of_o boil_a alabaster_n which_o be_v explicate_v a_o explication_n of_o the_o contract_n of_o heat_a glass_n upon_o cool_v a_o explication_n how_o the_o part_n of_o the_o glass_n become_v bend_v by_o sudden_a cold_a and_o how_o keep_v from_o extricate_a themselves_o by_o the_o contignation_n of_o the_o glass_n drop_n which_o be_v further_o explicate_v by_o another_o experiment_n make_v with_o a_o hollow_a glass_n ball_n the_o reason_n of_o the_o fly_v asunder_o of_o the_o part_n further_o explicate_v that_o it_o be_v probable_a these_o body_n may_v have_v many_o flaw_n though_o not_o visible_a and_o why_o how_o a_o gradual_a heat_n and_o cool_a do_v put_v the_o part_n of_o glass_n and_o other_o harden_a body_n into_o a_o loose_a texture_n obseru._n 8._o of_o fiery_a spark_n the_o occasion_n and_o manner_n of_o make_v this_o experiment_n divers_a observation_n set_v down_o in_o order_n to_o the_o find_v out_o the_o reason_n some_o conjecture_n concern_v it_o which_o be_v endeavour_v to_o be_v explicate_v and_o confirm_v by_o several_a experiment_n and_o reason_n the_o hypothesis_n a_o little_a further_o explicate_v some_o observation_n about_o the_o globular_a figure_n and_o a_o experiment_n of_o reduce_v the_o file_n of_o tin_n or_o lead_v to_o exact_o round_a globule_n obseru._n 9_o of_o fantastical_a colour_n the_o texture_n of_o muscovy_n glass_n its_o figure_n what_o other_o body_n be_v like_o it_o that_o it_o exhibit_v several_a colour_n and_o how_o several_a observation_n and_o experiment_n about_o those_o colour_n the_o reason_n why_o on_o this_o occasion_n the_o nature_n of_o colour_n be_v inquire_v into_o a_o conjecture_n at_o the_o reason_n of_o these_o colour_n explicate_v by_o several_a experiment_n and_o reason_n first_o by_o continual_a cleave_v the_o body_n till_o it_o become_v colour_v second_o by_o produce_v all_o kind_n of_o colour_n with_o two_o flat_a plate_n of_o glass_n three_o by_o blow_v glass_n so_o thin_a in_o the_o lamp_n till_o it_o produce_v the_o same_o effect_n four_o by_o do_v the_o same_o with_o bubble_n of_o divers_a other_o transparent_a body_n the_o reason_n of_o the_o colour_n on_o nealed_a steel_n where_o by_o the_o way_n the_o cause_n of_o the_o harden_v and_o temper_v of_o steel_n endeavour_v to_o be_v show_v and_o explicate_v by_o several_a reason_n and_o experiment_n the_o reason_n of_o the_o colour_n on_o lead_n brass_n copper_n silver_n etc._n etc._n other_o instance_n of_o such_o colour_a body_n in_o animal_n substance_n several_a other_o distinguish_a observation_n des_fw-mi cartes_n hypothesis_n of_o colour_n examine_v a_o hypothesis_n for_o the_o explication_n of_o light_n by_o motion_n endeavour_v to_o be_v explicate_v and_o determine_v by_o several_a reason_n and_o experiment_n three_o distinguish_a property_n of_o the_o motion_n of_o light_n the_o distinguish_a property_n of_o a_o transparent_a medium_fw-la that_o there_o seem_v to_o be_v no_o experiment_n that_o prove_v the_o instantaneous_a motion_n of_o light_n the_o manner_n of_o the_o propagation_n of_o light_n through_o they_o of_o the_o homogeniety_n and_o heterogeniety_n of_o transparent_a medium_n and_o what_o effect_n they_o cause_n on_o the_o ray_n of_o light_n explicate_v by_o a_o figure_n a_o examination_n of_o the_o refraction_n of_o the_o ray_n by_o a_o plain_a surface_n which_o cause_v colour_n a_o examination_n of_o the_o like_a effect_n produce_v by_o a_o spherical_a surface_n the_o use_n that_o may_v be_v make_v of_o these_o experiment_n for_o the_o examination_n of_o several_a hyphothese_n of_o colour_n des_fw-mi cartes_n hypothesis_n examine_v some_o difficulty_n take_v notice_n of_o in_o it_o what_o seem_v most_o likely_a to_o be_v the_o cause_n of_o colour_n that_o propriety_n be_v endeavour_v to_o be_v show_v in_o a_o glass_n ball_n that_o the_o reflection_n be_v not_o necessary_a to_o produce_v colour_n nor_o a_o double_a refraction_n the_o hypothesis_n further_o examine_v both_o in_o the_o pellucid_n medium_fw-la and_o in_o the_o eye_n the_o definition_n of_o colour_n and_o a_o further_a explication_n and_o examination_n of_o the_o propriety_n of_o laminated_a body_n by_o what_o mean_v they_o conduce_v to_o the_o production_n of_o colour_n obseru._n 10._o of_o metalline_a colour_n that_o all_o colour_n seem_v to_o be_v cause_v by_o refraction_n a_o hypothesis_n consonant_n hereunto_o explicate_v by_o figure_n how_o several_a experiment_n of_o the_o sudden_a change_n of_o colour_n by_o chemical_a liquor_n may_v be_v hereby_o explicate_v how_o many_o way_n such_o chemical_a liquor_n may_v alter_v the_o colour_n of_o body_n objection_n make_v against_o this_o hypothesis_n of_o two_o colour_n only_o endeavour_v to_o be_v answer_v by_o several_a reason_n and_o experiment_n the_o reason_n why_o some_o colour_n be_v capable_a of_o be_v dilute_v other_o not_o what_o those_o be_v that_o probable_o the_o particle_n of_o most_o metalline_a colour_n be_v transparent_a for_o this_o several_a argument_n and_o observation_n be_v recite_v how_o colour_n become_v incapable_a of_o dilute_v explicate_v by_o
a_o similitude_n a_o instrument_n by_o which_o one_o and_o the_o same_o colour_a liquor_n at_o once_o exhibit_v all_o the_o degree_n of_o colour_n between_o the_o pale_a yellow_a and_o deep_a red_n as_o likewise_o another_o that_o exhibit_v all_o variety_n of_o blue_n several_a experiment_n try_v with_o these_o box_n a_o objection_n draw_v from_o the_o nature_n of_o painter_n colour_n answer_v that_o dilute_v and_o whiten_v a_o colour_n be_v different_a operation_n as_o be_v deepen_v and_o blacken_a why_o some_o may_v be_v dilute_v by_o grind_v and_o some_o other_o by_o be_v temper_v with_o oil_n several_a experiment_n for_o the_o explicate_a of_o some_o former_a assertion_n why_o painter_n be_v force_v to_o make_v use_n of_o many_o colour_n what_o those_o colour_n be_v and_o how_o mix_v the_o conclusion_n that_o most_o colour_a body_n seem_v to_o consist_v of_o transparent_a particle_n that_o all_o colour_n dissoluble_a in_o liquor_n be_v capable_a of_o dilute_v some_o of_o mix_v what_o a_o strange_a variety_n may_v thereby_o be_v produce_v obseru._n 11._o of_o the_o figure_n of_o sand._n of_o the_o substance_n and_o shape_n of_o common_a and_o other_o sand_n a_o description_n of_o a_o very_a small_a shell_n obseru._n 12._o of_o gravel_n in_o urine_n a_o description_n of_o such_o gravel_n and_o some_o trial_n make_v with_o it_o and_o conjecture_n at_o its_o cause_n obser._n 13._o of_o diamond_n in_o flint_n a_o description_n and_o examination_n of_o some_o of_o they_o explicate_v further_o by_o cornish_a diamond_n several_a observation_n about_o reflection_n and_o refraction_n and_o some_o deduction_n therefrom_o as_o a_o explication_n of_o whiteness_n that_o the_o air_n have_v a_o strong_a reflection_n than_o water_n how_o several_a body_n may_v be_v make_v transparent_a a_o explication_n of_o the_o phaenomena_n of_o oculus_fw-la mundi_fw-la of_o the_o regular_a geometrical_a figure_n of_o several_a body_n a_o hypothetical_a explication_n mention_v the_o method_n of_o prosecute_a this_o inquiry_n observe_v 14._o of_o freeze_a figure_n the_o figure_n of_o hoar_a frost_n and_o the_o vertices_fw-la on_o window_n several_a observation_n on_o the_o branch_a figure_n of_o urine_n the_o figure_n of_o regulus_n martis_n stellatus_fw-la and_o of_o fern._n of_o the_o figure_n of_o snow_n of_o freeze_a water_n obseru._n 15._o of_o kettering_n stone_n a_o description_n of_o the_o figure_n of_o the_o particle_n and_o of_o the_o pore_n and_o of_o the_o contexture_n several_a observation_n and_o consideration_n thereupon_o some_o conjecture_n about_o the_o medium_n and_o propagation_n of_o light_n and_o the_o constitution_n of_o fluid_a and_o transparent_a body_n several_a experiment_n to_o prove_v the_o porousness_n of_o â—marble_n and_o some_o other_o stone_n a_o account_n of_o some_o experiment_n to_o this_o purpose_n make_v on_o a_o oculus_fw-la mundi_fw-la some_o other_o consideration_n and_o experiment_n about_o the_o porousness_n of_o body_n some_o other_o consideration_n about_o the_o propagation_n of_o light_n and_o refraction_n obseru._n 16._o of_o charcoal_n of_o two_o sort_n of_o pore_n to_o be_v find_v in_o all_o wood_n and_o vegetable_n the_o shape_n of_o they_o the_o number_n thickness_n manner_n and_o use_n of_o these_o pore_n a_o explication_n of_o the_o phaenomena_n of_o coal_n the_o manner_n of_o char_a wood_n or_o any_o other_o body_n what_o part_n of_o wood_n be_v combustible_a a_o hypothesis_n of_o fire_n explicate_v in_o twelve_o particular_n wherein_o the_o action_n of_o the_o air_n as_o a_o menstruum_fw-la in_o the_o dissolution_n of_o all_o sulphureous_a body_n be_v very_o particular_o explicate_v and_o some_o other_o consideration_n about_o the_o air_n propose_v the_o examination_n of_o a_o piece_n of_o lignum_fw-la fossil_v send_v from_o rome_n and_o some_o conclusion_n thence_o deduce_v obseru._n 17._o of_o wood_n and_o other_o body_n petrify_v several_a observation_n of_o divers_a kind_n of_o these_o substance_n a_o more_o particular_a examination_n and_o explication_n of_o one_o very_o notable_a piece_n of_o petrified_a wood_n and_o some_o conjecture_n about_o the_o cause_n of_o those_o production_n several_a observation_n make_v on_o other_o petrified_a body_n as_o shell_n etc._n etc._n and_o some_o probable_a conclusion_n thence_o deduce_v about_o the_o original_a cause_n of_o those_o body_n obseru._n 18._o of_o the_o pore_n of_o cork_n and_o other_o body_n several_a observation_n and_o consideration_n about_o the_o nature_n of_o cork_n the_o number_n of_o pore_n in_o a_o cubical_a inch_n and_o several_a consideration_n about_o pore_n several_a experiment_n and_o observation_n about_o the_o nature_n of_o cork_n the_o texture_n and_o pore_n of_o the_o pith_n of_o a_o elder_a and_o several_a other_o tree_n of_o the_o stalk_n of_o burdock_n teasel_n daisy_n carrot_n fennel_n ferne_n reed_n etc._n etc._n of_o the_o frothy_a texture_n of_o the_o pith_n of_o a_o feather_n some_o conjecture_n about_o the_o probability_n of_o value_n in_o these_o pore_n argue_v also_o from_o the_o phaenomena_n of_o the_o sensible_a and_o humble_a plant_n some_o observation_n on_o which_o be_v insert_v obseru._n 19_o of_o a_o vegetable_a grow_v on_o blighted_a leave_n several_a observation_n and_o examination_n make_v of_o they_o several_a consideration_n about_o spontaneous_a generation_n arise_v from_o the_o putrefaction_n of_o body_n obseru._n 20._o of_o blue_a mould_n and_o mushroom_n the_o description_n of_o several_a kind_n of_o mould_v the_o method_n of_o proceed_v in_o natural_a inquiry_n several_a consideration_n about_o the_o nature_n of_o mould_n and_o mushroom_n 1._o that_o they_o may_v be_v produce_v without_o seed_n 2._o that_o they_o seem_v to_o have_v none_o 3._o that_o salt_n etc._n etc._n be_v shape_v into_o as_o curious_a figure_n without_o a_o seed_n 4._o of_o a_o kind_n of_o mushroom_n grow_v in_o a_o candle_n a_o more_o particular_a explication_n of_o this_o last_o sort_n of_o mushroom_n 5._o of_o the_o figure_n and_o manner_n of_o the_o production_n of_o petrified_a iceicle_n several_a deduction_n from_o these_o consideration_n about_o the_o nature_n of_o the_o vegetation_n of_o mould_n and_o mushroom_n obseru._n 21._o of_o moss_n the_o description_n of_o several_a sort_n of_o mosses_n upon_o this_o occasion_n several_a conjecture_n about_o the_o manner_n of_o the_o production_n of_o these_o kind_n of_o body_n be_v hint_v and_o some_o of_o they_o explicate_v by_o a_o similitude_n take_v from_o a_o piece_n of_o clockwork_n the_o vast_a difference_n of_o the_o bigness_n of_o vegetable_a body_n and_o the_o probability_n that_o the_o least_o may_v comprehend_v as_o curious_a contrivance_n as_o the_o great_a of_o multitude_n of_o other_o mould_v mosses_n and_o mushroom_n and_o other_o vegetate_v principle_n in_o water_n wood_n etc._n etc._n obseru._n 22._o of_o sponge_n and_o other_o fibrous_a body_n several_a observation_n and_o conjecture_n about_o the_o make_n of_o these_o body_n and_o several_a history_n out_o of_o author_n scarce_o any_o other_o body_n have_v such_o a_o texture_n the_o fibrous_a texture_n of_o leather_n spunk_n etc._n etc._n which_o be_v there_o describe_v come_v near_a to_o it_o that_o upon_o trial_n with_o a_o piece_n of_o sponge_n and_o oil_n the_o necessity_n of_o respiration_n can_v not_o be_v alter_v obseru._n 23._o of_o the_o form_n of_o seaweed_n from_o the_o curious_o shape_a surface_n of_o this_o seaweed_n and_o some_o other_o be_v conjecture_v the_o possibility_n of_o multitude_n of_o the_o like_a obseru._n 24._o of_o the_o surface_n of_o some_o leave_n the_o description_n 1._o of_o the_o bald_a surface_n of_o leave_n 2._o of_o the_o downy_a surface_n of_o several_a other_o 3._o of_o the_o gummous_a exsudation_n or_o small_a transparent_a pearl_n discover_v with_o a_o microscope_n in_o several_a other_o a_o instance_n of_o all_o which_o be_v afford_v in_o a_o rosemary_n leaf_n obseru._n 25._o of_o the_o sting_a point_n of_o a_o nettle_n a_o description_n of_o the_o needle_n and_o several_a other_o contrivance_n in_o the_o leaf_n of_o a_o nettle_n how_o the_o sting_a pain_n be_v create_v upon_o this_o several_a consideration_n about_o poison_v dart_n be_v set_v down_o a_o experiment_n of_o kill_a eff_n and_o fish_n with_o salt_n some_o conjecture_n at_o the_o efficacy_n of_o bath_n the_o use_n that_o may_v be_v make_v of_o inject_v into_o the_o vein_n a_o very_a remarkable_a history_n out_o of_o bellonius_fw-la and_o some_o consideration_n about_o stain_v and_o die_v of_o body_n obseru._n 26._o of_o cowage_n the_o description_n of_o it_o out_o of_o parkinson_n a_o experiment_n make_v of_o it_o a_o description_n and_o some_o conjecture_n at_o the_o cause_n of_o the_o phaenomena_n obseru._n 27._o of_o the_o beard_n of_o a_o wild_a oat_n the_o description_n of_o its_o shape_n and_o property_n the_o manner_n of_o make_v a_o hygroscope_n with_o it_o and_o a_o conjecture_n at_o the_o cause_n of_o these_o motion_n and_o of_o the_o motion_n of_o the_o muscle_n obseru._n 28._o of_o the_o seed_n
or_o any_o other_o creature_n seek_v and_o place_v their_o seed_n in_o convenient_a repository_n we_o may_v if_o we_o attentive_o consider_v and_o examine_v it_o find_v that_o there_o be_v circumstance_n sufficient_a upon_o the_o supposal_n of_o the_o excellent_a contrivance_n of_o their_o machine_n to_o excite_v and_o force_v they_o to_o act_v after_o such_o or_o such_o a_o manner_n those_o steam_n that_o rise_v from_o these_o several_a place_n may_v perhaps_o set_v several_a part_n of_o these_o little_a animal_n at_o work_n even_o as_o in_o the_o contrivance_n of_o kill_v a_o fox_n or_o wolf_n with_o a_o gun_n the_o move_a of_o a_o string_n be_v the_o death_n of_o the_o animal_n for_o the_o beast_n by_o move_v the_o flesh_n that_o be_v lay_v to_o entrap_v he_o pull_v the_o string_n which_o move_v the_o trig_a and_o that_o le_fw-fr we_o go_v the_o cock_n which_o on_o the_o steel_n strike_v certain_a spark_n of_o fire_n which_o kindle_v the_o powder_n in_o the_o pann_n and_o that_o present_o fly_v into_o the_o barrel_n where_o the_o powder_n catch_v fire_n ratify_v and_o drive_v out_o the_o bullet_n which_o kill_v the_o animal_n in_o all_o which_o action_n there_o be_v nothing_o of_o intention_n or_o ratiocination_n to_o be_v ascribe_v either_o to_o the_o animal_n or_o engine_n but_o all_o to_o the_o ingeniousness_n of_o the_o contriver_n but_o to_o return_v to_o the_o more_o immediate_a consideration_n of_o our_o gnat_n we_o have_v in_o it_o a_o instance_n not_o usual_a or_o common_a of_o a_o very_a strange_a amphibious_a creature_n that_o be_v a_o creature_n that_o inhabit_v the_o air_n do_v yet_o produce_v a_o creature_n that_o for_o some_o time_n live_v in_o the_o water_n as_o a_o fish_n though_o afterward_o which_o be_v as_o strange_a it_o become_v a_o inhabitant_n of_o the_o air_n like_o its_o sire_n in_o the_o form_n of_o a_o fly_n and_o this_o i_o think_v do_v prompt_v i_o to_o propose_v certain_a conjecture_n as_o query_n have_v not_o yet_o have_v sufficient_a opportunity_n and_o leisure_n to_o answer_v they_o myself_o from_o my_o own_o experiment_n or_o observation_n and_o the_o first_o be_v whether_o all_o those_o thing_n that_o we_o suppose_v to_o be_v breed_v from_o corruption_n and_o putrefaction_n may_v not_o be_v rational_o suppose_v to_o have_v their_o origination_n as_o natural_a as_o these_o gnat_n who_o it_o be_v very_o probable_a be_v first_o drop_v into_o this_o water_n in_o the_o form_n of_o eggs._n those_o seed_n or_o egg_n must_v certain_o be_v very_o small_a which_o so_o small_a a_o creature_n as_o a_o gnat_n yield_v and_o therefore_o we_o need_v not_o wonder_v that_o we_o find_v not_o the_o egg_n themselves_o some_o of_o the_o young_a of_o they_o which_o i_o have_v observe_v have_v not_o exceed_v a_o ten_o part_n of_o the_o bulk_n they_o have_v afterward_o come_v to_o and_o next_o i_o have_v observe_v some_o of_o those_o little_a one_o which_o must_v have_v be_v generate_v after_o the_o water_n be_v enclose_v in_o the_o bottle_n and_o therefore_o most_o probable_o from_o egg_n whereas_o those_o creature_n have_v be_v suppose_v to_o be_v breed_v of_o the_o corruption_n of_o the_o water_n there_o be_v not_o former_o know_v any_o probable_a way_n how_o they_o shall_v be_v generate_v a_o second_o be_v whether_o these_o egg_n be_v immediate_o drop_v into_o the_o water_n by_o the_o gnat_n themselves_o or_o mediate_o be_v bring_v down_o by_o the_o fall_a rain_n for_o it_o seem_v not_o very_o improbable_a but_o that_o those_o small_a seed_n of_o gnat_n may_v be_v perhaps_o of_o so_o light_a a_o nature_n and_o have_v so_o great_a a_o proportion_n of_o surface_n to_o so_o small_a a_o bulk_n of_o body_n be_v eject_v into_o the_o air_n and_o so_o perhaps_o carry_v for_o a_o good_a while_n too_o and_o fro_o in_o it_o till_o by_o the_o drop_n of_o rain_n it_o be_v wash_v out_o of_o it_o a_o three_o be_v whether_o multitude_n of_o those_o other_o little_a creature_n that_o be_v find_v to_o inhabit_v the_o water_n for_o some_o time_n do_v not_o at_o certain_a time_n take_v wing_n and_o fly_v into_o the_o air_n other_o dive_v and_o hide_v themselves_o in_o the_o earth_n and_o so_o contribute_v to_o the_o increase_n both_o of_o the_o one_o and_o the_o other_o element_n postscript_n a_o good_a while_n since_o the_o write_n of_o this_o description_n i_o be_v present_v by_o doctor_n peter_n ball_n a_o ingenious_a member_n of_o the_o royal_a society_n with_o a_o little_a paper_n of_o nut_n which_o he_o tell_v i_o be_v send_v he_o from_o a_o brother_n of_o his_o out_o of_o the_o country_n from_o mamhead_n in_o devonshire_n some_o of_o they_o be_v loose_a have_v be_v as_o i_o suppose_v break_v off_o other_o be_v still_o grow_v fast_o on_o upon_o the_o side_n of_o a_o stick_n which_o seem_v by_o the_o bark_n pliableness_n of_o it_o and_o by_o certain_a string_n that_o grow_v out_o of_o it_o to_o be_v some_o piece_n of_o the_o root_n of_o a_o tree_n they_o be_v all_o of_o they_o dry_v and_o a_o little_a shriveled_a other_o more_o round_a of_o a_o brown_a colour_n their_o shape_n be_v much_o like_o a_o fig_n but_o very_o much_o small_a some_o be_v about_o the_o bigness_n of_o a_o bay-berry_n other_o and_o the_o big_a of_o a_o hazelnut_n some_o of_o these_o that_o have_v no_o hole_n in_o they_o i_o careful_o open_v with_o my_o knife_n and_o find_v in_o they_o a_o good_a large_a round_a white_a maggot_n almost_o as_o big_a as_o a_o small_a pea_n which_o seem_v shape_v like_o other_o maggot_n but_o short_a i_o can_v not_o find_v they_o to_o move_v though_o i_o guess_v they_o to_o be_v alive_a because_o upon_o prick_v they_o with_o a_o pinn_n there_o will_v issue_v out_o a_o great_a deal_n of_o white_a mucous_a matter_n which_o seem_v to_o be_v from_o a_o voluntary_a contraction_n of_o their_o skin_n their_o husk_n or_o matrix_fw-la consist_v of_o three_o coat_n like_o the_o bark_n of_o tree_n the_o outermost_a being_n more_o rough_a and_o spongy_a and_o the_o thick_a the_o middlemost_a more_o close_o hard_a white_a and_o thin_a the_o innermost_a very_o thin_a seem_v almost_o like_o the_o skin_n within_o a_o egg_n be_v shell_n the_o two_o outermost_a have_v root_n in_o the_o branch_n or_o stick_v but_o the_o innermost_a have_v no_o stem_n or_o process_n but_o be_v only_o a_o skin_n that_o cover_v the_o cavity_n of_o the_o nut._n all_o the_o nut_n that_o have_v no_o hole_n eat_v in_o they_o i_o find_v to_o contain_v these_o maggot_n but_o all_o that_o have_v hole_n i_o find_v empty_a the_o maggot_n it_o seem_v have_v eat_v their_o way_n through_o take_v wing_n and_o fly_v away_o as_o this_o follow_a account_n which_o i_o receive_v in_o write_v from_o the_o same_o person_n as_o it_o be_v send_v he_o by_o his_o brother_n manifest_v in_o a_o moorish_a black_a peaty_n mould_n with_o some_o small_a vein_n of_o whitish_a yellow_a sand_n upon_o occasion_n of_o dig_v a_o hole_n two_o or_o three_o foot_n deep_a at_o the_o head_n of_o a_o pond_n or_o pool_n to_o set_v a_o tree_n in_o at_o that_o depth_n be_v find_v about_o the_o end_n of_o october_n 1663._o in_o those_o very_a vein_n of_o sand_n those_o button_n or_o nut_n stick_v to_o a_o little_a loose_a stick_n that_o be_v not_o belong_v to_o any_o live_a tree_n and_o some_o of_o they_o also_o free_a by_o themselves_o four_o or_o five_o of_o which_o be_v then_o open_v some_o be_v find_v to_o contvin_n live_v infect_v come_v to_o perfection_n most_o like_a to_o fly_a ant_n if_o not_o the_o same_o in_o other_o infect_v yet_o imperfect_a have_v but_o the_o head_n and_o wing_n form_v the_o rest_n remain_v a_o soft_a white_a pulpy_a substance_n now_o as_o this_o furnish_v we_o with_o one_o odd_a history_n more_o very_o agreeable_a to_o what_o i_o before_o hint_v so_o i_o doubt_v not_o but_o be_v man_n diligent_a observer_n they_o may_v meet_v with_o multitude_n of_o the_o same_o kind_n both_o in_o the_o earth_n and_o in_o the_o water_n and_o in_o the_o air_n on_o tree_n plant_n and_o other_o vegetable_n all_o place_n and_o thing_n be_v as_o it_o be_v animarum_fw-la plena_fw-la and_o i_o have_v often_o with_o wonder_n and_o pleasure_n in_o the_o spring_n and_o summertime_n look_v close_o to_o and_o diligent_o on_o common_a garden_n mould_n and_o in_o a_o very_a small_a parcel_n of_o it_o find_v such_o multitude_n and_o diversity_n of_o little_a reptile_n some_o in_o husk_n other_o only_a creeper_n many_o wing_a and_o ready_a for_o the_o air_n divers_a husk_n or_o habitation_n leave_v behind_o empty_a now_o if_o the_o earth_n of_o our_o cold_a climate_n be_v so_o fertile_a of_o animate_v body_n what_o may_v we_o think_v of_o the_o fat_a earth_n of_o hot_a climate_n certain_o the_o sun_n may_v there_o by_o its_o
of_o venice_n looking-glass_n the_o description_n of_o they_o obser._n 29._o of_o the_o seed_n of_o time_n a_o description_n of_o they_o a_o digression_n about_o nature_n method_n obseru._n 30._o of_o poppy_n seed_n the_o description_n and_o use_n of_o they_o obseru._n 31._o of_o purslane_n seed_n a_o description_n of_o these_o and_o many_o other_o seed_n obseru._n 32._o of_o hair_n the_o description_n of_o several_a sort_n of_o hair_n their_o figure_n and_o texture_n the_o reason_n of_o their_o colour_n a_o description_n of_o the_o texture_n of_o the_o skin_n and_o of_o spunk_n and_o sponge_n by_o what_o passage_n and_o pore_n of_o the_o skin_n transpiration_n seem_v to_o be_v make_v experiment_n to_o prove_v the_o porousness_n of_o the_o skin_n of_o vegetable_n obseru._n 33._o of_o the_o scale_n of_o a_o sole_a a_o description_n of_o their_o beauteous_a form_n obseru._n 34._o of_o the_o sting_n of_o a_o bee_n a_o description_n of_o its_o shape_n mechanism_n and_o use_v obseru._n 35._o of_o feather_n a_o description_n of_o the_o shape_n and_o curious_a contexture_n of_o feather_n and_o some_o conjecture_n thereupon_o obser._n 36._o of_o peacock_n feather_n a_o description_n of_o their_o curious_a form_n and_o propriety_n with_o a_o conjecture_n at_o the_o cause_n of_o their_o variable_a colour_n obser._n 37._o of_o the_o foot_n of_o fly_n and_o other_o infect_v a_o description_n of_o their_o figure_n part_n and_o use_v and_o some_o consideration_n thereupon_o obser._n 38._o of_o the_o wing_n of_o fly_n after_o what_o manner_n and_o how_o swift_o the_o wing_n of_o infect_v move_v a_o description_n of_o the_o pendulum_n under_o the_o wing_n and_o their_o motion_n the_o shape_n and_o structure_n of_o the_o part_n of_o the_o wing_n obser._n 39_o of_o the_o head_n of_o a_o fly_n 1._o all_o the_o face_n of_o a_o drone-f_o be_v nothing_o almost_o but_o eye_n 2._o those_o be_v of_o two_o magnitude_n 3._o they_o be_v hemisphere_n and_o very_o reflective_a and_o smooth_a 4._o some_o direct_v towards_o every_o quarter_n 5._o how_o the_o fly_n cleanse_v they_o 6._o their_o number_n 7._o their_o order_n divers_a particular_n observe_v in_o the_o dissect_n a_o head_n that_o these_o be_v very_o probable_o the_o eye_n of_o the_o creature_n argue_v from_o several_a observation_n and_o experiment_n that_o crab_n lobster_n shrimp_v seem_v to_o be_v water_n infect_v and_o to_o be_v frame_v much_o like_a air_n infect_v several_a consideration_n about_o their_o manner_n of_o vision_n obser._n 40._o of_o the_o tooth_n of_o a_o snail_n a_o brief_a description_n of_o it_o obseru._n 41._o of_o the_o egg_n of_o silkworm_n several_a observable_n about_o the_o egg_n of_o infect_v obseru._n 42._o of_o a_o blue_a fly_n a_o description_n of_o its_o outward_a and_o inward_a part_n it_o be_v hardiness_n to_o endure_v freeze_v and_o steep_v in_o spirit_n of_o wine_n obseru._n 43._o of_o a_o water_n insect_n a_o description_n of_o its_o shape_n transparency_n motion_n both_o internal_a and_o progressive_a and_o transformation_n a_o history_n somewhat_o analogus_fw-la cite_v out_o of_o piso._n several_a observation_n about_o the_o various_a way_n of_o the_o generation_n of_o infect_v by_o what_o mean_v they_o act_v so_o seem_o wise_o and_o prudent_o several_a query_n propound_v postscript_n contain_v a_o relation_n of_o another_o very_a odd_a way_n of_o the_o generation_n of_o infect_v a_o observation_n about_o the_o fertility_n of_o the_o earth_n of_o our_o climate_n in_o produce_v infect_v and_o of_o divers_a other_o way_n of_o their_o generation_n obseru._n 44._o of_o the_o tuft_a gnat._n several_a observable_n about_o infect_v and_o a_o more_o particular_a description_n of_o the_o part_n of_o this_o gnat._n ob._n 45._o of_o the_o great_a belly_a gnat._n a_o short_a description_n of_o it_o obser._n 46._o of_o a_o white_a moth._n a_o description_n of_o the_o feather_n and_o wing_n of_o this_o and_o several_a other_o infect_v divers_a consideration_n about_o the_o wing_n and_o the_o fly_n of_o infect_v and_o bird_n obs._n 47._o of_o the_o shepherd_n spider_n a_o description_n of_o its_o eye_n and_o the_o socket_n of_o its_o long_a leg_n and_o a_o conjecture_n of_o the_o mechanical_a reason_n of_o its_o fabric_n together_o with_o a_o supposition_n that_o it_o be_v not_o unlikely_a but_o spider_n may_v have_v the_o make_v of_o their_o inward_a part_n exact_o like_o a_o crab_n which_o may_v be_v call_v a_o water_n spider_n obser._n 48._o of_o the_o hunt_a spider_n a_o short_a description_n of_o it_o to_o which_o be_v annex_v a_o excellent_a history_n of_o it_o make_v by_o mr._n evelyn_n some_o further_a observation_n on_o other_o spider_n and_o their_o web_n together_o with_o a_o examination_n of_o a_o white_a substance_n fly_v up_o and_o down_o in_o the_o air_n after_o a_o fog_n obser._n 49._o of_o a_o ant._n that_o all_o small_a body_n both_o vegetable_a and_o animal_n do_v quick_o dry_a and_o wither_v the_o best_a remedy_n i_o find_v to_o hinder_v it_o and_o to_o make_v the_o animal_n lie_v still_o to_o be_v observe_v several_a particular_n relate_v of_o the_o action_n of_o this_o creature_n and_o a_o short_a description_n of_o its_o part_n obs._n 50._o of_o the_o wander_a mite_n a_o description_n of_o this_o creature_n and_o of_o another_o very_a small_a one_o which_o usual_o bear_v it_o company_n a_o conjecture_n at_o the_o original_n of_o mite_n obseru._n 51._o of_o a_o crablike_a insect_n a_o brief_a description_n of_o it_o obseru._n 52._o of_o a_o book-worm_n a_o description_n of_o it_o where_o by_o the_o way_n be_v insert_v a_o digression_n experimental_o explicate_v the_o phaenomena_n of_o pearl_n a_o consideration_n of_o its_o digestive_a faculty_n obseru._n 53._o of_o a_o flea_n a_o short_a description_n of_o it_o obseru._n 54._o of_o a_o louse_n a_o description_n of_o its_o part_n and_o some_o notable_a circumstance_n obseru._n 55._o of_o mite_n the_o exceed_a smallness_n of_o some_o mite_n and_o their_o eggs._n a_o description_n of_o the_o mite_n of_o cheese_n and_o a_o intimation_n of_o the_o variety_n of_o form_n in_o other_o mite_n with_o a_o conjecture_n at_o the_o reason_n ob._n 56._o of_o small_a vine-mite_n a_o description_n of_o they_o a_o guess_n at_o their_o original_n their_o exceed_a smallness_n compare_v with_o that_o of_o a_o woodlouse_n from_o which_o they_o may_v be_v suppose_v to_o come_v obseru._n 57_o of_o vinegar-worm_n a_o description_n of_o they_o with_o some_o consideration_n on_o their_o motion_n obs._n 58._o of_o the_o inflection_n of_o the_o ray_n of_o light_n in_o the_o air._n a_o short_a rehearsal_n of_o several_a phaenomena_n a_o attempt_n to_o explicate_v they_o the_o supposition_n found_v on_o two_o proposition_n both_o which_o be_v endeavour_v to_o be_v make_v out_o by_o several_a experiment_n what_o density_n and_o rarity_n be_v in_o respect_n of_o refraction_n the_o refraction_n of_o spirit_n of_o wine_n compare_v with_o that_o of_o common_a water_n the_o refraction_n of_o ice_n a_o experiment_n of_o make_v a_o vndulation_n of_o the_o ray_n by_o the_o mix_n of_o liquor_n of_o differ_a density_n the_o explication_n of_o inflection_n mechanical_o and_o hypothetical_o what_o body_n have_v such_o a_o inflection_n several_a experiment_n to_o show_v that_o the_o air_n have_v this_o propriety_n that_o it_o proceed_v from_o the_o differ_a density_n of_o the_o air_n that_o the_o upper_a and_o under_o part_n of_o the_o air_n be_v of_o differ_v density_n some_o experiment_n to_o prove_v this_o a_o table_n of_o the_o strength_n of_o the_o spring_n of_o the_o air_n answer_v to_o each_o degree_n of_o extension_n when_o first_o make_v and_o when_o repeat_v another_o experiment_n of_o compress_v the_o air._n a_o table_n of_o the_o strength_n of_o the_o air_n answer_v to_o each_o compression_n and_o expansion_n from_o which_o the_o height_n of_o the_o air_n may_v be_v suppose_v indefinite_a to_o what_o degree_n the_o air_n be_v rarify_v at_o any_o distance_n above_o the_o surface_n of_o the_o earth_n how_o from_o this_o inflection_n be_v infer_v and_o several_a phaenomena_n explain_v that_o the_o air_n near_o the_o earth_n be_v compose_v of_o part_n of_o differ_a density_n make_v probable_a by_o several_a experiment_n and_o observation_n how_o this_o propriety_n produce_v the_o effect_n of_o the_o wave_a and_o dance_v of_o body_n and_o of_o the_o twinkle_n of_o the_o star_n several_a phaenomena_n explicate_v some_o quoeries_n add_v 1._o whether_o this_o principle_n may_v not_o be_v make_v use_n of_o for_o perfect_v optic_a glass_n what_o may_v be_v hope_v from_o it_o if_o it_o be_v to_o be_v do_v 2._o whether_o from_o this_o principle_n the_o apparition_n of_o some_o new_a star_n may_v not_o be_v explicate_v 3._o whether_o the_o height_n of_o the_o air_n may_v be_v define_v by_o it_o 4._o whether_o there_o may_v not_o sometime_o be_v so_o great_a a_o disparity_n of_o density_n between_o