the_o midst_n of_o the_o heaven_n 15_o the_o cause_n of_o whiteness_n 16_o the_o cause_n of_o blackness_n 1_o beside_o the_o star_n of_o which_o i_o have_v speak_v in_o the_o last_o chapt._n whatsoever_o other_o body_n there_o be_v in_o the_o world_n they_o may_v be_v all_o comprehend_v under_o the_o name_n of_o intersidereal_a body_n and_o these_o i_o have_v already_o suppose_v to_o be_v either_o the_o most_o fluid_a aether_n or_o such_o body_n who_o part_n have_v some_o degree_n of_o cohaesion_n now_o these_o differ_v from_o one_o another_o in_o their_o several_a consistency_n magnitude_n motion_n and_o figure_n in_o consistency_n i_o suppose_v some_o body_n to_o be_v hard_o other_o soft_a through_o all_o the_o several_a degree_n of_o tenacity_n in_o magnitude_n some_o to_o be_v great_a other_o less_o and_o many_o unspeakable_o little_a for_o we_o must_v remember_v that_o by_o the_o understanding_n quantity_n be_v divisible_a into_o divisibles_fw-fr perpetual_o and_o therefore_o if_o 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of_o the_o niter_n be_v generate_v that_o vehement_a motion_n and_o inflammation_n and_o last_o when_o there_o be_v no_o more_o action_n from_o the_o niter_fw-la that_o be_v to_o say_v when_o the_o volatile_a part_n of_o the_o niter_n be_v fly_v out_o there_o be_v find_v about_o the_o side_n a_o certain_a white_a substance_n which_o be_v throw_v again_o into_o the_o fire_n will_v grow_v red_a hot_a again_o but_o will_v not_o be_v dissipate_v at_o least_o unless_o the_o fire_n be_v augment_v if_o now_o a_o possible_a cause_n of_o this_o be_v find_v out_o the_o same_o will_v also_o be_v a_o possible_a cause_n why_o a_o grain_n of_o gunpowder_n set_v on_o fire_n do_v expand_v itself_o with_o such_o vehement_a motion_n and_o shine_v and_o it_o may_v be_v cause_v in_o this_o manner_n let_v the_o particle_n of_o which_o niter_n consist_v be_v suppose_v to_o be_v some_o of_o they_o hard_o other_o watery_a and_o the_o rest_n aethereal_a also_o let_v the_o hard_a particle_n be_v suppose_v to_o 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the_o other_o and_o by_o this_o reciprocation_n whatsoever_o be_v fluid_a in_o both_o the_o piece_n of_o wood_n be_v force_v hither_o and_o thither_o and_o consequent_o to_o a_o endeavour_n of_o get_v out_o and_o at_o last_o by_o break_v out_o make_v fire_n 12_o now_o light_n be_v distinguish_v into_o first_o second_o third_z and_o so_o on_o infinite_o and_o we_o call_v that_o first_o light_n which_o be_v in_o the_o first_o lucid_a body_n as_o the_o sun_n fire_n etc._n etc._n second_o that_o which_o be_v in_o such_o body_n as_o be_v not_o transparent_a be_v illuminate_v by_o the_o sun_n as_o the_o moon_n a_o wall_n etc._n etc._n and_o three_o that_o which_o be_v in_o body_n not_o transparent_a but_o illuminate_v by_o second_o light_n etc._n etc._n 13_o colour_n be_v light_a but_o trouble_a light_n namely_o such_o as_o be_v generate_v by_o perturb_a motion_n as_o shall_v be_v make_v manifest_a by_o the_o red_a yellow_a blue_a and_o purple_a which_o be_v generate_v by_o the_o interposition_n of_o a_o diaphanous_a prisma_fw-la who_o opposite_a base_n be_v triangular_a between_o the_o light_n and_o that_o which_o be_v enlighten_v for_o let_v there_o be_v a_o prisma_fw-la of_o glass_n or_o of_o any_o other_o transparent_a matter_n which_o be_v of_o great_a density_n than_o air_n and_o let_v the_o triangle_n abc_n be_v the_o base_a of_o this_o prisma_fw-la also_o let_v the_o straight_a line_n de_fw-fr be_v the_o diameter_n of_o the_o sun_n body_n have_v oblique_a position_n to_o the_o straight_a line_n ab_fw-la and_o let_v the_o sunbeam_n pass_v in_o the_o line_n da_fw-la and_o ebc_n and_o last_o let_v the_o straight_a line_n da_fw-la and_o aec_fw-la be_v produce_v indefinite_o to_o f_o and_o g._n see_v therefore_o the_o straight_a line_n da_fw-la by_o reason_n of_o the_o density_n of_o the_o glass_n be_v refract_v towards_o the_o perpendicular_a let_v the_o line_n refract_v at_o the_o point_n a_o be_v the_o straight_a line_n ah_o and_o again_o see_v the_o medium_fw-la below_o ac_fw-la be_v thin_a than_o that_o above_o it_o the_o other_o refraction_n which_o will_v be_v make_v there_o will_v diverge_n from_o the_o perpendicular_a let_v therefore_o this_o second_o refracted_a line_n be_v ai._n also_o let_v the_o same_o be_v do_v at_o the_o point_n c_o by_o make_v the_o first_o refract_v line_n to_o be_v ck_n and_o the_o second_o cl._n see_v therefore_o the_o cause_n of_o the_o refraction_n in_o the_o point_n a_o of_o the_o straight_a line_n of_o ab_fw-la be_v the_o excess_n of_o the_o resistance_n of_o the_o medium_fw-la in_o ab_fw-la above_o the_o resistance_n of_o the_o air_n there_o must_v of_o necessity_n be_v reaction_n from_o the_o point_n a_o towards_o the_o point_n b_o and_o consequent_o the_o medium_fw-la at_o a_o within_o the_o triangle_n abc_n will_v have_v its_o motion_n trouble_v that_o be_v to_o say_v the_o straight_a motion_n in_o of_o and_o ah_o will_v be_v mix_v with_o the_o transverse_a motion_n between_o the_o same_o of_o and_o ah_o represent_v by_o the_o short_a transverse_a line_n in_o the_o triangle_n afh_v again_o see_v at_o the_o point_n a_o of_o the_o straight_a line_n ac_fw-la there_o be_v a_o second_o refraction_n from_o ah_o in_o ai_fw-fr the_o motion_n of_o the_o medium_fw-la will_v again_o be_v perturb_v by_o reason_n of_o the_o transverse_a reaction_n from_o a_o towards_o c_o represent_v likewise_o by_o the_o short_a transverse_a line_n in_o the_o triangle_n ahi_n and_o in_o the_o same_o manner_n there_o be_v a_o double_a perturbation_n represent_v by_o the_o transverse_a line_n in_o the_o triangle_n cgk_n and_o ckl_n but_o as_o for_o the_o light_n between_o a_z and_o cg_n it_o will_v not_o be_v perturb_v because_o if_o there_o be_v in_o all_o the_o point_n of_o the_o straight_a line_n ab_fw-la and_o ac_fw-la the_o same_o action_n which_o be_v in_o the_o point_v a_o and_o c_o then_z the_o plain_a of_o the_o triangle_n cgk_n will_v be_v every_o where_o coincident_a with_o the_o plain_a of_o the_o triangle_n afh_v by_o which_o mean_v all_o will_v appear_v alike_o between_o a_o and_o c._n beside_o it_o be_v to_o be_v observe_v that_o all_o the_o reaction_n at_o a_o tend_v towards_o the_o illuminate_v part_n which_o be_v between_o a_o and_o c_o and_o consequent_o perturb_v the_o first_o light_n and_o on_o the_o contrary_a that_o all_o the_o reaction_n at_o c_o tend_v towards_o the_o part_n without_o the_o triangle_n or_o without_o the_o prisma_fw-la abc_n where_o there_o be_v none_o but_o second_o light_n and_o that_o the_o triangle_n afh_n show_v that_o perturbation_n of_o light_n which_o be_v make_v in_o the_o glass_n itself_o as_o the_o triangle_n ahi_n show_v that_o perturbation_n of_o light_n which_o be_v make_v below_o the_o glass_n in_o like_a manner_n that_o cgk_n show_v the_o perturbation_n of_o light_n within_o the_o glass_n and_o ckl_n that_o which_o be_v below_o the_o glass_n from_o whence_o there_o be_v four_o divers_a motion_n or_o four_o different_a illumination_n or_o colour_n who_o difference_n appear_v most_o manifest_o to_o the_o sense_n in_o a_o prisma_fw-la who_o base_a be_v a_o equilateral_a triangle_n when_o the_o sunbeam_n that_o pass_v through_o it_o be_v receive_v upon_o a_o white_a paper_n for_o the_o triangle_n afh_n appear_v red_a to_o the_o sense_n the_o triangle_n ahi_n yellow_a the_o triangle_n cgk_n green_n and_o approach_v to_o blue_n and_o last_o the_o triangle_n ckl_n appear_v purple_a it_o be_v therefore_o evident_a that_o when_o weak_a but_o first_o light_n pass_v through_o a_o more_o resist_a diaphanous_a body_n as_o glass_n the_o beam_n which_o fall_v upon_o it_o tranvers_o make_v redness_n and_o when_o the_o same_o first_o light_n be_v strong_a as_o it_o be_v in_o the_o thin_a medium_fw-la below_o the_o straight_a line_n ac_fw-la the_o transverse_a beam_n make_v yellowness_n also_o when_o second_o light_n be_v strong_a
as_o it_o be_v in_o the_o triangle_n cgk_n which_o be_v near_a to_o the_o first_o light_n the_o transverse_a beam_n make_v greenesse_n and_o when_o the_o same_o second_o light_n be_v weak_a as_o in_o the_o triangle_n ckl_n they_o make_v a_o purple_a colour_n 14_o from_o hence_o may_v be_v deduce_v a_o cause_n why_o the_o moon_n and_o star_n appear_v big_a and_o red_a near_o the_o horizon_n then_o in_o the_o mid-heaven_n for_o between_o the_o eye_n and_o the_o apparent_a horizon_n there_o be_v more_o impure_a air_n such_o as_o be_v mingle_v with_o watery_a and_o earthy_a little_a body_n then_o be_v between_o the_o same_o eye_n and_o the_o more_o elevate_a part_n of_o heaven_n but_o vision_n be_v make_v by_o beam_n which_o constitute_v a_o cone_n who_o base_a if_o we_o look_v upon_o the_o moon_n be_v the_o moon_n face_n and_o who_o vertex_fw-la be_v in_o the_o eye_n and_o therefore_o many_o beam_n from_o the_o moon_n must_v needs_o fall_v upon_o little_a body_n that_o be_v without_o 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be_v do_v 16_o grant_v that_o the_o cloud_n may_v be_v freeze_v it_o be_v no_o wonder_n if_o the_o moon_n have_v be_v see_v eclipse_v at_o such_o time_n as_o she_o have_v be_v almost_o two_o degree_n above_o the_o horizon_n the_o sun_n at_o the_o same_o time_n appear_v in_o the_o horizon_n for_o such_o a_o eclipse_n be_v observe_v by_o mestline_n at_o tube_v in_o the_o year_n 1590._o for_o it_o may_v happen_v that_o a_o freeze_a cloud_n be_v then_o interpose_v between_o the_o sun_n and_o the_o eye_n of_o the_o observer_n and_o if_o it_o be_v so_o the_o sun_n which_o be_v then_o almost_o two_o degree_n below_o the_o horizon_n may_v appear_v to_o be_v in_o it_o by_o reason_n of_o the_o pass_n of_o his_o beam_n through_o the_o ice_n and_o it_o be_v to_o be_v note_v that_o those_o that_o attribute_v such_o refraction_n to_o the_o atmosphere_n can_v attribute_v to_o it_o so_o great_a a_o refraction_n as_o this_o wherefore_o not_o the_o atmosphere_n but_o either_o water_n in_o a_o continue_a 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a_o syringe_n into_o the_o space_n fgb_n in_o that_o injection_n the_o air_n but_o pure_a air_n go_v with_o the_o same_o force_n out_o of_o the_o vessel_n through_o the_o injected_a water_n but_o as_o for_o those_o small_a body_n which_o former_o i_o suppose_v to_o be_v intermingle_v with_o air_n &_o to_o be_v move_v with_o simple_a motion_n they_o can_v not_o together_o with_o the_o our_o air_n penetrate_v the_o water_n but_o remain_v behind_o be_v necessary_o thrust_v together_o into_o a_o narrow_a place_n namely_o into_o the_o space_n which_o be_v above_o the_o water_n fg._n the_o motion_n therefore_o of_o those_o small_a body_n will_v be_v less_o and_o less_o free_a by_o how_o much_o the_o quantity_n of_o the_o injected_a water_n be_v great_a and_o great_a so_o that_o by_o their_o motion_n fall_v upon_o one_o another_o the_o same_o small_a body_n will_v mutual_o compress_v each_o other_o and_o have_v a_o perpetual_a endeavour_n of_o regayn_v their_o liberty_n and_o of_o depress_v the_o water_n that_o hinder_v they_o wherefore_o as_o soon_o as_o the_o orifice_n above_o be_v open_v the_o water_n which_o be_v next_o it_o will_v have_v a_o endeavour_n to_o ascend_v and_o will_v therefore_o necessary_o go_v out_o but_o it_o can_v go_v out_o unless_o at_o the_o same_o time_n there_o enter_v in_o as_o much_o air_n and_o therefore_o both_o the_o water_n will_v go_v out_o and_o the_o air_n enter_v in_o till_o those_o small_a body_n which_o be_v leave_v within_o the_o vessel_n have_v recover_v their_o former_a liberty_n of_o motion_n that_o be_v to_o say_v till_o the_o vessel_n be_v again_o fill_v with_o air_n and_o no_o water_n be_v leave_v of_o sufficient_a height_n to_o stop_v the_o passage_n at_o b._n wherefore_o i_o have_v show_v a_o possible_a cause_n of_o this_o phaenomenon_n namely_o the_o same_o with_o that_o of_o thunder_n for_o as_o in_o the_o generation_n of_o thunder_n the_o small_a body_n enclose_v within_o the_o cloud_n by_o be_v too_o close_o pen_v 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number_n of_o small_a hard_a body_n which_o be_v heavy_a than_o the_o pure_a air_n for_o the_o aethereal_a substance_n be_v on_o all_o side_n equal_o agitate_a by_o the_o motion_n of_o the_o sun_n have_v a_o equal_a endeavour_n towards_o all_o the_o part_n of_o the_o universe_n and_o therefore_o it_o have_v no_o gravity_n at_o all_o 11_o we_o find_v also_o by_o experience_n that_o by_o the_o force_n of_o air_n enclose_v in_o a_o hollow_a canon_n a_o bullet_n of_o lead_n may_v with_o considerable_a violence_n be_v shoot_v out_o of_o a_o gun_n of_o late_a invention_n call_v the_o windgun_n in_o the_o end_n of_o this_o canon_n there_o be_v two_o hole_n with_o their_o valve_n on_o the_o inside_n to_o shut_v they_o close_o one_o of_o they_o serve_v for_o the_o admission_n of_o air_n and_o the_o other_o for_o the_o let_n of_o it_o out_o also_o to_o that_o end_n which_o serve_v for_o the_o receive_n in_o of_o air_n there_o be_v join_v another_o canon_n of_o the_o same_o metal_n and_o bigness_n in_o which_o there_o be_v fit_v a_o rammer_n which_o be_v perforate_v and_o have_v also_o a_o valve_n open_v towards_o the_o former_a canon_n by_o the_o help_n of_o this_o valve_n the_o rammer_n be_v easy_o draw_v back_o and_o let_v in_o air_n from_o without_o and_o be_v often_o draw_v back_o and_o return_v again_o with_o violent_a stroke_n it_o force_v some_o part_n of_o that_o air_n into_o the_o former_a canon_n so_o long_o till_o at_o last_o the_o resistance_n of_o the_o enclose_a air_n be_v great_a than_o the_o force_n of_o the_o stroke_n and_o by_o this_o mean_n man_n think_v there_o be_v now_o a_o great_a quantity_n of_o air_n in_o the_o canon_n then_o there_o be_v former_o though_o it_o be_v full_a before_o also_o the_o air_n thus_o force_v in_o how_o much_o soever_o it_o be_v be_v hinder_v from_o get_v out_o again_o by_o the_o foresay_a valve_n which_o the_o very_a endeavour_n of_o the_o air_n to_o get_v out_o do_v necessary_o shut_v last_o that_o valve_n be_v open_v which_o be_v make_v for_o the_o let_v out_o of_o the_o air_n it_o present_o break_v out_o with_o violence_n &_o drive_v the_o bullet_n before_o it_o with_o great_a force_n and_o velocity_n as_o for_o the_o cause_n of_o this_o i_o can_v easy_o attribute_v it_o as_o most_o man_n do_v to_o condensation_n and_o think_v that_o the_o air_n which_o have_v at_o the_o first_o but_o its_o ordinary_a degree_n of_o rarity_n be_v afterward_o by_o the_o force_n in_o of_o more_o air_n condense_v and_o last_o of_o all_o rarefy_v again_o by_o be_v let_v out_o and_o restore_v to_o its_o natural_a liberty_n but_o i_o can_v imagine_v how_o the_o same_o place_n can_v be_v always_o full_a and_o nevertheless_o contain_v sometime_o a_o great_a sometime_o a_o less_o quantity_n of_o matter_n that_o be_v to_o say_v that_o it_o can_v be_v full_a than_o full_a nor_o can_v i_o conceive_v how_o fullness_n can_v of_o itself_o be_v a_o efficient_a cause_n of_o motion_n for_o both_o â—hese_n be_v impossible_a wherefore_o we_o must_v seek_v out_o some_o other_o possible_a cause_n of_o this_o phaenomenon_n whilst_o therefore_o the_o valve_n with_o ch_n serve_v for_o the_o let_n in_o of_o air_n be_v open_v by_o the_o first_o stroke_n of_o the_o rammer_n the_o air_n within_o do_v with_o equal_a force_n resist_v the_o enter_n of_o the_o air_n from_o without_o so_o that_o the_o endeavour_n between_o the_o internal_a and_o external_a air_n be_v opposite_a that_o be_v there_o be_v two_o opposite_a motion_n while_o the_o one_o go_v in_o and_o the_o other_o come_v out_o but_o no_o augmentation_n at_o all_o of_o air_n within_o the_o canon_n for_o there_o be_v drive_v out_o by_o the_o stroke_n as_o much_o pure_a air_n which_o pass_v between_o the_o rammer_n and_o the_o side_n of_o the_o canon_n as_o there_o be_v force_v in_o of_o air_n impure_a by_o the_o same_o stroke_n and_o thus_o by_o many_o forcible_a stroke_n the_o quantity_n of_o small_a hard_a body_n will_v be_v increase_v within_o the_o canon_n and_o their_o motion_n also_o will_v grow_v strong_a and_o strong_a as_o long_a as_o the_o matter_n of_o the_o canon_n be_v able_a to_o endure_v their_o force_n by_o which_o if_o it_o be_v not_o break_v it_o will_v at_o least_o be_v urge_v every_o way_n by_o their_o endeavour_n to_o free_v themselves_o and_o as_o soon_o as_o the_o valve_n which_o serve_v to_o let_v they_o out_o be_v open_v they_o will_v fly_v out_o with_o violent_a motion_n and_o carry_v with_o they_o the_o bullet_n which_o be_v in_o their_o way_n wherefore_o i_o have_v give_v a_o possible_a cause_n of_o this_o phaenomenon_n 12_o water_n contrary_a to_o the_o custom_n of_o heavy_a body_n ascend_v in_o the_o weatherglass_n but_o it_o do_v it_o when_o the_o air_n be_v cold_a for_o when_o it_o be_v warm_v it_o descend_v again_o and_o this_o organ_n be_v call_v a_o thermometer_n or_o thermoscope_n because_o the_o degree_n of_o heat_n and_o cold_a be_v measure_v and_o mark_v by_o it_o it_o be_v make_v in_o this_o manner_n let_v a_o b_o c_o d_o in_o the_o 5_o figure_n be_v a_o vessel_n full_a of_o water_n and_o e_o f_o g_o a_o hollow_a cylinder_n of_o glass_n close_v at_o e_o and_o open_a at_o g._n let_v it_o be_v heat_v and_o set_v upright_o within_o the_o water_n to_o f_o and_o let_v the_o open_a end_n reach_v to_o g._n this_o be_v do_v as_o the_o air_n by_o little_a and_o little_o grow_v cold_a the_o water_n will_v ascend_v slow_o within_o the_o cylinder_n from_o f_o towards_o e_z till_o at_o last_o the_o external_a and_o internal_a air_n come_v to_o be_v both_o of_o the_o same_o temper_n it_o will_v neither_o ascend_v high_a nor_o descend_v low_o till_o the_o temper_n of_o the_o air_n be_v change_v suppose_v it_o therefore_o
indefinite_o that_o be_v to_o know_v as_o much_o as_o they_o can_v without_o propound_v to_o themselves_o any_o limit_a question_n or_o they_o inquire_v into_o the_o cause_n of_o some_o determine_a appearance_n or_o endeavour_v to_o find_v out_o the_o certainty_n of_o something_o in_o question_n as_o what_o be_v the_o cause_n of_o light_n of_o heat_n of_o gravity_n of_o a_o figure_n propound_v and_o the_o like_a or_o in_o what_o subject_n any_o propound_a accident_n be_v inhaerent_a or_o what_o may_v conduce_v most_o to_o the_o generation_n of_o some_o propound_a effect_n from_o many_o accident_n or_o in_o what_o manner_n particular_a cause_n ought_v to_o be_v compound_v for_o the_o production_n of_o some_o certain_a effect_n now_o according_a to_o this_o variety_n of_o thing_n in_o question_n sometime_o the_o analyticall_a method_n be_v to_o be_v use_v and_o sometime_o the_o syntheticall_a 4_o but_o to_o those_o that_o search_v after_o science_n indefinite_o which_o consist_v in_o the_o knowledge_n of_o the_o cause_n of_o all_o thing_n as_o far_o forth_o as_o it_o may_v be_v attain_v and_o the_o cause_n of_o singular_a thing_n be_v compound_v of_o the_o cause_n of_o universal_a or_o simple_a thing_n it_o be_v necessary_a that_o they_o know_v the_o cause_n of_o universal_a thing_n or_o of_o such_o accident_n as_o be_v common_a to_o all_o body_n that_o be_v to_o all_o matter_n before_o they_o can_v know_v the_o cause_n of_o singular_a thing_n that_o be_v of_o those_o accident_n by_o which_o one_o thing_n be_v distinguish_v from_o another_o and_o again_o they_o must_v know_v what_o those_o universal_a thing_n be_v before_o they_o can_v know_v their_o cause_n moreover_o see_v universal_a thing_n be_v contain_v in_o the_o nature_n of_o singular_a thing_n the_o knowledge_n of_o they_o be_v to_o be_v acquire_v by_o reason_n that_o be_v by_o resolution_n for_o example_n if_o there_o be_v propound_v a_o conception_n or_o idea_n of_o some_o singular_a thing_n as_o of_o a_o square_a this_o square_n be_v to_o be_v resolve_v into_o a_o plain_a terminate_v with_o a_o certain_a number_n of_o equal_a and_o straight_a line_n and_o right_a angle_n for_o by_o this_o resolution_n we_o have_v these_o thing_n universal_a or_o agreeable_a to_o all_o matter_n namely_o line_n plain_n which_o contain_v superficies_n terminate_v angle_n straightness_n rectitude_n and_o equality_n and_o if_o we_o can_v find_v out_o the_o cause_n of_o these_o we_o may_v compound_v they_o all_o together_o into_o the_o cause_n of_o a_o square_n again_o if_o any_o man_n propound_v to_o himself_o the_o conception_n of_o gold_n he_o may_v by_o resolve_v come_v to_o the_o idea_n of_o solid_a visible_a heavy_a that_o be_v tend_v to_o the_o centre_n of_o the_o earth_n or_o downward_o and_o many_o other_o more_o universal_a than_o gold_n itself_o and_o these_o he_o may_v resolve_v again_o till_o he_o come_v to_o such_o thing_n as_o be_v most_o universal_a and_o in_o this_o manner_n by_o resolve_v continual_o we_o may_v come_v to_o know_v what_o those_o thing_n be_v who_o cause_n be_v first_o know_v several_o and_o afterward_o compound_v bring_v we_o to_o the_o knowledge_n of_o singular_a thing_n i_o conclude_v therefore_o that_o the_o method_n of_o attain_v to_o the_o universal_a knowledge_n of_o thing_n be_v pure_o analyticall_a 5_o but_o the_o cause_n of_o universal_a thing_n of_o those_o at_o least_o that_o have_v any_o cause_n be_v manifest_a of_o themselves_o or_o as_o they_o say_v common_o know_v to_o nature_n so_o that_o they_o need_v no_o method_n at_o all_o for_o they_o have_v all_o but_o one_o universal_a cause_n which_o be_v motion_n for_o the_o variety_n of_o all_o figure_n arise_v out_o of_o the_o variety_n of_o those_o motion_n by_o which_o they_o be_v make_v and_o motion_n can_v be_v understand_v to_o have_v any_o other_o cause_n beside_o motion_n nor_o have_v the_o variety_n of_o those_o thing_n we_o perceive_v by_o sense_n as_o of_o colour_n sound_n savour_n etc._n etc._n any_o other_o cause_n then_o motion_n reside_v partly_o in_o the_o object_n that_o work_v upon_o our_o sense_n and_o partly_o in_o ourselves_o in_o such_o manner_n as_o that_o it_o be_v manifest_o some_o kind_n of_o motion_n though_o we_o can_v without_o ratiocination_n come_v to_o know_v what_o kind_n for_o though_o many_o can_v understand_v till_o it_o be_v in_o some_o sort_n demonstrate_v to_o they_o that_o all_o mutation_n consist_v in_o motion_n yet_o this_o happen_v not_o from_o any_o obscurity_n in_o the_o thing_n itself_o for_o it_o be_v not_o intelligible_a that_o any_o thing_n can_v depart_v either_o from_o rest_n or_o from_o the_o motion_n it_o have_v except_o by_o motion_n but_o either_o by_o have_v their_o natural_a discourse_n corrupt_v with_o former_a opinion_n receive_v from_o their_o master_n or_o else_o for_o this_o that_o they_o do_v not_o at_o all_o bend_v their_o mind_n to_o the_o inquire_v out_o of_o truth_n 6_o by_o the_o knowledge_n therefore_o of_o universall_n and_o of_o their_o cause_n which_o be_v the_o first_o principle_n by_o which_o we_o know_v the_o 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d of_o thing_n we_o have_v in_o the_o first_o place_n their_o definition_n which_o be_v nothing_o but_o the_o explication_n of_o our_o simple_a conception_n for_o example_n he_o that_o have_v a_o true_a conception_n of_o place_n can_v be_v ignorant_a of_o this_o definition_n place_n be_v that_o space_n which_o be_v possess_v or_o fill_v adaequate_o by_o some_o body_n and_o so_o he_o that_o conceive_v motion_n aright_o can_v but_o know_v that_o motion_n be_v the_o privation_n of_o one_o place_n and_o the_o acquisition_n of_o another_o in_o the_o next_o place_n we_o have_v their_o generation_n or_o description_n as_o for_o example_n that_o a_o line_n be_v make_v by_o the_o motion_n of_o a_o point_n superficies_n by_o the_o motion_n of_o a_o line_n and_o one_o motion_n by_o another_o motion_n etc._n etc._n it_o remain_v that_o we_o inquire_v what_o motion_n beget_v such_o and_o such_o effect_n as_o what_o motion_n make_v a_o straight_a line_n and_o what_o a_o circular_a what_o motion_n thrust_v what_o draw_v and_o by_o what_o way_n what_o make_v a_o thing_n which_o be_v see_v or_o hear_v to_o be_v see_v or_o hear_v sometime_o in_o one_o manner_n sometime_o in_o another_o now_o the_o method_n of_o this_o kind_n of_o enquiry_n be_v compositive_a for_o first_o we_o be_v to_o observe_v what_o effect_v a_o body_n move_v produce_v when_o we_o consider_v nothing_o in_o it_o beside_o its_o motion_n and_o we_o see_v present_o that_o this_o make_v a_o line_n or_o length_n next_o what_o the_o motion_n of_o a_o long_a body_n produce_v which_o we_o find_v to_o be_v superficies_n and_o so_o forward_o till_o we_o see_v what_o the_o effect_n of_o simple_a motion_n be_v and_o then_o in_o like_a manner_n we_o be_v to_o observe_v what_o proceed_v from_o the_o addition_n multiplication_n substraction_n and_o division_n of_o these_o motion_n and_o what_o effect_n what_o figure_n and_o what_o property_n they_o produce_v from_o which_o kind_n of_o contemplation_n spring_v that_o part_n of_o philosophy_n which_o be_v call_v geometry_n from_o this_o consideration_n of_o what_o be_v produce_v by_o simple_a motion_n we_o be_v to_o pass_v to_o the_o consideration_n of_o what_o effect_n one_o body_n move_v work_v upon_o another_o and_o because_o there_o may_v be_v motion_n in_o all_o the_o several_a part_n of_o a_o body_n yet_o so_o as_o that_o the_o whole_a body_n remain_v still_o in_o the_o same_o place_n we_o must_v inquire_v first_o what_o motion_n cause_v such_o and_o such_o motion_n in_o the_o whole_a that_o be_v when_o one_o body_n invade_v another_o body_n which_o be_v either_o at_o rest_n or_o in_o motion_n what_o way_n and_o with_o what_o swiftness_n the_o invade_v body_n shall_v move_v and_o again_o what_o motion_n this_o second_o body_n will_v generate_v in_o a_o three_o and_o so_o forward_o from_o which_o contemplation_n shall_v be_v draw_v that_o part_n of_o philosophy_n which_o treat_v of_o motion_n in_o the_o three_o place_n we_o must_v proceed_v to_o the_o enquiry_n of_o such_o effect_n as_o be_v make_v by_o the_o motion_n of_o the_o part_n of_o any_o body_n as_o how_o it_o come_v to_o pass_v that_o thing_n when_o they_o be_v the_o same_o yet_o seem_v not_o to_o be_v the_o same_o but_o change_v and_o here_o the_o thing_n we_o search_v after_o be_v sensible_a quality_n such_o as_o light_v colour_n transparency_n opacity_n sound_v odour_n savour_n heat_n cold_a and_o the_o like_a which_o because_o they_o can_v be_v know_v till_o we_o know_v the_o cause_n of_o sense_n itself_o therefore_o the_o consideration_n of_o the_o cause_n of_o see_v hear_v smell_a taste_v and_o touch_v belong_v to_o this_o three_o place_n and_o all_o those_o quality_n and_o change_n above_o mention_v be_v to_o be_v refer_v to_o
at_o several_a time_n be_v by_o vehemence_n make_v strong_a and_o more_o predominant_a than_o the_o rest_n which_o deprive_v we_o of_o the_o sense_n of_o other_o phantasm_n no_o otherwise_o then_o the_o sun_n deprive_v the_o rest_n of_o the_o star_n of_o light_n not_o by_o hinder_v their_o action_n but_o by_o obscure_v and_o hide_v they_o with_o his_o excess_n of_o brightness_n 7._o but_o the_o motion_n of_o the_o organ_n by_o which_o a_o phantasm_n be_v make_v be_v not_o common_o call_v sense_n except_o the_o object_n be_v present_a and_o the_o phantasm_n remain_v after_o the_o object_n be_v remove_v or_o pass_v by_o be_v call_v fancy_n and_o in_o latin_a imaginatio_fw-la which_o word_n because_o all_o phantasm_n be_v not_o image_n do_v not_o full_o answer_v the_o signification_n of_o the_o word_n fancy_n in_o its_o general_a acceptation_n nevertheless_o i_o may_v use_v it_o safe_o enough_o by_o understand_v it_o for_o the_o greek_a 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d imagination_n therefore_o be_v nothing_o else_o but_o sense_n decay_v or_o weaken_v by_o the_o absence_n of_o the_o object_n but_o what_o may_v be_v the_o cause_n of_o this_o decay_n or_o weaken_n be_v the_o motion_n the_o weak_a because_o the_o object_n be_v take_v away_o if_o it_o be_v than_o phantasm_n will_v always_o and_o necessary_o be_v less_o clear_a in_o the_o imagination_n than_o they_o be_v in_o sense_n which_o be_v not_o true_a for_o in_o dream_n which_o be_v the_o imagination_n of_o those_o that_o sleep_n they_o be_v no_o less_o clear_a than_o in_o sense_n itself_o but_o the_o reason_n why_o in_o man_n wake_v the_o phantasm_n of_o thing_n past_a be_v more_o obscure_a than_o those_o of_o thing_n present_a be_v this_o that_o their_o organ_n be_v at_o the_o same_o time_n move_v by_o other_o present_a object_n those_o phantasm_n be_v the_o less_o predominant_a whereas_o in_o sleep_n the_o passage_n be_v shut_v up_o external_a action_n do_v not_o at_o all_o disturb_v or_o hinder_v internal_a motion_n if_o this_o be_v true_a the_o next_o thing_n to_o be_v consider_v will_v be_v whether_o any_o cause_n may_v be_v find_v out_o from_o the_o supposition_n whereof_o it_o will_v follow_v that_o the_o passage_n be_v shut_v up_o from_o the_o external_a object_n of_o sense_n to_o the_o internal_a organ_n i_o suppose_v therefore_o that_o by_o the_o continual_a action_n of_o object_n to_o which_o a_o reaction_n of_o the_o organ_n and_o more_o esqecial_o of_o the_o spirit_n be_v necessary_o consequent_a the_o organ_n be_v weary_v that_o be_v its_o part_n be_v no_o long_o move_v by_o the_o spirit_n without_o some_o pain_n and_o consequent_o the_o nerve_n be_v abandon_v and_o grow_v slack_a they_o retire_v to_o their_o fountain_n which_o be_v the_o cavity_n either_o of_o the_o brain_n or_o of_o the_o heart_n by_o which_o mean_v the_o action_n which_o proceed_v by_o the_o nerve_n be_v necessary_o intercept_v for_o action_n upon_o a_o patient_n that_o retire_v from_o it_o make_v but_o little_a impression_n at_o the_o first_o and_o at_o last_o when_o the_o nerve_n be_v by_o little_a and_o little_o slacken_v none_o at_o all_o and_o therefore_o there_o be_v no_o more_o reaction_n that_o be_v no_o more_o sense_n till_o the_o organ_n be_v refresh_v by_o rest_n and_o by_o a_o supply_n of_o new_a spirit_n recover_v strength_n and_o motion_n the_o sentient_n awake_v and_o thus_o it_o seem_v to_o be_v always_o unless_o some_o other_o preternatural_a cause_n intervene_v as_o heat_n in_o the_o internal_a part_n from_o lassitude_n or_o from_o some_o disease_n stir_v the_o spirit_n and_o other_o part_n of_o the_o organ_n in_o some_o extraordinary_a manner_n 8_o now_o it_o be_v not_o without_o cause_n nor_o so_o casual_a a_o thing_n as_o many_o perhaps_o think_v it_o that_o phantasm_n in_o this_o their_o great_a variety_n proceed_v from_o one_o another_o and_o that_o the_o same_o phantasm_n sometime_o bring_v into_o the_o mind_n other_o phantasm_n like_o themselves_o and_o at_o other_o time_n extreme_o unlike_a for_o in_o the_o motion_n of_o any_o continue_a body_n one_o part_n follow_v another_o by_o cohaesion_n and_o therefore_o whilst_o we_o turn_v our_o eye_n and_o other_o organ_n successive_o to_o many_o object_n the_o motion_n which_o be_v make_v by_o every_o one_o of_o they_o remain_v the_o phantasm_n be_v renew_v as_o often_o as_o any_o of_o those_o motion_n come_v to_o be_v predominant_a above_o the_o rest_n and_o they_o become_v predominant_a in_o the_o same_o order_n in_o which_o at_o any_o time_n former_o they_o be_v generate_v by_o sense_n so_o that_o when_o by_o length_n of_o time_n very_o many_o phantasm_n have_v be_v generate_v within_o we_o by_o sense_n than_o almost_o any_o thought_n may_v arise_v from_o any_o other_o thought_n in_o so_o much_o that_o it_o may_v seem_v to_o be_v a_o thing_n indifferent_a and_o casual_a which_o thought_n shall_v follow_v which_o but_o for_o the_o most_o part_n this_o be_v not_o so_o uncertain_a a_o thing_n to_o wake_v as_o to_o sleep_a man_n for_o the_o thought_n or_o phantasm_n of_o the_o desire_a end_n bring_v in_o all_o the_o phantasm_n that_o be_v mean_n conduce_v to_o that_o end_n and_o that_o in_o order_n backwards_o from_o the_o last_o to_o the_o first_o and_o again_o forward_o from_o the_o beginning_n to_o the_o end_n but_o this_o suppose_v both_o appetite_n and_o judgement_n to_o discern_v what_o mean_v conduce_v to_o the_o end_n which_o be_v get_v by_o experience_n and_o experience_n be_v store_n of_o phantasm_n arise_v from_o the_o sense_n of_o very_a many_o thing_n for_o 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d and_o meminisse_fw-la fancy_n and_o memory_n differ_v only_o in_o this_o that_o memory_n suppose_v the_o time_n past_a which_o fancy_n do_v not_o in_o memory_n the_o phantasm_n we_o consider_v be_v as_o if_o they_o be_v wear_v out_o with_o time_n but_o in_o our_o fancy_n we_o consider_v they_o as_o they_o be_v which_o distinction_n be_v not_o of_o the_o thing_n themselves_o but_o of_o the_o consideration_n of_o the_o sentient_a for_o there_o be_v in_o memory_n something_o like_o that_o which_o happen_v in_o look_v upon_o thing_n at_o a_o great_a distance_n in_o which_o as_o the_o small_a part_n of_o the_o object_n be_v not_o discern_v by_o reason_n of_o their_o remoteness_n so_o in_o memory_n many_o accident_n and_o place_n and_o part_n of_o thing_n which_o be_v former_o perceive_v by_o sense_n be_v by_o length_n of_o time_n decay_v and_o lose_v the_o perpetual_a arise_v of_o phantasm_n both_o in_o sense_n and_o imagination_n be_v that_o which_o we_o common_o call_v discourse_n of_o the_o mind_n and_o be_v common_a to_o man_n with_o other_o live_a creature_n for_o he_o thta_fw-la think_v compare_v the_o phantasm_n that_o pass_v that_o be_v take_v notice_n of_o their_o likeness_n or_o unlikeness_n to_o one_o another_o and_o as_o he_o that_o observe_v ready_o the_o likeness_n of_o thing_n of_o different_a nature_n or_o that_o be_v very_o remote_a from_o one_o another_o be_v say_v to_o have_v a_o good_a fancy_n so_o he_o be_v say_v to_o have_v a_o good_a judgement_n that_o find_v out_o the_o unlikeness_n or_o difference_n of_o thing_n that_o be_v like_o one_o another_o now_o this_o observation_n of_o difference_n be_v not_o perception_n make_v by_o a_o common_a organ_n of_o sense_n distinct_a from_o sense_n or_o perception_n proper_o so_o call_v but_o be_v memory_n of_o the_o difference_n of_o particular_a phantasm_n remain_v for_o some_o time_n as_o the_o distinction_n between_o hot_a and_o lucid_a be_v nothing_o else_o but_o the_o memory_n both_o of_o a_o heat_n and_o of_o a_o enlighten_v object_n 9_o the_o phantasm_n of_o man_n that_o sleep_v be_v dream_n concern_v which_o we_o be_v teach_v by_o experience_n these_o five_o thing_n first_o that_o for_o the_o most_o part_n there_o be_v neither_o order_n nor_o coherence_n in_o they_o second_o that_o we_o dream_v of_o nothing_o but_o what_o be_v compound_v and_o make_v up_o of_o the_o phantasm_n of_o sense_n past_a three_o that_o sometime_o they_o proceed_v as_o in_o those_o that_o be_v drowsy_a from_o the_o interruption_n of_o their_o phantasm_n by_o little_a and_o little_o break_v and_o alter_v through_o sleepiness_n and_o sometime_o also_o they_o begin_v in_o the_o midst_n of_o sleep_n four_o that_o they_o be_v clear_a than_o the_o imagination_n of_o wake_a man_n except_o such_o as_o be_v make_v by_o sense_n itself_o to_o which_o they_o be_v equal_a in_o clearness_n five_o that_o when_o we_o dream_v we_o admire_v neither_o the_o place_n nor_o the_o look_n of_o the_o thing_n that_o appear_v to_o we_o now_o from_o what_o have_v be_v say_v it_o be_v not_o hard_a to_o show_v what_o may_v be_v the_o cause_n of_o these_o phaenomena_n for_o as_o for_o the_o first_o see_v all_o order_n and_o coherence_n proceed_v from_o frequent_a
look_v back_o to_o the_o end_n that_o be_v from_o consultation_n it_o must_v needs_o be_v that_o see_v in_o sleep_n we_o lose_v all_o thought_n of_o the_o end_n our_o phantasm_n succeed_v one_o another_o not_o in_o that_o order_n which_o tend_v to_o any_o end_n but_o as_o it_o happen_v and_o in_o such_o manner_n as_o object_n present_v themselves_o to_o our_o eye_n when_o we_o look_v indifferent_o upon_o all_o thing_n before_o we_o and_o see_v they_o not_o because_o we_o will_v see_v they_o but_o because_o we_o do_v not_o shut_v our_o eye_n for_o than_o they_o appear_v to_o we_o without_o any_o order_n at_o all_o the_o second_o proceed_v from_o this_o that_o in_o the_o silence_n of_o sense_n there_o be_v no_o new_a motion_n from_o the_o object_n and_o therefore_o no_o new_a phantasm_n unless_o we_o call_v that_o new_a which_o be_v compound_v of_o old_a one_o as_o a_o chimaera_n a_o golden_a mountain_n and_o the_o like_a as_o for_o the_o three_o why_o a_o dream_n be_v sometime_o as_o it_o be_v the_o continuation_n of_o sense_n make_v up_o of_o break_a phantasm_n as_o in_o man_n distemper_v with_o sickness_n the_o reason_n be_v manifest_o this_o that_o in_o some_o of_o the_o organ_n sense_n remain_v and_o in_o other_o it_o fail_v but_o how_o some_o phantasm_n may_v be_v revive_v when_o all_o the_o exterior_a organ_n be_v benumb_v with_o sleep_n be_v not_o so_o easy_o show_v nevertheless_o that_o which_o have_v already_o be_v say_v contain_v the_o reason_n of_o this_o also_o for_o whatsoever_o strike_v the_o pia_fw-la mater_fw-la revive_v some_o of_o those_o phantasm_n that_o be_v still_o in_o motion_n in_o the_o brain_n and_o when_o any_o internal_a motion_n of_o the_o heart_n reach_v that_o membrane_n than_o the_o predominant_a motion_n in_o the_o brain_n make_v the_o phantasm_n now_o the_o motion_n of_o the_o heart_n be_v appetite_n and_o aversion_n of_o which_o i_o shall_v present_o speak_v further_o and_o as_o appetite_n and_o aversion_n be_v generate_v by_o phantasm_n so_o reciprocal_o phantasm_n be_v generate_v by_o appetite_n and_o aversion_n for_o example_n heat_v in_o the_o heart_n proceed_v from_o anger_n and_o fight_v and_o again_o from_o heat_n in_o the_o heart_n whatsoever_o be_v the_o cause_n of_o it_o be_v generate_v anger_n and_o the_o image_n of_o a_o enemy_n in_o sleep_n and_o as_o love_n and_o beauty_n stir_v up_o heat_n in_o certain_a organ_n so_o heat_v in_o the_o same_o organ_n from_o whatsoever_o it_o proceed_v often_o cause_v desire_n and_o the_o image_n of_o a_o unresisted_a beauty_n last_o cold_a do_v in_o the_o same_o manner_n generate_v fear_n in_o those_o that_o sleep_n and_o cause_v they_o to_o dream_v of_o ghost_n and_o to_o have_v phantasm_n of_o horror_n and_o danger_n as_o fear_v also_o cause_v cold_a in_o those_o that_o wake_v so_o reciprocal_a be_v the_o motion_n of_o the_o heart_n and_o brain_n the_o four_o namely_o that_o the_o thing_n we_o seem_v to_o see_v and_o feel_v in_o sleep_n be_v as_o clear_a as_o in_o sense_n itself_o proceed_v from_o two_o cause_n one_o that_o have_v then_o no_o sense_n of_o thing_n without_o we_o that_o internal_a motion_n which_o make_v the_o phantasm_n in_o the_o absence_n of_o all_o other_o impression_n be_v predominant_a and_o the_o other_o that_o the_o part_n of_o our_o phantasm_n which_o be_v decay_v and_o wear_v out_o by_o time_n be_v make_v up_o with_o other_o fictitious_a part_n to_o conclude_v when_o we_o dream_v we_o do_v not_o wonder_v at_o strange_a place_n and_o the_o appearance_n of_o thing_n unknown_a to_o we_o because_o admiration_n require_v that_o the_o thing_n appear_v be_v new_a and_o unusual_a which_o can_v happen_v to_o none_o but_o those_o that_o remember_v former_a appearance_n whereas_o in_o sleep_n all_o thing_n appear_v as_o present_v but_o it_o be_v here_o to_o be_v observe_v that_o certain_a dream_n especial_o such_o as_o some_o man_n have_v when_o they_o be_v between_o sleep_v and_o wake_v and_o such_o as_o happen_v to_o those_o that_o have_v no_o knowledge_n of_o the_o nature_n of_o dream_n and_o be_v with_o all_o superstitious_a be_v not_o heretofore_o nor_o be_v now_o account_v dream_n for_o the_o apparition_n man_n think_v they_o see_v and_o the_o voice_n they_o think_v they_o hear_v in_o sleep_n be_v not_o believe_v to_o be_v phantasm_n but_o thing_n subsist_v of_o themselves_o and_o object_n without_o those_o that_o dream_v for_o to_o some_o man_n as_o well_o sleep_v as_o wake_v but_o especial_o to_o guilty_a man_n and_o in_o the_o night_n and_o in_o hallow_a place_n fear_v alone_o help_v a_o little_a with_o the_o story_n of_o such_o apparition_n have_v raise_v in_o their_o mind_n terrible_a phantasm_n which_o have_v be_v and_o be_v still_o deceitful_o receive_v for_o thing_n real_o true_a under_o the_o name_n of_o ghost_n and_o incorporeal_a substance_n 10_o in_o most_o live_a creature_n there_o be_v observe_v five_o kind_n of_o sense_n which_o be_v distinguish_v by_o their_o organ_n and_o by_o their_o different_a kind_n of_o phantasm_n namely_o sight_n hear_v smell_v taste_n and_o touch_v and_o these_o have_v their_o organ_n partly_o peculiar_a to_o each_o of_o they_o several_o and_o partly_o common_a to_o they_o all_o the_o organ_n of_o sight_n be_v partly_o animate_v and_o partly_o inanimate_a the_o inanimate_a part_n be_v the_o three_o humour_n namely_o the_o watery_a humour_n which_o by_o the_o interposition_n of_o the_o membrane_n call_v uâ—ea_n the_o perforation_n whereof_o be_v call_v the_o apple_n of_o the_o eye_n be_v contain_v on_o one_o side_n by_o the_o first_o concave_a superficies_n of_o the_o eye_n and_o on_o the_o other_o side_n by_o the_o ciliary_a process_n and_o the_o coat_n of_o the_o crystalline_a humour_n the_o crystalline_a which_o hang_v in_o the_o midst_n between_o the_o ciliary_a process_n and_o be_v almost_o of_o spherical_a figure_n and_o of_o a_o thick_a consistence_n be_v enclose_v on_o all_o side_n with_o its_o own_o transparent_a coat_n and_o the_o vitreous_a or_o glassy_a humour_n which_o fill_v all_o the_o rest_n of_o the_o cavity_n of_o the_o eye_n and_o be_v somewhat_o thick_a than_o the_o watery_a humour_n but_o thin_a than_o the_o crystalline_a the_o animate_v part_n of_o the_o organ_n be_v first_o the_o membrane_n choroeides_n which_o be_v a_o part_n of_o the_o pia_fw-la mater_fw-la save_v that_o it_o be_v cover_v with_o a_o coat_n derive_v from_o the_o marrow_n of_o the_o optic_a nerve_n which_o be_v call_v the_o retina_fw-la and_o this_o choroeides_n see_v it_o be_v part_n of_o the_o pia_fw-la mater_fw-la be_v continue_v to_o the_o begin_n of_o the_o medulla_n spinalis_fw-la within_o the_o scull_n in_o which_o all_o the_o nerve_n which_o be_v within_o the_o head_n have_v their_o root_n wherefore_o all_o the_o animal_n spirit_n that_o the_o nerve_n receive_v enter_v into_o they_o there_o for_o it_o be_v not_o imaginable_a that_o they_o can_v enter_v into_o they_o any_o where_o else_o see_v therefore_o sense_n be_v nothing_o else_o but_o the_o action_n of_o object_n propagate_v to_o the_o further_a part_n of_o the_o organ_n and_o see_v also_o that_o animal_n spirit_n be_v nothing_o but_o vital_a spirit_n purify_v by_o the_o hart_n and_o carry_v from_o it_o by_o the_o artery_n it_o follow_v necessary_o that_o the_o action_n be_v derive_v from_o the_o heart_n by_o some_o of_o the_o artery_n to_o the_o root_n of_o the_o nerve_n which_o be_v in_o the_o head_n whether_o those_o artery_n be_v the_o plexus_fw-la retiformis_fw-la or_o whether_o they_o be_v other_o artery_n which_o be_v insert_v into_o the_o substance_n of_o the_o brain_n and_o therefore_o those_o artery_n be_v the_o compliment_n or_o the_o remay_v part_n of_o the_o whole_a organ_n of_o sight_n and_o this_o last_o part_n be_v a_o common_a organ_n to_o all_o the_o sense_n whereas_o that_o which_o reach_v from_o the_o eye_n to_o the_o root_n of_o the_o nerve_n be_v proper_a only_a to_o sight_n the_o proper_a organ_n of_o hear_v be_v the_o tympanum_fw-la of_o the_o ear_n and_o its_o own_o nerve_n from_o which_o to_o the_o heart_n the_o organ_n be_v common_a so_o the_o proper_a organ_n of_o smell_n &_o taste_n be_v nervous_a membrane_n in_o the_o palate_n and_o tongue_n for_o the_o taste_n and_o in_o the_o nostril_n for_o the_o smell_n and_o from_o the_o root_n of_o those_o nerve_n to_o the_o heart_n all_o be_v common_a last_o â—he_v proper_a organ_n of_o touch_n be_v nerve_n and_o membrane_n disperse_v through_o the_o whole_a body_n which_o membrane_n be_v derive_v from_o the_o root_n of_o the_o nerve_n and_o all_o thing_n else_o belong_v alike_o to_o all_o the_o sense_n seem_v to_o be_v administer_v by_o the_o artery_n and_o not_o by_o the_o nerve_n the_o proper_a phantasm_n of_o sight_n be_v light_a and_o under_o this_o name_n of_o light_n colour_v also_o which_o be_v
which_o be_v do_v the_o excentricity_n of_o the_o earth_n will_v be_v cf._n see_v therefore_o the_o annual_a motion_n of_o the_o earth_n be_v in_o the_o circumference_n of_o a_o ellipsis_n of_o which_o ♑_o ♋_o be_v the_o great_a axis_n ab_fw-la can_v be_v the_o lesser_a axis_n for_o ab_fw-la and_o ♑_o ♋_o be_v equal_a wherefore_o the_o earth_n pass_v through_o a_o &_o b_o will_v either_o pass_v above_o ♑_o as_o through_o g_o or_o pass_v through_o ♑_o will_n fall_n between_o c_o and_o a_o it_o be_v no_o matter_n which_o let_v it_o pass_v therefore_o through_o g_o and_o let_v gl_o be_v take_v equal_a to_o the_o straight_a line_n ♑_o ♋_o and_o divide_v gl_o equal_o in_o i_o gi_z will_v be_v equal_a to_o ♑_o ♋_o &_o ill_a equal_a to_o f_o ♋_o and_o consequent_o the_o point_n i_o will_v cut_v the_o excentricity_n cf_n into_o two_o equal_a part_n and_o take_v ih_v equal_a to_o if_o hi_o will_v be_v the_o whole_a excentricity_n if_o now_o a_o straight_a line_n namely_o the_o line_n ♎_o i_o ♈_o be_v draw_v through_o i_o parallel_n to_o the_o straight_a line_n ab_fw-la and_o ed_z the_o way_n of_o the_o sun_n in_o summer_n namely_o the_o arch_n ♎_o g_o ♈_o will_v be_v great_a than_o his_o way_n in_o winter_n by_o 8_o degree_n and_o ¼_n wherefore_o the_o true_a aequinox_n will_v be_v in_o the_o straight_a line_n ♎_o i_o ♈_o and_o therefore_o the_o ellipsis_n of_o the_o earth_n annual_a motion_n will_v not_o pass_v through_o a_o g_o b_o &_o l_o but_o through_o ♎_o g_o ♈_o &_o l._n wherefore_o the_o annual_a motion_n of_o the_o earth_n be_v in_o the_o ellipsis_n ♎_o g_o ♈_o l_o and_o can_v be_v the_o excentricity_n be_v salve_v in_o any_o other_o line_n and_o this_o perhaps_o be_v the_o reason_n why_o kepler_n against_o the_o opinion_n of_o all_o the_o astronomer_n of_o former_a time_n think_v fit_a to_o bisect_v the_o excentricity_n of_o the_o earth_n or_o according_a to_o the_o ancient_n of_o the_o sun_n not_o by_o diminish_v the_o quantity_n of_o the_o same_o excentricity_n because_o the_o true_a measure_n of_o that_o quantity_n be_v the_o difference_n by_o which_o the_o summer_n arch_n exceed_v the_o winter_n arch_n but_o by_o take_v for_o the_o centre_n of_o the_o ecliptic_a of_o the_o great_a orb_n the_o point_n c_o near_o to_o f_o &_o so_o place_v the_o whole_a great_a orb_n as_o much_o near_a to_o the_o ecliptic_a of_o the_o fix_a star_n towards_o ♋_o as_o be_v the_o distance_n between_o c_o &_o i._o for_o see_v the_o whole_a great_a orb_n be_v but_o as_o a_o point_n in_o respect_n of_o the_o immense_a distance_n of_o the_o fix_a star_n the_o two_o straight_a line_n ♎_o ♈_o and_o ab_fw-la be_v produce_v both_o way_n to_o the_o beginning_n of_o aries_n and_o libra_n will_v fall_v upon_o the_o same_o point_n of_o the_o sphere_n of_o the_o fix_a star_n let_v therefore_o the_o diameter_n of_o the_o earth_n mn_v be_v in_o the_o plain_a of_o the_o earth_n annual_a motion_n if_o now_o the_o earth_n be_v move_v by_o the_o sun_n simple_a motion_n in_o the_o circumference_n of_o the_o ecliptic_a about_o the_o centre_n i_o this_o diameter_n will_v be_v keep_v always_o parallel_v to_o itself_o and_o to_o the_o straight_a line_n gl_o but_o see_v the_o earth_n be_v move_v in_o the_o circumference_n of_o a_o ellipsis_n without_o the_o ecliptic_a the_o point_n n_o whilst_o it_o pass_v through_o ♎_o ♑_o ♈_o will_n go_v in_o a_o lesser_a circumference_n than_o the_o point_n m_o and_o consequent_o as_o soon_o as_o ever_o it_o begin_v to_o be_v move_v it_o will_v lose_v its_o parallelisme_n with_o the_o straight_a line_n ♑_o ♋_o so_o that_o mn_v produce_v will_n at_o last_o cut_v the_o straight_a line_n gl_o produce_v and_o contrary_o as_o soon_o as_o mn_n be_v pass_v ♈_o the_o earth_n make_v its_o way_n in_o the_o internal_a ellipticall_a line_n ♈_o l_o ♎_o the_o same_o mn_v produce_v towards_o m_o will_v cut_v lg_v produce_v and_o when_o the_o earth_n have_v almost_o finish_v its_o whole_a circumference_n the_o same_o mn_v shall_v again_o make_v a_o right_a angle_n with_o a_o line_n draw_v from_o the_o centre_n i_o a_o little_a short_a of_o the_o point_n from_o which_o the_o earth_n begin_v its_o motion_n and_o there_o the_o next_o year_n shall_v be_v one_o of_o the_o aequinoctial_a point_n namely_o near_o the_o end_n of_o â™_o the_o other_o shall_v be_v opposite_a to_o it_o near_o the_o end_n of_o ♓_o and_o thus_o the_o point_n in_o which_o the_o day_n and_o night_n be_v make_v equal_a do_v every_o year_n fall_v back_o but_o with_o so_o slow_a a_o motion_n that_o in_o a_o whole_a year_n it_o make_v but_o 51_o first_o minute_n and_o this_o relapse_n be_v contrary_a to_o the_o order_n of_o the_o sign_n be_v common_o call_v the_o praecession_n of_o the_o aequinox_n of_o which_o i_o have_v from_o my_o former_a supposition_n deduce_v a_o possible_a cause_n which_o be_v to_o be_v do_v according_a to_o what_o i_o have_v say_v concern_v the_o cause_n of_o the_o excentricity_n of_o the_o earth_n and_o according_a to_o kepler_n who_o for_o the_o cause_n thereof_o suppose_v one_o part_n of_o the_o earth_n to_o be_v affect_v to_o the_o sun_n the_o other_o part_n to_o be_v disaffect_v the_o apogaeum_n &_o perigaeum_n of_o the_o sun_n shall_v be_v move_v every_o year_n in_o the_o same_o order_n and_o with_o the_o same_o velocity_n with_o which_o the_o aequinoctial_a point_n be_v move_v and_o their_o distance_n from_o they_o shall_v always_o be_v the_o quadrant_a of_o a_o circle_n which_o seem_v to_o be_v otherwise_o for_o astronomer_n say_v that_o the_o aequinox_n be_v now_o the_o one_o about_o 28_o degree_n go_v back_o from_o the_o first_o star_n of_o aries_n the_o other_o as_o much_o from_o the_o begin_n of_o libra_n so_o that_o the_o apogaeum_n of_o the_o sun_n or_o the_o aphelium_n of_o the_o earth_n ought_v to_o be_v about_o the_o 28_o degree_n of_o cancer_n but_o it_o be_v reckon_v to_o be_v in_o the_o seven_o degree_n see_v therefore_o we_o have_v not_o sufficient_a evidence_n of_o the_o 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d that_o so_o it_o be_v it_o be_v in_o vain_a to_o seek_v for_o the_o 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d why_o it_o be_v so_o wherefore_o as_o long_o as_o the_o motion_n of_o the_o apogaeum_n be_v not_o observable_a by_o reason_n of_o the_o slowness_n thereof_o and_o as_o long_o as_o it_o remaive_v doubtful_a whether_o their_o distance_n from_o the_o aequinoctial_a point_n be_v more_o or_o less_o than_o a_o quadrant_a precise_o so_o long_v it_o may_v be_v lawful_a for_o i_o to_o think_v they_o proceed_v both_o of_o they_o with_o equal_a velocity_n also_o i_o do_v not_o at_o all_o meddle_v with_o the_o cause_n of_o the_o excentricity_n of_o saturn_n jupiter_n mars_n and_o mercury_n nevertheless_o see_v the_o excentricity_n of_o the_o earth_n may_v as_o i_o have_v show_v be_v cause_v by_o the_o unlike_a constitution_n of_o the_o several_a part_n of_o the_o earth_n which_o be_v alternate_o turn_v towards_o the_o sun_n it_o be_v credible_a also_o that_o like_a effect_n may_v be_v produce_v in_o these_o other_o planet_n from_o their_o have_v their_o superficies_n of_o unlike_a part_n and_o this_o be_v all_o i_o shall_v say_v concern_v sidereal_a philosophy_n and_o though_o the_o cause_n i_o have_v here_o suppose_v be_v not_o the_o true_a cause_n of_o these_o phaenomena_n yet_o i_o have_v demonstrate_v that_o they_o be_v sufficient_a to_o produce_v they_o according_a to_o what_o i_o at_o first_o propound_v chap._n xxvii_o of_o light_n heatt_z and_o of_o colour_n 1_o of_o the_o immense_a magnitude_n of_o some_o body_n and_o the_o unspeakable_a littleness_n of_o other_o 2_o of_o the_o cause_n of_o the_o light_n of_o the_o sun_n 3_o how_o light_n heat_v 4_o the_o generation_n of_o fire_n from_o the_o sun_n 5_o the_o generation_n of_o fire_n from_o collision_n 6_o the_o cause_n of_o light_n in_o glow-worm_n rot_a wood_n and_o the_o bolonian_a stone_n 7_o the_o cause_n of_o light_n in_o the_o concussion_n of_o sea-water_n 8_o the_o cause_n of_o flame_n spark_n and_o colliquation_n 9_o the_o cause_n why_o wet_a hay_n sometime_o burn_v of_o its_o own_o accord_n also_o the_o cause_n of_o lightning_n 10_o the_o cause_n of_o the_o force_n of_o gunpowder_n and_o what_o be_v to_o be_v ascribe_v to_o the_o coal_n what_o to_o the_o brimstone_n and_o what_o to_o the_o nitre_n 11_o how_o heat_n be_v cause_v by_o attrition_n 12_o the_o distinction_n of_o light_n into_o first_o second_o etc._n etc._n 13_o the_o cause_n of_o the_o colour_n we_o see_v in_o look_v through_o a_o prisma_fw-la of_o glass_n namely_o of_o red_a yellow_a blue_a and_o violet_a colour_n 14_o why_o the_o moon_n and_o the_o star_n appear_v red_a in_o the_o horizon_n then_o in_o
of_o this_o evocation_n and_o swell_v and_o such_o as_o agree_v with_o the_o rest_n of_o the_o phaenomena_n of_o heat_n may_v be_v think_v to_o have_v give_v the_o cause_n of_o the_o heat_n of_o the_o sun_n it_o have_v be_v show_v in_o the_o 5_o article_n of_o the_o 21_o chapter_n that_o the_o fluid_fw-la medium_fw-la which_o we_o call_v the_o air_n be_v so_o move_v by_o the_o simple_a circular_a motion_n of_o the_o sun_n as_o that_o all_o its_o part_n even_o the_o least_o do_v perpetual_o change_v place_n with_o one_o another_o which_o change_n of_o place_n be_v that_o which_o there_o i_o call_v fermentation_n from_o this_o fermentation_n of_o the_o air_n i_o have_v in_o the_o 8_o article_n of_o the_o last_o chapter_n demonstrate_v that_o the_o water_n may_v be_v draw_v up_o into_o the_o cloud_n and_o i_o shall_v now_o show_v that_o the_o fluid_a part_n may_v in_o like_a manner_n by_o the_o same_o fermentation_n be_v draw_v out_o from_o the_o internal_a to_o the_o external_a part_n of_o our_o body_n for_o see_v that_o wheresoever_o the_o fluid_fw-la medium_fw-la be_v contiguous_a to_o the_o body_n of_o any_o live_a creature_n there_o the_o part_n of_o that_o medium_fw-la be_v by_o perpetual_a change_n of_o place_n separate_v from_o one_o another_o the_o contiguous_a part_n of_o the_o live_a creature_n must_v of_o necessity_n endeavour_v to_o enter_v into_o the_o space_n of_o the_o separate_a part_n for_o otherwise_o those_o part_n suppose_v there_o be_v no_o vacuum_n will_v have_v no_o place_n to_o go_v into_o and_o therefore_o that_o which_o be_v most_o fluid_a and_o separable_a in_o the_o part_n of_o the_o live_a creature_n which_o be_v contiguous_a to_o the_o medium_fw-la will_v go_v first_o out_o and_o into_o the_o place_n thereof_o will_v succeed_v such_o other_o part_n as_o can_v most_o easy_o transpire_v through_o the_o poâ—es_n of_o the_o skin_n and_o from_o hence_o it_o be_v necessary_a that_o the_o rest_n of_o the_o part_n which_o be_v not_o separate_v must_v all_o together_o be_v move_v outward_o for_o the_o keep_n of_o all_o place_n full_a but_o this_o motion_n outward_o of_o all_o part_n together_o must_v of_o necessity_n press_v those_o part_n of_o the_o ambient_fw-la aire_n which_o be_v ready_a to_o leave_v their_o place_n and_o therefore_o all_o the_o part_n of_o the_o body_n endeavour_v at_o once_o that_o way_n make_v the_o body_n swell_v wherefore_o a_o possible_a cause_n be_v give_v of_o heat_n from_o the_o sun_n which_o be_v to_o be_v do_v 4_o we_o have_v now_o see_v how_o light_n and_o heat_n be_v generate_v heat_v by_o the_o simple_a motion_n of_o the_o medium_fw-la make_v the_o part_n perpetual_o change_v place_n with_o one_o another_o and_o light_n by_o this_o that_o by_o the_o same_o simple_a motion_n action_n be_v propagate_v in_o a_o straight_a line_n but_o when_o a_o body_n have_v its_o part_n so_o move_v that_o it_o sensible_o both_o heat_n and_o shine_v at_o the_o same_o time_n than_o it_o be_v that_o we_o say_v fire_n be_v generate_v now_o by_o fire_n i_o do_v not_o understand_v a_o body_n distinct_a from_o matter_n combustible_a or_o glow_a as_o wood_n or_o iron_n but_o the_o matter_n itself_o not_o simple_o and_o always_o but_o then_o only_o when_o it_o shine_v and_o heat_v he_o therefore_o that_o render_v a_o cause_n possible_a and_o agreeable_a to_o the_o rest_n of_o the_o phaenomena_n namely_o whence_o and_o from_o what_o action_n both_o the_o shine_v and_o heat_n proceed_v may_v be_v think_v to_o have_v give_v a_o possible_a cause_n of_o the_o generation_n of_o fire_n let_v therefore_o abc_n in_o the_o first_o figure_n be_v a_o sphere_n or_o the_o portion_n of_o a_o sphere_n who_o centre_n be_v d_o and_o let_v it_o be_v transparent_a and_o homogeneous_a as_o crystal_n glass_n or_o water_n and_o object_v to_o the_o sun_n wherefore_o the_o foremost_a part_n abc_n will_v by_o the_o simple_a motion_n of_o the_o sun_n by_o which_o it_o thrust_v forward_o the_o medium_fw-la be_v wrought_v upon_o by_o the_o sunbeam_n in_o the_o straight_a line_n ea_fw-la fb_fw-la and_o gc_fw-la which_o straight_o line_n may_v in_o respect_n of_o the_o great_a distance_n of_o the_o sun_n be_v take_v for_o parallel_n and_o see_v the_o medium_fw-la within_o the_o sphere_n be_v thick_a than_o the_o medium_fw-la without_o it_o those_o beam_n will_v be_v refract_v towards_o their_o perpendicular_o let_v the_o straight_a line_n ea_z and_o gc_fw-la be_v produce_v till_o they_o cut_v the_o sphere_n in_o h_n and_o i_o and_o draw_v the_o perpendicular_n ad_fw-la and_o cd_o the_o refracted_a beam_n ea_z and_o gc_fw-la will_v of_o necessity_n fall_v the_o one_o between_o ah_o and_o ad_fw-la the_o other_o between_o ci_o and_o cd_o let_v those_o refracted_a beam_n be_v ak_a and_o cl._n and_o again_o let_v the_o line_n dkm_n &_o dln_n be_v draw_v perpendicular_a to_o the_o sphere_n and_o let_v ak_a and_o cl_n be_v produce_v till_o they_o meet_v with_o the_o straight_a line_n bd_o produce_v in_o o._n see_v therefore_o the_o medium_fw-la within_o the_o sphere_n be_v thick_a than_o that_o without_o it_o the_o refracted_a line_n ak_v will_v recede_v further_o from_o the_o perpendicular_a km_n then_o quoth_fw-mi will_v recede_v from_o the_o same_o wherefore_o quoth_fw-mi will_n fall_n between_o the_o refracted_a line_n and_o the_o perpendicular_a let_v therefore_o the_o refracted_a line_n be_v kp_n cut_a foe_n in_o p_o and_o for_o the_o same_o reason_n the_o straight_a line_n lp_n will_v be_v the_o refracted_a line_n of_o the_o straight_a line_n cl._n wherefore_o see_v the_o beam_n be_v nothing_o else_o but_o the_o way_n in_o which_o the_o motion_n be_v propagate_v the_o motion_n about_o p_o will_v be_v so_o much_o more_o vehement_a than_o the_o motion_n about_o abc_n by_o how_o much_o the_o base_a of_o the_o portion_n abc_n be_v great_a than_o the_o base_a of_o a_o like_a portion_n in_o the_o sphere_n who_o centre_n be_v p_o and_o who_o magnitude_n be_v equal_a to_o that_o of_o the_o little_a circle_n about_o p_o which_o comprehend_v all_o the_o beam_n that_o be_v propagate_v from_o abc_n and_o this_o sphere_n be_v much_o less_o than_o the_o sphere_n abc_n the_o part_n of_o the_o medium_fw-la that_o be_v of_o the_o air_n about_o p_o will_v change_v place_n with_o one_o another_o with_o much_o great_a celerity_n than_o those_o about_o abc_n if_o therefore_o any_o matter_n combustible_a that_o be_v to_o say_v such_o as_o may_v be_v easy_o dissipate_v be_v place_v in_o p_o the_o part_n of_o that_o matter_n if_o the_o proportion_n be_v great_a enough_o between_o ac_fw-la and_o a_o like_a portion_n of_o the_o little_a circle_n about_o p_o will_v be_v free_v from_o their_o mutual_a cohaesion_n and_o be_v separate_v will_v acquire_v simple_a motion_n but_o vehement_a simple_a motion_n generate_v in_o the_o beholder_n a_o phantasm_n of_o lucid_n and_o hot_a as_o i_o have_v before_o demonstrate_v of_o the_o simple_a motion_n of_o the_o sun_n and_o therefore_o the_o combustible_a matter_n which_o be_v place_v in_o p_o will_v be_v make_v lucid_n and_o hot_a that_o be_v to_o say_v will_v be_v fire_n wherefore_o i_o have_v render_v a_o possible_a cause_n of_o fire_n which_o be_v to_o be_v do_v 5_o from_o the_o manner_n by_o which_o the_o sun_n generate_v fire_n it_o be_v easy_a to_o explain_v the_o manner_n by_o which_o fire_n may_v be_v generate_v by_o the_o collision_n of_o two_o flint_n for_o by_o that_o collision_n some_o of_o those_o particle_n of_o which_o the_o stone_n be_v compact_v be_v violent_o separate_v and_o throw_v off_o and_o be_v withal_o swift_o turn_v round_o the_o eye_n be_v move_v by_o they_o as_o it_o be_v in_o the_o generation_n of_o light_n by_o the_o sun_n wherefore_o they_o shine_v and_o fall_v upon_o matter_n which_o be_v already_o half_o dissipate_v such_o as_o be_v tinder_n they_o thorough_o dissipate_v the_o part_n thereof_o and_o make_v they_o turn_v round_o from_o whence_o as_o i_o have_v new_o show_v light_n and_o heat_n that_o be_v to_o say_v fire_n be_v generate_v 6_o the_o shine_a of_o glow-worm_n some_o kind_n of_o rot_a wood_n and_o of_o a_o kind_n of_o stone_n make_v at_o bolognia_n may_v have_v one_o common_a cause_n namely_o the_o expose_v of_o they_o to_o the_o hot_a sun_n we_o find_v by_o experience_n that_o the_o bolonian_a stone_n shine_v not_o unless_o it_o be_v so_o expose_v and_o after_o it_o have_v be_v expose_v it_o shine_v but_o for_o a_o little_a time_n namely_o as_o long_o as_o it_o retain_v a_o certain_a degree_n of_o heat_n and_o the_o cause_n may_v be_v that_o the_o part_n of_o which_o it_o be_v make_v may_v together_o with_o heat_n have_v simple_a motion_n imprint_v in_o they_o by_o the_o sun_n which_o if_o it_o be_v so_o it_o be_v necessary_a that_o it_o shine_v in_o the_o dark_a as_o
as_o water_n 8_o another_o cause_n of_o hardness_n from_o the_o full_a contact_n of_o atom_n also_o how_o hard_a thing_n be_v break_v 9_o a_o three_o cause_n of_o hardness_n from_o heat_n 10_o a_o four_o cause_n of_o hardness_n from_o the_o motion_n of_o atom_n enclose_v in_o a_o narrow_a space_n 11_o how_o hard_a thing_n be_v soften_v 12_o whence_o proceed_v the_o spontaneous_a restitution_n of_o thing_n bent._n 13_o diaphanous_a and_o opacous_a what_o they_o be_v and_o whence_o 14_o the_o cause_n of_o lightning_n and_o thunder_n 15_o whence_o it_o proceed_v that_o cloud_n can_v fall_v again_o after_o they_o be_v once_o elevate_v and_o freeze_a 16_o how_o it_o can_v be_v that_o the_o moon_n be_v eclipse_v when_o she_o be_v not_o diametral_o opposite_a to_o the_o sun_n 17_o by_o what_o mean_v many_o sun_n may_v appear_v at_o once_o 18_o of_o the_o head_n of_o river_n 1_o as_o when_o the_o motion_n of_o the_o ambient_fw-la aethereal_a substance_n make_v the_o spirit_n and_o fluid_a part_n of_o our_o body_n tend_v outward_o we_o acknowledge_v heat_n so_o by_o the_o endeavour_n inward_o of_o the_o same_o spirit_n and_o humour_n we_o feel_v cold._a so_o that_o to_o cool_v be_v to_o make_v the_o exterior_a part_n of_o the_o body_n endeavour_v inward_o by_o a_o motion_n contrary_n to_o that_o of_o calefaction_n by_o which_o the_o internal_a part_n be_v call_v outward_o he_o therefore_o that_o will_v know_v the_o cause_n of_o cold_a must_v find_v by_o what_o motion_n or_o motion_n the_o exterior_a part_n of_o any_o body_n endeavour_v to_o retire_v inward_o to_o begin_v with_o those_o phaenomena_n which_o be_v the_o most_o familiar_a there_o be_v almost_o no_o man_n but_o know_v that_o breath_n blow_v strong_o and_o which_o come_v from_o the_o mouth_n with_o violence_n that_o be_v to_o say_v the_o passage_n be_v straight_o will_v cool_v the_o hand_n and_o that_o the_o same_o breath_n blow_v gentle_o that_o be_v to_o say_v through_o a_o great_a aperture_n will_v warm_v the_o same_o the_o cause_n of_o which_o phaenomenon_n may_v be_v this_o the_o breath_n go_v out_o have_v two_o motion_n the_o one_o of_o the_o whole_a and_o direct_a by_o which_o the_o foremost_a part_n of_o the_o hand_n be_v drive_v inward_o the_o other_o simple_a motion_n of_o the_o small_a particle_n of_o the_o same_o breath_n which_o as_o i_o have_v show_v in_o the_o 3d_o article_n of_o the_o last_o chapter_n cause_v heat_n according_a therefore_o as_o either_o of_o these_o motion_n be_v predominant_a so_o there_o be_v the_o sense_n sometime_o of_o cold_a sometime_o of_o heat_n wherefore_o when_o the_o breath_n be_v soft_o breathe_v out_o at_o a_o large_a passage_n that_o simple_a motion_n which_o cause_v heat_n prevail_v and_o consequent_o heat_n be_v feel_v and_o when_o by_o compress_v the_o lip_n the_o breath_n be_v more_o strong_o blow_v out_o then_o be_v the_o direct_a motion_n prevalent_a which_o make_v we_o feel_v cold._a for_o the_o direct_a motion_n of_o the_o breath_n or_o air_n be_v wind_n and_o all_o wind_n cool_v or_o diminish_v former_a heat_n 2_o and_o see_v not_o only_o great_a wind_n but_o almost_o any_o ventilation_n and_o stir_v of_o the_o air_n do_v refrigerate_v the_o reason_n of_o many_o experiment_n concern_v cold_a can_v well_o be_v give_v without_o find_v first_o what_o be_v the_o cause_n of_o wind._n now_o wind_n be_v nothing_o else_o but_o the_o direct_a motion_n of_o the_o air_n thrust_v forward_o which_o nevertheless_o when_o many_o wind_n concur_v may_v be_v circular_a or_o otherwise_o indirect_a as_o it_o be_v in_o whirlwind_n wherefore_o in_o the_o first_o place_n we_o be_v to_o inquire_v into_o the_o cause_n of_o wind_n wind_n be_v aire_n move_v in_o a_o considerable_a quantity_n and_o that_o either_o in_o the_o manner_n of_o wave_n which_o be_v both_o forward_o &_o also_o up_o &_o down_o or_o else_o forward_o only_a suppose_v therefore_o the_o air_n both_o clear_a and_o calm_a for_o any_o time_n how_o little_a soever_o yet_o the_o great_a body_n of_o the_o world_n be_v so_o dispose_v and_o order_v as_o have_v be_v say_v it_o will_v be_v necessary_a that_o a_o wind_n present_o arise_v some_o where_o for_o see_v that_o motion_n of_o the_o part_n of_o the_o air_n which_o be_v make_v by_o the_o simple_a motion_n of_o the_o sun_n in_o his_o own_o epicycle_n cause_v a_o exhalation_n of_o the_o particle_n of_o water_n from_o the_o sea_n and_o all_o other_o moist_a body_n and_o those_o particle_n make_v cloud_n it_o must_v needs_o follow_v that_o while_o the_o particle_n of_o water_n pass_v upward_o the_o particle_n of_o air_n for_o the_o keep_n of_o all_o space_n full_a be_v justle_v out_o on_o every_o side_n and_o urge_v the_o next_o particle_n and_o these_o the_o next_o till_o have_v make_v their_o circuit_n there_o come_v continual_o so_o much_o air_n to_o the_o hinder_a part_n of_o the_o earth_n as_o there_o go_v water_n from_o before_o it_o wherefore_o the_o ascend_a vapour_n move_v the_o air_n towards_o the_o side_n every_o way_n and_o all_o direct_a motion_n of_o the_o air_n be_v wind_n they_o make_v a_o wind._n and_o if_o this_o wind_n meet_v often_o with_o other_o vapour_n which_o arise_v in_o other_o place_n it_o be_v manifest_a that_o the_o force_n thereof_o will_v be_v augment_v &_o the_o way_n or_o course_n of_o it_o change_v beside_o according_a as_o the_o earth_n by_o its_o diurnal_a motion_n turn_v sometime_o the_o dry_a sometime_o the_o moist_a part_n towards_o the_o sun_n so_o sometime_o a_o great_a sometime_o a_o less_o quantity_n of_o vapour_n will_v be_v raise_v that_o be_v to_o say_v sometime_o there_o will_v be_v a_o less_o sometime_o a_o great_a wind._n wherefore_o i_o have_v render_v a_o possible_a cause_n of_o such_o wind_n as_o be_v generate_v by_o vapour_n and_o also_o of_o their_o inconstancy_n from_o hence_o it_o follow_v that_o these_o wind_n can_v be_v make_v in_o any_o place_n which_o be_v high_o than_o that_o to_o which_o vapour_n may_v ascend_v nor_o be_v that_o incredible_a which_o be_v report_v of_o the_o high_a mountain_n as_o the_o pique_n of_o tenariffe_n and_o the_o andes_n of_o peru_n namely_o that_o they_o be_v not_o at_o all_o trouble_a with_o these_o inconstant_a wind_n and_o if_o it_o be_v certain_a that_o neither_o rain_n nor_o snow_n be_v ever_o see_v in_o the_o high_a top_n of_o those_o mountain_n it_o can_v not_o be_v doubt_v but_o that_o they_o be_v high_a than_o any_o place_n to_o which_o vapour_n use_v to_o ascend_v 3_o nevertheless_o there_o may_v be_v wind_n there_o though_o not_o that_o which_o be_v make_v by_o the_o ascent_n of_o vapour_n yet_o a_o less_o &_o more_o constant_a wind_n like_o the_o continue_a blast_n of_o a_o pair_n of_o bellows_o blow_v from_o the_o east_n and_o this_o may_v have_v a_o double_a cause_n the_o one_o the_o diurnal_a mo_z tion_n of_o the_o earth_n the_o other_o its_o simple_a motion_n in_o its_o own_o epicycle_n for_o these_o mountain_n be_v by_o reason_n of_o their_o height_n more_o eminent_a than_o all_o the_o rest_n of_o the_o part_n of_o the_o earth_n do_v by_o both_o these_o motion_n drive_v the_o air_n from_o the_o west_n eastward_n to_o which_o though_o the_o diurnal_a motion_n contribute_v but_o little_a yet_o see_v i_o have_v suppose_v that_o the_o simple_a motion_n of_o the_o earth_n in_o its_o own_o epicycle_n make_v two_o revolution_n in_o the_o same_o time_n in_o which_o the_o diurnal_a motion_n make_v but_o one_o and_o that_o the_o semidiameter_n of_o the_o epicycle_n be_v double_a to_o the_o semidiameter_n of_o the_o diurnal_a conversion_n the_o motion_n of_o every_o point_n of_o the_o earth_n in_o its_o own_o epicycle_n will_v have_v its_o velocity_n quadruple_a to_o that_o of_o the_o diurnal_a motion_n so_o that_o by_o both_o these_o motion_n together_o the_o top_n of_o those_o hill_n will_v sensible_o be_v move_v against_o the_o air_n and_o consequent_o a_o wind_n will_v be_v feel_v for_o whether_o the_o air_n strike_v the_o sentient_a or_o the_o sentient_a the_o air_n the_o perception_n of_o motion_n will_v be_v the_o same_o but_o this_o wind_n see_v it_o be_v not_o cause_v by_o the_o ascent_n of_o vapour_n must_v necessary_o be_v very_o constant._n 4_o when_o one_o cloud_n be_v already_o ascend_v into_o the_o air_n if_o another_o cloud_n ascend_v towards_o it_o that_o part_n of_o the_o air_n which_o be_v intercept_v between_o they_o both_o must_v of_o necessity_n be_v press_v out_o every_o way_n also_o when_o both_o of_o they_o while_o the_o one_o ascend_v and_o the_o other_o either_o stay_v or_o descend_v come_v to_o be_v join_v in_o such_o manner_n as_o that_o the_o aethereal_a substance_n be_v shut_v within_o they_o on_o every_o side_n it_o will_v by_o this_o compression_n also_o go_v out_o by_o penetrate_v the_o water_n
of_o the_o cause_n of_o smell_v i_o shall_v make_v use_n of_o the_o evidence_n of_o these_o follow_a phaenomena_n first_o that_o smell_a be_v hinder_v by_o cold_a and_o help_v by_o heat_n second_o that_o when_o the_o wind_n blow_v from_o the_o object_n the_o smell_n be_v the_o strong_a and_o contrary_o when_o it_o blow_v from_o the_o sentient_a towards_o the_o object_n the_o weak_a both_o which_o phaenomena_n be_v by_o experience_n manifest_o find_v to_o be_v true_a in_o dog_n which_o follow_v the_o tract_n of_o beast_n by_o the_o sent._n three_o that_o such_o body_n as_o be_v less_o pervious_a to_o the_o fluid_fw-la medium_fw-la yield_v less_o smell_n than_o such_o as_o be_v more_o pervious_a as_o may_v be_v see_v in_o stone_n and_o metal_n which_o compare_v with_o plant_n and_o live_a creature_n and_o their_o part_n fruit_n and_o excretion_n have_v very_o little_a or_o no_o smell_n at_o all_o four_o that_o such_o body_n as_o be_v of_o their_o own_o nature_n odorous_a become_v yet_o more_o odorous_a when_o they_o be_v bruise_v five_o that_o when_o the_o breath_n be_v stop_v at_o least_o in_o man_n nothing_o can_v be_v smell_v six_o that_o the_o sense_n of_o smell_a be_v also_o take_v away_o by_o the_o stop_n of_o the_o nostril_n though_o the_o mouth_n be_v leave_v open_a 13_o by_o the_o four_o and_o five_o phaenomenon_n it_o be_v manifest_a that_o the_o first_o and_o immediate_a organ_n of_o smell_a be_v the_o innermost_a cuticle_n of_o the_o nostril_n and_o that_o part_n of_o it_o which_o be_v below_o the_o passage_n common_a to_o the_o nostril_n and_o the_o palate_n for_o when_o we_o draw_v breath_n by_o the_o nostril_n we_o draw_v it_o into_o the_o lung_n that_o breath_n therefore_o which_o convey_v smell_v be_v in_o the_o way_n which_o pass_v to_o the_o lung_n that_o be_v to_o say_v in_o that_o part_n of_o the_o nostril_n which_o be_v below_o the_o passage_n through_o which_o the_o breath_n go_v for_o nothing_o be_v smell_v neither_o beyond_o the_o passage_n 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