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not_o but_o be_v prone_a to_o suspect_v that_o the_o curdle_a matter_n which_o be_v call_v the_o magistery_n of_o vegetable_n may_v have_v in_o it_o no_o inconsiderable_a proportion_n of_o a_o stony_a substance_n precipitate_v out_o of_o the_o allom_n by_o the_o lixivium_n wherein_o the_o vegetable_a have_v be_v decoct_v and_o to_o show_v you_o that_o there_o be_v no_o necessity_n that_o all_o the_o curdled_a substance_n must_v belong_v to_o the_o vegetable_a i_o shall_v add_v that_o i_o take_v a_o strong_a solution_n of_o allom_n and_o have_v filter_v it_o by_o pour_v in_o a_o convenient_a quantity_n of_o a_o strong_a solution_n of_o pot-ash_n i_o present_o as_o i_o expect_v turn_v the_o mixture_n into_o a_o kind_n of_o white_a curd_n which_o be_v put_v to_o filtre_n the_o paper_n retain_v a_o stony_a calx_fw-la copious_a enough_o very_o white_a and_o which_o seem_v to_o be_v of_o a_o mineral_n nature_n both_o by_o some_o other_o sign_n and_o this_o that_o little_a bit_n of_o it_o 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white_a calx_fw-la as_o i_o be_v former_o speak_v of_o out_o of_o a_o limpid_a solution_n of_o allom_n so_o that_o there_o be_v need_n of_o circumspect_a on_o in_o judge_v of_o the_o nature_n of_o liquor_n by_o precipitation_n wherein_o allom_n intervene_v else_o we_o may_v sometime_o mistake_o imagine_v that_o to_o be_v precipitate_v out_o of_o a_o liquor_n by_o allom_n which_o be_v rather_o precipitate_v out_o of_o allom_n by_o the_o liquor_n and_o this_o put_v i_o in_o mind_n to_o tell_v you_o that_o it_o be_v not_o unpleasant_a to_o behold_v how_o quick_o the_o solution_n of_o allom_n or_o injected_a lump_n of_o allom_n do_v occasion_n the_o sever_n of_o the_o colour_a part_n of_o the_o decoction_n from_o the_o liquor_n that_o seem_v to_o have_v so_o perfect_o imbibe_v they_o annot._fw-la 11._o the_o above_o mention_v way_n of_o
instanced_a in_o the_o whiteness_n of_o froth_n and_o in_o the_o mixture_n of_o dry_a colour_a powder_n 30._o a_o further_a explication_n of_o the_o variety_n that_o may_v be_v in_o the_o superficial_a part_n of_o colour_a body_n that_o may_v cause_v that_o effect_n by_o a_o example_n draw_v from_o the_o surface_n of_o the_o earth_n 31._o a_o apology_n for_o that_o gross_a comparison_n 32._o that_o the_o appearance_n of_o the_o superficial_a asperity_n may_v be_v vary_v from_o the_o position_n of_o the_o eye_n and_o several_a instance_n give_v of_o such_o appearance_n 33_o 34_o 35._o that_o the_o appearance_n of_o the_o superficial_a particle_n may_v be_v vary_v also_o by_o their_o motion_n confirm_v by_o a_o instance_n of_o the_o smoke_a liquor_n 35._o especial_o if_o the_o superficial_a part_n be_v of_o such_o a_o nature_n as_o to_o appear_v divers_a in_o several_a posture_n explain_v by_o the_o variety_n of_o colour_n exhibit_v by_o the_o shake_a leave_n of_o some_o plant_n 36._o and_o by_o changeable_a taffity_n 37_o 38_o 39_o the_o author_n wish_v that_o the_o variety_n of_o colour_n in_o mother_n of_o pearl_n be_v examine_v with_o a_o microscope_n 40._o and_o his_o conjecture_n that_o possible_o good_a microscope_n may_v discover_v those_o superficial_a inequality_n to_o be_v real_a which_o we_o now_o only_o imagine_v with_o his_o reason_n draw_v partly_o from_o the_o discovery_n of_o the_o telescope_n and_o microscope_n 41._o and_o partly_o also_o from_o the_o prodigious_o strange_a example_n of_o a_o blind_a man_n that_o can_v feel_v colour_n 42._o who_o history_n be_v relate_v 43_o 44_o 45._o the_o author_n conjecture_n and_o thought_n of_o it_o 46_o 47_o 48_o 49._o and_o several_a conclusion_n and_o corollary_n draw_v from_o it_o about_o the_o nature_n of_o blackness_n and_o black_a body_n 50_o 51_o 52._o and_o about_o the_o asperity_n of_o several_a other_o colour_a body_n 53._o and_o from_o these_o and_o some_o premised_a consideration_n be_v propose_v some_o conjecture_n that_o the_o reason_n of_o the_o several_a phaenomena_n of_o colour_n afterward_o to_o be_v meet_v with_o depend_v upon_o the_o disposition_n of_o the_o see_v part_n of_o the_o object_n 54._o that_o liquor_n may_v alter_v the_o colour_n of_o each_o other_o and_o of_o other_o body_n first_o by_o their_o insinuate_a themselves_o into_o the_o pore_n and_o fill_v they_o whence_o the_o asperity_n of_o the_o surface_n of_o a_o body_n become_v alter_v explicate_v with_o some_o instance_n 55_o 56._o next_o by_o remove_v those_o body_n which_o before_o hinder_v the_o appearance_n of_o the_o genuine_a colour_n confirm_v by_o several_a example_n 57_o three_o by_o make_v a_o fissure_n or_o separation_n either_o in_o the_o contiguous_a or_o continue_a particle_n of_o a_o body_n 58._o four_o by_o a_o union_n or_o conjunction_n of_o the_o former_o separate_a particle_n illustrate_v with_o divers_a instance_n of_o precipitate_v body_n 59_o five_o by_o dislocate_a the_o part_n and_o put_v they_o both_o into_o other_o order_n and_o posture_n which_o be_v illustrate_v with_o instance_n 60_o 61._o six_o by_o motion_n which_o be_v explain_v 62._o and_o last_o and_o chief_o by_o the_o union_n of_o the_o saline_n body_n with_o the_o superficial_a part_n of_o another_o body_n whereby_o both_o their_o bigness_n and_o shape_n must_v necessary_o be_v alter_v 63_o 64._o explain_v by_o experiment_n 65_o 66._o that_o the_o colour_n of_o body_n may_v be_v change_v by_o the_o concurrence_n of_o two_o or_o more_o of_o these_o way_n 67._o and_o beside_o all_o these_o eight_o reflective_a cause_n of_o colour_n there_o may_v be_v in_o transparent_a body_n several_a refractive_a 68_o 69._o why_o the_o author_n think_v the_o nature_n of_o colour_n deserve_v yet_o a_o further_a inquiry_n 69._o first_o for_o that_o the_o little_a mote_n of_o dust_n exhibit_v very_o lovely_a colour_n in_o a_o darken_a room_n whilst_o in_o a_o convenient_a posture_n to_o the_o eye_n which_o in_o other_o posture_n and_o light_n they_o do_v not_o 70._o and_o that_o though_o the_o small_a part_n of_o some_o colour_a body_n be_v transparent_a yet_o of_o other_o they_o be_v not_o so_o that_o the_o first_o doubt_n whether_o the_o superficial_a part_n create_v those_o colour_n and_o the_o second_o whether_o there_o be_v any_o refraction_n at_o all_o in_o the_o late_a 71_o 72_o 73._o a_o famous_a controversy_n among_o philosopher_n about_o the_o nature_n of_o colour_n decide_v 74._o 75._o chap._n 4._o the_o controversy_n state_v about_o real_a and_o emphatical_a colour_n 75_o 76._o that_o the_o great_a disparity_n between_o they_o seem_v to_o be_v partly_o their_o duration_n in_o the_o same_o state_n and_o partly_o that_o genuine_a colour_n be_v produce_v in_o opacous_a body_n by_o reflection_n and_o emphatical_a in_o transparent_a by_o refraction_n 78._o but_o that_o this_o be_v not_o to_o be_v take_v in_o too_o large_a a_o sense_n the_o cautionary_a instance_n of_o froth_n be_v allege_v and_o insist_v on_o 78_o 79._o that_o the_o duration_n be_v not_o a_o sufficient_a characteristick_n exemplify_v by_o the_o duration_n of_o froth_n and_o other_o emphatical_a colour_n and_o the_o sudden_a fade_a of_o flower_n and_o other_o body_n of_o real_a one_o 80._o that_o the_o position_n of_o the_o eye_n be_v not_o necessary_a to_o the_o discern_a emphatical_a colour_n show_v by_o the_o see_v white_a froth_n or_o a_o iris_n cast_v on_o the_o wall_n by_o a_o prism_n in_o what_o place_n of_o the_o room_n soever_o the_o eye_n be_v 81._o which_o proceed_v from_o the_o specular_a reflection_n of_o the_o wall_n 82._o that_o emphatical_a colour_n may_v be_v compound_v and_o that_o the_o present_a discourse_n be_v not_o much_o concern_v whether_o there_o be_v or_o be_v not_o make_v a_o distinction_n between_o real_a and_o emphatical_a colour_n 83._o chap._n 5._o six_o hypothesis_n about_o colour_n recite_v 84_o 85_o why_o the_o author_n can_v more_o full_o speak_v of_o any_o of_o these_o 86._o nor_o acquiesce_v in_o they_o 87_o 88_o what_o pyrophilus_n be_v to_o expect_v in_o this_o treatise_n 88_o 89._o what_o hypothesis_n of_o light_n and_o colour_n the_o author_n most_o incline_v too_o 90._o why_o he_o think_v neither_o that_n nor_o any_o other_o sufficient_a and_o what_o his_o difficulty_n be_v that_o make_v he_o decline_v all_o hypothesis_n and_o to_o think_v it_o very_o difficult_a to_o stick_v to_o any_o 91_o 92._o part_v the_o second_o of_o the_o nature_n of_o whiteness_n and_o blackness_n chap._n i._n the_o reason_n why_o the_o author_n choose_v the_o explication_n of_o whiteness_n and_o blackness_n 93._o wherein_o democritus_n think_v amiss_o of_o these_o 94._o gassendus_fw-la his_o opinion_n about_o they_o 95._o what_o the_o author_n approve_v and_o a_o more_o full_a explication_n of_o white_a make_v it_o a_o multiplicity_n of_o light_n or_o reflection_n 96_o 97._o confirm_a first_o by_o the_o whiteness_n of_o the_o meridian_n sun_n observe_v in_o water_n 98._o and_o of_o a_o piece_n of_o iron_n glow_v hot_a 99_o second_o by_o the_o offensiveness_n of_o snow_n to_o the_o traveller_n eye_n confirm_v by_o a_o example_n of_o a_o person_n that_o have_v travel_v much_o in_o russia_n 100_o and_o by_o a_o observation_n out_o of_o olaus_n magnus_n 100_o and_o that_o the_o snow_n do_v enlighten_v and_o clear_v the_o air_n in_o the_o night_n confirm_v by_o the_o moscow_n physician_n and_o captain_n james_n 101._o but_o that_o snow_n have_v no_o inherent_a light_n prove_v by_o experience_n 102._o three_o by_o the_o great_a store_n of_o reflection_n from_o white_a body_n observe_v in_o a_o darken_a room_n and_o by_o their_o unaptness_n to_o be_v kindle_v by_o a_o burning-glass_n 103._o four_o the_o specularness_n of_o white_a body_n be_v confirm_v by_o the_o reflection_n in_o a_o dark_a room_n from_o other_o body_n 104._o and_o by_o the_o appearance_n of_o a_o river_n which_o both_o to_o the_o eye_n and_o in_o a_o darken_a room_n appear_v white_a 105._o 106._o five_o by_o the_o whiteness_n of_o distil_a mercury_n and_o that_o of_o the_o galaxy_n 107_o 108._o and_o by_o the_o whiteness_n of_o froth_n raise_v from_o white_n of_o egg_n beat_v that_o this_o whiteness_n come_v not_o from_o the_o air_n show_v by_o experiment_n 109._o 110._o where_o occasional_o the_o whiteness_n of_o distil_v oil_n hot_a water_n etc._n etc._n be_v show_v 111._o that_o it_o seem_v not_o necessary_a the_o reflect_v surface_n shall_v be_v spherical_a confirm_v by_o experiment_n 112_o 113._o six_o by_o the_o whiteness_n of_o the_o powder_n of_o transparent_a body_n 114._o seven_o by_o the_o experiment_n of_o whiten_v and_o burnish_v silver_n 115._o 116._o chap._n 2._o a_o recital_n of_o some_o opinion_n about_o blackness_n and_o which_o the_o author_n incline_v to_o 117._o which_o he_o further_o insist_o on_o and_o explicate_v 118_o 119._o and_o show_v for_o what_o reason_n he_o embrace_v that_o
will_v not_o appear_v diaphanous_a for_o have_v consider_v mercury_n precipitate_v pierce_v the_o little_a granule_n that_o make_v up_o the_o powder_n look_v like_o little_a fragment_n of_o coral_n behold_v by_o the_o naked_a eye_n at_o a_o distance_n for_o very_o near_o at_o hand_n coral_n will_v sometime_o especial_o if_o it_o be_v good_a show_v some_o transparency_n file_n likewise_o of_o steel_n and_o copper_n though_o in_o a_o excellent_a microscope_n and_o a_o fair_a day_n they_o show_v like_o pretty_a big_a fragment_n of_o those_o metal_n and_o have_v considerable_a brightness_n on_o some_o of_o their_o surface_n yet_o i_o be_v not_o satisfy_v that_o i_o perceive_v any_o reflection_n from_o the_o inner_a part_n of_o any_o of_o the_o file_n nay_o have_v look_v in_o my_o best_a microscope_n upon_o the_o red_a calx_fw-la of_o lead_n common_o call_v minium_n neither_o i_o nor_o any_o i_o show_v it_o to_o can_v discern_v it_o to_o be_v other_o than_o opacous_a though_o the_o day_n be_v clear_a and_o the_o object_n strong_o enlighten_v and_o the_o deep_o red_a colour_n of_o vitriol_n appear_v in_o the_o same_o microscope_n notwithstanding_o the_o great_a comminution_n effect_v by_o the_o fire_n but_o like_o grossy_z beat_a brick_n so_o that_o pyrophilus_n i_o shall_v willing_o resign_v you_o the_o care_n of_o make_v some_o further_a inquiry_n into_o the_o subject_a we_o have_v now_o be_v consider_v for_o i_o confess_v as_o i_o tell_v you_o before_o that_o i_o think_v that_o the_o matter_n may_v need_v a_o further_a scrutiny_n nor_o will_v i_o be_v forward_o to_o determine_v how_o far_o or_o in_o what_o case_n the_o transparency_n or_o semi-diaphaniety_a of_o the_o superficial_a corpuscle_n of_o big_a body_n may_v have_v a_o interest_n in_o the_o production_n of_o their_o colour_n especial_o because_o that_o even_o in_o divers_a white_a body_n as_o beat_v glass_n snow_n and_o froth_n where_o it_o seem_v manifest_a that_o the_o superficial_a part_n be_v single_o diaphanous_a be_v either_o water_n or_o air_n or_o glass_n we_o see_v not_o that_o such_o variety_n of_o colour_n be_v produce_v as_o usual_o be_v by_o the_o refraction_n of_o light_n even_o in_o those_o body_n when_o by_o their_o bigness_n shape_n etc._n etc._n they_o be_v convenient_o qualify_v to_o exhibit_v such_o various_a and_o lively_a colour_n as_o those_o of_o the_o rainbow_n and_o of_o prismatical_a glass_n 28._o by_o what_o have_v be_v hitherto_o discourse_v pyrophilus_n we_o may_v be_v assist_v to_o judge_v of_o that_o famous_a controversy_n which_o be_v of_o old_a dispute_v betwixt_o the_o epicurean_o and_o other_o atomist_n on_o the_o one_o side_n and_o most_o other_o philosopher_n on_o the_o other_o side_n the_o former_a deny_v body_n to_o be_v colour_a in_o the_o dark_a and_o the_o latter_a make_v colour_n to_o be_v a_o inherent_a quality_n as_o well_o as_o figure_n hardness_n weight_n or_o the_o like_a for_o though_o this_o controversy_n be_v revive_v and_o hot_o agitate_a among_o the_o modern_n yet_o i_o doubt_v whether_o it_o be_v not_o in_o great_a part_n a_o nominal_a dispute_n and_o therefore_o let_v we_o according_a to_o the_o doctrine_n former_o deliver_v distinguish_v the_o acception_n of_o the_o word_n colour_n and_o say_v that_o if_o it_o be_v take_v in_o the_o strict_a sense_n the_o epicurean_o seem_v to_o be_v in_o the_o right_n for_o if_o colour_n be_v indeed_o though_o not_o according_a to_o they_o but_o light_v modify_v how_o can_v we_o conceive_v that_o it_o can_v subsist_v in_o the_o dark_a that_o be_v where_o it_o must_v be_v suppose_v there_o be_v no_o light_n but_o on_o the_o other_o side_n if_o colour_n be_v consider_v as_o a_o certain_a constant_a disposition_n of_o the_o superficial_a part_n of_o the_o object_n to_o trouble_v the_o light_n they_o reflect_v after_o such_o and_o such_o a_o determinate_a manner_n this_o constant_a and_o if_o i_o may_v so_o speak_v modify_v disposition_n persevere_v in_o the_o object_n whether_o it_o be_v shine_v upon_o or_o no_o there_o seem_v no_o just_a reason_n to_o deny_v but_o that_o in_o this_o sense_n body_n retain_v their_o colour_n as_o well_o in_o the_o night_n as_o day_n or_o to_o speak_v a_o little_a otherwise_o it_o may_v be_v say_v that_o body_n be_v potential_o colour_a in_o the_o dark_a and_o actual_o in_o the_o light_n but_o of_o this_o matter_n discourse_v more_o full_o elsewhere_o as_o it_o be_v a_o difficulty_n that_o concern_v quality_n in_o general_a i_o shall_v forbear_v to_o insist_v on_o it_o here_o chap._n iu._n 1._o of_o great_a moment_n in_o the_o investigation_n of_o the_o nature_n of_o colour_n be_v the_o controversy_n whether_o those_o of_o the_o rainbow_n and_o those_o that_o be_v often_o see_v in_o cloud_n before_o the_o rise_n or_o after_o the_o set_v of_o the_o sun_n and_o in_o a_o word_n whether_o those_o other_o colour_n that_o be_v wont_a to_o be_v call_v emphatical_a ought_v or_o ought_v not_o to_o be_v account_v true_a colour_n i_o need_v not_o tell_v you_o that_o the_o negative_a be_v the_o common_a opinion_n especial_o in_o the_o school_n as_o may_v appear_v by_o that_o vulgar_a distinction_n of_o colour_n whereby_o these_o under_o consideration_n be_v term_v apparent_a by_o way_n of_o opposition_n to_o those_o that_o in_o the_o other_o member_n of_o the_o distinction_n be_v call_v true_a or_o genuine_a this_o question_n i_o say_v seem_v to_o i_o of_o importance_n upon_o this_o account_n that_o it_o be_v common_o grant_v or_o however_o easy_a enough_o to_o be_v prove_v that_o emphatical_a colour_n be_v light_v itself_o modify_v by_o refraction_n chief_o with_o a_o concurrence_n sometime_o of_o reflection_n and_o perhaps_o some_o other_o accident_n depend_v on_o these_o two_o if_o these_o emphatical_a colour_n be_v resolve_v to_o be_v genuine_a it_o will_v seem_v consequent_a that_o colour_n or_o at_o least_o divers_a of_o they_o be_v but_o diversify_v light_n and_o not_o such_o real_a and_o inherent_a quality_n as_o they_o be_v common_o think_v to_o be_v 2._o now_o since_o we_o be_v wont_n to_o esteem_v the_o echo_n and_o other_o sound_v of_o body_n to_o be_v true_a sound_n all_o their_o odour_n to_o be_v true_a odour_n and_o to_o be_v short_a since_o we_o judge_v other_o sensible_a quality_n to_o be_v true_a one_o because_o they_o be_v the_o proper_a object_n of_o some_o or_o other_o of_o our_o sense_n i_o see_v not_o why_o emphatical_a colour_n be_v the_o proper_a and_o peculiar_a object_n of_o the_o organ_n of_o sight_n and_o capable_a to_o affect_v it_o as_o true_o and_o as_o powerful_o as_o other_o colour_n shall_v be_v repute_v but_o imaginary_a one_o and_o if_o we_o have_v which_o perchance_o you_o will_v allow_v former_o evince_v colour_n when_o the_o word_n be_v take_v in_o its_o more_o proper_a sense_n to_o be_v but_o modify_v light_n there_o will_v be_v small_a reason_n to_o deny_v these_o to_o be_v true_a colour_n which_o more_o manifest_o than_o other_o disclose_v themselves_o to_o be_v produce_v by_o diversification_n of_o the_o light_n 3._o there_o be_v indeed_o take_v notice_n of_o a_o difference_n betwixt_o these_o apparent_a colour_n and_o those_o that_o be_v wont_a to_o be_v esteem_v genuine_a as_o to_o the_o duration_n which_o have_v induce_v some_o learned_a man_n to_o call_v the_o former_a rather_o evanid_a than_o fantastical_a but_o as_o the_o ingenious_a gassendus_fw-la do_v somewhere_o judicious_o observe_v if_o this_o way_n of_o argue_v be_v good_a the_o greeness_n of_o a_o leaf_n ought_v to_o pass_v for_o apparent_a because_o soon_o fade_v into_o a_o yellow_a it_o scarce_o last_v at_o all_o in_o comparison_n of_o the_o greeness_n of_o a_o emerald_n i_o shall_v add_v that_o if_o the_o sunbeam_n be_v in_o a_o convenient_a manner_n traject_v through_o a_o glass-prism_a and_o throw_v upon_o some_o well-shaded_n object_n within_o a_o room_n the_o rainbow_n thereby_o paint_v on_o the_o surface_n of_o the_o body_n that_o terminate_v the_o beam_n may_v oftentimes_o last_v long_o than_o some_o colour_n i_o have_v produce_v in_o certain_a body_n which_o will_v just_o and_o without_o scruple_n be_v account_v genuine_a colour_n and_o yet_o sudden_o degenerate_a and_o lose_v their_o nature_n 4._o a_o great_a disparity_n betwixt_o emphatical_a colour_n and_o other_o may_v perhaps_o be_v take_v from_o this_o that_o genuine_a colour_n seem_v to_o be_v produce_v in_o opacous_a body_n by_o reflection_n but_o apparent_a one_o in_o diaphanous_a body_n and_o principal_o by_o refraction_n i_o say_v principal_o rather_o than_o solely_n because_o in_o some_o case_n reflection_n also_o may_v concur_v but_o still_o this_o seem_v not_o to_o conclude_v these_o latter_a colour_n not_o to_o be_v true_a one_o nor_o must_v what_o have_v be_v new_o say_v of_o the_o difference_n of_o true_a and_o apparent_a colour_n be_v interpret_v in_o too_o unlimited_a a_o sense_n and_o
as_o far_o as_o i_o can_v judge_v by_o what_o i_o have_v try_v be_v able_a to_o make_v it_o a_o yellow_a liquor_n insomuch_o that_o a_o single_a drop_n of_o a_o rich_a solution_n of_o cochineel_n in_o spirit_n of_o urine_n be_v dilute_v with_o above_o a_o ounce_n of_o fair_a water_n exhibit_v no_o yellowishness_n at_o all_o but_o a_o fair_a though_o somewhat_o faint_a pink_n or_o carnation_n and_o even_o when_o cochineel_n be_v by_o degree_n dilute_v much_o beyond_o the_o new_o mention_v colour_n by_o the_o way_n former_o relate_v to_o you_o in_o the_o twenty_o four_o experiment_n i_o remember_v not_o that_o there_o appear_v in_o the_o whole_a trial_n any_o yellow_a but_o if_o you_o take_v balsom_a of_o sulphur_n for_o instance_n though_o it_o may_v appear_v in_o a_o glass_n where_o it_o have_v a_o good_a thickness_n to_o be_v of_o a_o deep_a red_a yet_o if_o you_o shake_v the_o glass_n or_o pour_v a_o few_o drop_n on_o a_o sheet_n of_o white_a paper_n spread_v they_o on_o it_o with_o your_o finger_n the_o balsam_n that_o fall_v back_o along_o the_o side_n of_o the_o glass_n and_o that_o which_o stain_v the_o paper_n will_v appear_v yellow_a not_o red._n and_o there_o be_v divers_a tincture_n such_o as_o that_o of_o amber_n make_v with_o spirit_n of_o wine_n to_o name_n now_o no_o more_o that_o will_v appear_v either_o yellow_a or_o red_a according_a as_o the_o vessel_n that_o they_o fill_v be_v slender_n or_o broad_n experiment_n xxxiii_o but_o to_o proceed_v to_o the_o experiment_n i_o be_v about_o to_o deliver_v first_o oil_n or_o spirit_n of_o turpentine_n though_o clear_a as_o fair_a water_n be_v digest_v upon_o the_o pure_o white_a sugar_n of_o lead_n have_v in_o a_o short_a time_n afford_v we_o a_o high_a red_a tincture_n that_o some_o artist_n be_v please_v to_o call_v the_o balsam_n of_o saturn_n which_o they_o very_o much_o and_o probable_o not_o altogether_o without_o cause_n extol_v as_o a_o excellent_a medicine_n in_o divers_a outward_a affection_n experiment_n xxxiv_o next_o take_v of_o common_a brimstone_n fine_o powder_v five_o ounce_n of_o salarmoniack_a likewise_o pulverise_v a_o equal_a weight_n of_o beat_a quicklime_n six_o ounce_n mix_v these_o powder_n exquisite_o and_o distil_v they_o through_o a_o retort_n place_v in_o sand_n by_o degree_n of_o fire_n give_v at_o length_n as_o intense_a a_o heat_n as_o you_o well_o can_v in_o sand_n there_o will_v come_v over_o if_o you_o have_v wrought_v well_o a_o volatile_a tincture_n of_o sulphur_n which_o may_v probable_o prove_v a_o excellent_a medicine_n and_o shall_v have_v be_v mention_v among_o the_o other_o preparation_n of_o sulphur_n which_o we_o have_v elsewhere_o impart_v to_o you_o but_o that_o it_o be_v very_o pertinent_a to_o our_o present_a subject_n the_o change_n of_o colour_n for_o though_o none_o of_o the_o ingredient_n be_v red_a the_o distil_v liquor_n will_v be_v so_o and_o this_o liquor_n if_o it_o be_v well_o draw_v will_v upon_o a_o little_a agitation_n of_o the_o vial_n first_o unstopped_a especial_o if_o it_o be_v hold_v in_o a_o warm_a hand_n send_v forth_o a_o copious_a fume_v not_o red_a like_o that_o of_o nitre_n but_o white_a and_o sometime_o this_o liquor_n may_v be_v so_o draw_v that_o i_o remember_v not_o long_o since_o i_o take_v pleasure_n to_o observe_v in_o a_o parcel_n of_o it_o that_o ingredient_n not_o red_a do_v not_o only_o yield_v by_o distillation_n a_o volatile_a spirit_n that_o be_v red_a but_o though_o that_o liquor_n do_v upon_o the_o bare_a open_n of_o the_o bottle_n it_o be_v keep_v in_o drive_v we_o away_o with_o the_o plenty_n and_o sulphureous_a send_v of_o a_o white_a steam_n which_o it_o send_v forth_o yet_o the_o liquor_n itself_o be_v touch_v by_o our_o finger_n do_v immediate_o die_v they_o black_n experiment_n xxxv_o the_o three_o and_o last_o experiment_n i_o shall_v now_o mention_v to_o show_v how_o prone_a body_n abound_v in_o sulphureous_a part_n be_v to_o afford_v a_o red_a colour_n be_v one_o wherein_o by_o the_o operation_n of_o a_o saline_n spirit_n upon_o a_o white_a or_o whitish_a body_n which_o according_a to_o the_o chemist_n shall_v be_v altogether_o sulphureous_a a_o redness_n may_v be_v produce_v not_o as_o in_o the_o former_a experiment_n slow_o but_o in_o the_o twinkle_n of_o a_o eye_n we_o take_v then_o of_o the_o essential_a oil_n of_o anniseed_n which_o have_v this_o peculiarity_n that_o in_o cold_a weather_n it_o lose_v its_o fluidity_n and_o the_o great_a part_n of_o its_o transparency_n and_o look_n like_o a_o white_a or_o whitish_a ointment_n and_o near_o at_o hand_n seem_v to_o consist_v of_o a_o multitude_n of_o little_a soft_a scale_n of_o this_o coagulate_v stuff_v we_o spread_v a_o little_a with_o a_o knife_n upon_o a_o piece_n of_o white_a paper_n and_o let_v fall_n on_o it_o and_o mix_v with_o it_o a_o drop_n or_o two_o of_o oil_n of_o vitriol_n immediate_o as_o we_o foresee_v there_o emerge_v together_o with_o some_o heat_n and_o smoke_n a_o blood-red_n colour_n which_o therefore_o be_v in_o a_o trice_n produce_v by_o two_o body_n whereof_o the_o one_o have_v but_o a_o whitish_a colour_n and_o the_o other_o if_o careful_o rectify_v have_v no_o colour_n at_o all_o experiment_n xxxvi_o but_o on_o this_o occasion_n pyrophilus_n we_o must_v add_v once_o for_o all_o that_o in_o many_o of_o the_o above-recited_n experiment_n though_o the_o change_n of_o colour_n happen_v as_o we_o have_v mention_v they_o yet_o the_o emergent_a or_o produce_v colour_n be_v oft_o time_n very_a subject_n to_o degenerate_a both_o quick_o and_o much_o notwithstanding_o which_o since_o the_o change_n we_o have_v set_v down_o do_v happen_v present_o upon_o the_o operation_n of_o the_o body_n upon_o each_o other_o or_o at_o the_o time_n by_o we_o specify_v that_o be_v sufficient_a both_o to_o justify_v our_o veracity_n and_o to_o show_v what_o we_o intend_v it_o not_o be_v essential_a to_o the_o genuineness_n of_o a_o colour_n to_o be_v durable_a for_o a_o fade_a leaf_n that_o be_v ready_a to_o rot_v and_o moulder_v into_o dust_n may_v have_v as_o true_a a_o yellow_a as_o a_o wedge_n of_o gold_n which_o so_o obstinate_o resist_v both_o time_n and_o fire_n and_o the_o reason_n why_o i_o take_v occasion_n from_o the_o former_a experiment_n to_o subjoin_v this_o general_a advertisement_n be_v that_o i_o have_v several_a time_n observe_v that_o the_o mixture_n result_v from_o the_o oil_n of_o vitriol_n and_o of_o anniseed_n though_o it_o acquire_v a_o thick_a consistence_n than_o either_o of_o the_o ingredient_n have_v have_v quick_o lose_v its_o colour_n turn_v in_o a_o very_a short_a time_n into_o a_o dirty_a grace_n at_o least_o in_o the_o superficial_a part_n where_o it_o be_v expose_v to_o the_o air_n which_o last_o circumstance_n i_o therefore_o mention_n because_o that_o though_o it_o seem_v probable_a that_o this_o degeneration_n of_o colour_n may_v oft_o time_n and_o in_o divers_a case_n proceed_v from_o the_o further_a action_n of_o the_o saline_n corpuscle_n and_o the_o other_o ingredient_n upon_o one_o another_o yet_o in_o many_o case_n much_o of_o the_o quick_a change_n of_o colour_n seem_v ascribeable_a to_o the_o air_n as_o may_v be_v make_v probable_a by_o several_a reason_n the_o first_o whereof_o may_v be_v fetch_v from_o the_o new_o recite_v example_n of_o the_o two_o oil_n the_o next_o may_v be_v that_o we_o have_v sometime_o observe_v long_a window-curtain_n of_o light_a colour_n to_o have_v that_o part_n of_o they_o which_o be_v expose_v to_o the_o air_n when_o the_o window_n be_v open_a of_o one_o colour_n and_o the_o low_a part_n that_o be_v shelter_v from_o the_o air_n by_o the_o wall_n of_o another_o colour_n and_o the_o three_o argument_n may_v be_v fetch_v from_o divers_a observation_n both_o of_o other_o and_o our_o own_o for_o of_o that_o pigment_n so_o well_o know_v in_o painter_n shop_n by_o the_o name_n of_o turnso_n our_o industrious_a parkinson_n in_o the_o particular_a account_n he_o give_v of_o the_o plant_n that_o bear_v it_o tell_v we_o also_o that_o the_o berry_n when_o they_o be_v at_o their_o full_a maturity_n have_v within_o they_o between_o the_o outer_a skin_n and_o the_o inward_a 12._o kernel_n or_o seed_n a_o certain_a juice_n or_o moisture_n which_o be_v rub_v upon_o paper_n or_o cloth_n at_o the_o first_o appear_v of_o a_o fresh_a and_o lovely_a green_a colour_n but_o present_o change_v into_o a_o kind_n of_o bluish_a purple_n upon_o the_o cloth_n or_o paper_n and_o the_o same_o cloth_n afterward_o wet_a in_o water_n and_o wring_v forth_o will_v colour_n the_o water_n into_o a_o claret_n wine_n colour_n and_o these_o conclude_v he_o be_v those_o rag_n of_o cloth_n which_o be_v usual_o call_v turnsol_n in_o the_o druggist_n or_o grocer_n shop_n and_o to_o this_o observation_n of_o our_o botanist_n we_o
corpuseles_o as_o be_v before_o single_o inconspicuous_a they_o will_v become_v inconspicuous_a again_o and_o consequent_o leave_v the_o liquor_n as_o colourless_a as_o before_o the_o precipitation_n be_v make_v this_o as_o i_o say_v pyrophilus_n seem_v to_o be_v the_o chemical_a reason_n of_o this_o experiment_n that_o be_v such_o a_o reason_n as_o suppose_v the_o truth_n of_o those_o chemical_a notion_n i_o have_v elsewhere_o i_o hope_v evince_v may_v give_v such_o a_o account_n of_o the_o phaenomena_n as_o chemical_a notion_n can_v supply_v we_o with_o but_o i_o both_o here_o and_o elsewhere_o make_v use_n of_o this_o way_n of_o speak_v to_o intimate_v that_o i_o be_o sufficient_o aware_a of_o the_o difference_n betwixt_o a_o chemical_a explication_n of_o a_o phaenomenon_n and_o one_o that_o be_v true_o philosophical_a or_o mechanical_a as_o in_o our_o present_a case_n i_o tell_v you_o something_o when_o i_o tell_v you_o that_o the_o yellowness_n of_o the_o mercurial_a solution_n and_o the_o oil_n of_o tartar_n be_v produce_v by_o the_o precipitation_n occasion_v by_o the_o affusion_n of_o the_o latter_a of_o those_o liquor_n and_o that_o the_o destruction_n of_o the_o colour_n proceed_v from_o the_o dissipation_n of_o that_o curdled_a matter_n who_o texture_n be_v destroy_v and_o which_o be_v dissolve_v into_o minute_n and_o invisible_a particle_n by_o the_o potent_o acid_n menstruum_fw-la which_o be_v the_o reason_n why_o there_o remain_v no_o sediment_n in_o the_o bottom_n because_o the_o infuse_a oil_n take_v it_o up_o and_o resolve_v it_o into_o hide_a or_o invisible_a part_n as_o water_n do_v salt_n or_o sugar_n but_o when_o i_o have_v tell_v you_o all_o this_o i_o be_o far_o from_o think_v i_o have_v tell_v all_o that_o such_o a_o inquisitive_a person_n as_o yourself_o will_v know_v for_o i_o presume_v you_o will_v desire_v as_o well_o as_o i_o to_o learn_v at_o least_o why_o the_o particle_n of_o the_o mercury_n of_o the_o tartar_n and_o of_o the_o acid_n salt_n convening_n together_o shall_v make_v rather_o a_o orange_a colour_n than_o a_o red_a or_o a_o blue_n or_o a_o green_a for_o it_o be_v not_o enough_o to_o say_v what_o i_o relate_v a_o little_a before_o that_o divers_a mercurial_a solution_n though_o otherwise_o make_v will_v yield_v a_o yellow_a precipitate_a because_o the_o question_n will_v recur_v concern_v they_o and_o to_o give_v it_o a_o satisfactory_a answer_n be_v i_o free_o acknowledge_v more_o than_o i_o dare_v as_o yet_o pretend_v to_o but_o to_o confirm_v my_o conjecture_n about_o the_o chemical_a reason_n of_o our_o experiment_n i_o may_v add_v that_o as_o i_o have_v viz._n pag._n 34_o of_o this_o treatise_n elsewhere_o on_o another_o occasion_n tell_v you_o with_o saline_n liquor_n of_o another_o kind_n and_o nature_n than_o salt_n of_o tartar_n namely_o with_o spirit_n of_o urine_n and_o liquor_n of_o kin_n to_o that_o i_o can_v make_v the_o mercury_n precipitate_v out_o of_o the_o first_o simple_a solution_n quite_o of_o another_o colour_n than_o that_o hitherto_o mention_v nay_o if_o instead_o of_o alter_v the_o precipitate_v liquor_n i_o alter_v the_o texture_n of_o the_o sublimate_n in_o such_o a_o way_n as_o my_o notion_n about_o salt_n require_v i_o can_v produce_v the_o same_o phaenomenon_n for_o have_v purposely_o sublimed_a together_o equal_a part_n or_o thereabouts_o of_o salarmoniack_a and_o sublimate_n first_o diligent_o mix_v the_o ascend_a flower_n be_v dissolve_v in_o fair_a water_n and_o filter_v give_v a_o solution_n limpid_n and_o colourless_a like_o that_o of_o the_o other_o sublimate_n and_o yet_o a_o alcaly_a drop_v into_o this_o liquor_n do_v not_o turn_v it_o yellow_a but_o white_a and_o upon_o the_o same_o ground_n we_o may_v with_o quicksilver_n without_o the_o help_n of_o common_a sublimate_n prepare_v another_o sort_n of_o flower_n dissoluble_a in_o water_n without_o discolour_v it_o with_o which_o i_o can_v likewise_o do_v what_o i_o new_o mention_v to_o which_o i_o shall_v add_v what_o possible_o you_o will_v somewhat_o wonder_v at_o that_o so_o much_o do_v the_o colour_n depend_v upon_o the_o texture_n result_v from_o the_o convention_n of_o the_o several_a sort_n of_o corpuseles_a that_o though_o in_o our_o experiment_n oil_n of_o vitriol_n destroy_v the_o yellow_a colour_n yet_o with_o quicksilver_n and_o fair_a water_n by_o the_o help_n of_o oil_n of_o vitriol_n alone_o we_o may_v easy_o make_v a_o kind_n of_o precipitate_v of_o a_o fair_a and_o permanent_a yellow_n as_o you_o will_v ever_o long_o in_o the_o forty_o second_o expement_n of_o this_o three_o part_n be_v teach_v and_o i_o may_v further_o add_v that_o i_o choose_v oil_n of_o vitriol_n not_o so_o much_o for_o any_o other_o or_o peculiar_a quality_n as_o for_o its_o be_v when_o it_o be_v well_o rectify_v which_o it_o be_v somewhat_o hazardous_a to_o bring_v it_o to_o be_v not_o only_o devoid_a of_o colour_n and_o in_o smell_v but_o extreme_o strong_a and_o incisive_n for_o though_o common_a and_o undephlegmated_a aquafortis_n will_v not_o perform_v the_o same_o thing_n well_o yet_o that_o which_o be_v make_v exceed_v strong_a by_o be_v careful_o dephlegm_v will_v do_v it_o pretty_a well_o though_o not_o so_o well_o as_o oil_n of_o vitriol_n which_o be_v so_o strong_a that_o even_o without_o rectification_n it_o may_v for_o a_o need_n be_v make_v use_n of_o i_o will_v not_o here_o tell_v you_o what_o i_o have_v try_v that_o i_o may_v be_v able_a to_o deprive_v at_o pleasure_n the_o precipitate_v that_o one_o of_o the_o sulphureous_a liquor_n have_v make_v by_o the_o copious_a affusion_n of_o the_o other_o because_o i_o find_v though_o this_o experiment_n be_v too_o ticklish_a to_o let_v i_o give_v a_o full_a account_n of_o it_o in_o few_o word_n i_o shall_v therefore_o tell_v you_o that_o it_o be_v not_o only_o for_o once_o that_o the_o other_o abovementioned_a experiment_n may_v be_v make_v the_o same_o numerical_a parcel_n of_o liquor_n be_v still_o employ_v in_o it_o for_o after_o i_o have_v clarify_v the_o orange_a colour_a liquor_n by_o the_o addition_n of_o as_o little_a of_o the_o oil_n of_o viriol_n as_o will_v suffice_v to_o perform_v the_o effect_n i_o can_v again_o at_o pleasure_n re-produce_a the_o opacous_a colour_n by_o the_o drop_n in_o of_o fresh_a oil_n of_o tartar_n and_o destroy_v it_o again_o by_o the_o reaffusion_a of_o more_o of_o the_o acid_n menstruum_fw-la and_o yet_o often_o if_o i_o please_v can_v i_o with_o these_o two_o contrariant_n liquor_n recall_v and_o disperse_v the_o colour_n though_o by_o reason_n of_o the_o addition_n of_o so_o much_o new_a liquor_n in_o reference_n to_o the_o mercurial_a particle_n the_o colour_n will_v at_o length_n appear_v more_o dilute_a and_o faint_a a_o improvement_n of_o the_o forty_o experiment_n and_o pyrophilus_n to_o confirm_v yet_o further_o the_o notion_n that_o lead_v i_o to_o think_v on_o the_o propose_a experiment_n i_o shall_v acquaint_v you_o with_o another_o which_o when_o i_o have_v conveniency_n i_o have_v sometime_o add_v to_o it_o and_o which_o have_v to_o the_o spectator_n appear_v little_o less_o odd_a than_o the_o first_o and_o though_o because_o the_o liquor_n requisite_a to_o make_v the_o trial_n succeed_v well_o must_v be_v on_o purpose_n prepare_v anew_o a_o while_n before_o because_o it_o will_v not_o long_o retain_v its_o fitness_n for_o this_o work_n i_o do_v but_o seldom_o annex_v this_o experiment_n to_o the_o other_o yet_o i_o shall_v tell_v you_o how_o i_o devise_v it_o and_o how_o i_o make_v it_o if_o you_o boil_v crude_a antimony_n in_o a_o strong_a and_o clear_a lixivium_n you_o shall_v separate_v a_o substance_n from_o it_o which_o some_o modern_a chemist_n be_v please_v to_o call_v its_o sulphur_n but_o how_o deserve_o i_o shall_v not_o here_o examine_v have_v elsewhere_o do_v it_o in_o a_o opportune_a place_n wherefore_o i_o shall_v now_o but_o need_n to_o take_v notice_n that_o when_o this_o 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