a_o blue_a liquor_n which_o not_o a_o few_o ingenious_a person_n and_o among_o they_o some_z who_o profession_n make_v they_o very_o conversant_a with_o colour_n have_v look_v upon_o with_o some_o wonder_n but_o these_o azure_a colour_a liquor_n shall_v be_v free_v from_o the_o subside_v matter_n which_o the_o salt_n of_o tartar_n or_o urine_n precipitate_v out_o of_o they_o rather_o by_o be_v decant_v than_o by_o filtration_n for_o by_o the_o latter_a of_o these_o way_n we_o have_v sometime_o find_v the_o colour_n of_o they_o very_o much_o impair_v and_o little_a superior_a to_o that_o of_o the_o grosser_n substance_n that_o it_o leave_v in_o the_o filtre_n experiment_n xxiii_o that_o rose_n hold_v over_o the_o fume_v of_o sulphur_n may_v quick_o by_o it_o be_v deprive_v of_o their_o colour_n and_o have_v as_o much_o of_o their_o leave_n as_o the_o fume_v work_n upon_o burn_v pale_a be_v a_o experiment_n that_o divers_a other_o have_v try_v as_o well_o as_o i._o but_o pyrophilus_n 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much_o far_o than_o perhaps_o you_o yet_o imagine_v and_o may_v be_v of_o good_a use_n to_o those_o who_o it_o concern_v to_o know_v how_o die_a stuff_n may_v be_v wrought_v upon_o by_o saline_n liquor_n for_o i_o have_v find_v this_o experiment_n to_o succeed_v in_o so_o many_o various_a berry_n flower_n blossom_n and_o other_o fine_a part_n of_o vegetable_n that_o neither_o my_o memory_n nor_o my_o leisure_n serve_v i_o to_o enumerate_v they_o and_o it_o be_v somewhat_o surprise_v to_o see_v by_o how_o differingly-coloured_a flower_n or_o blossom_n for_o example_n the_o paper_n be_v stain_v will_v by_o a_o acid_n spirit_n be_v immediate_o turn_v red_a and_o by_o any_o alcaly_a or_o any_o urinous_a spirit_n turn_v green_a insomuch_o that_o even_o the_o crush_a blossom_n of_o meserion_n which_o i_o gather_v in_o winter_n and_o frosty_a wether_n and_o those_o of_o pease_n crush_v upon_o white_a paper_n how_o remote_a soever_o their_o colour_n be_v from_o green_n will_v in_o a_o moment_n 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endeavour_n to_o show_v both_o by_o the_o make_n of_o specular_a body_n white_a and_o the_o make_n of_o a_o white_a body_n specular_a 10._o in_o the_o five_o place_n then_o i_o will_v inform_v you_o that_o not_o to_o repeat_v what_o gassendus_fw-la observe_v concern_v water_n i_o have_v for_o curiosity_n sake_n distil_v quicksilver_n in_o a_o cucurbit_n fit_v with_o a_o capacious_a glass-head_n and_o observe_v that_o when_o the_o operation_n be_v perform_v by_o the_o degree_n of_o fire_n requisite_a for_o my_o purpose_n there_o will_v stick_v to_o the_o inside_n of_o the_o alembick_a a_o multitude_n of_o little_a round_a drop_n of_o mercury_n and_o as_o you_o know_v that_o mercury_n be_v a_o specular_a body_n so_o each_o of_o these_o little_a drop_n be_v a_o small_a round_a looking-glass_n and_o a_o multitude_n of_o they_o lie_v thick_a and_o near_o one_o another_o they_o do_v both_o in_o my_o judgement_n and_o that_o of_o those_o i_o invite_v to_o see_v it_o make_v the_o glass_n 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experiment_n i_o take_v a_o quantity_n fair_a water_n &_o put_v to_o it_o in_o a_o clear_a glass_n phial_a a_o convenient_a quantity_n of_o oil_n or_o spirit_n of_o turpentine_n because_o that_o liquor_n will_v not_o incorporate_v with_o water_n and_o yet_o be_v almost_o as_o clear_a and_o colourless_a as_o it_o these_o be_v gentle_o shake_v together_o the_o agitation_n break_v the_o oil_n which_o as_o i_o say_v be_v indisposed_a to_o mix_v like_o wine_n or_o milk_n per_fw-la minima_fw-la with_o the_o water_n into_o a_o multitude_n of_o little_a globe_n which_o each_o of_o they_o reflect_v outward_o a_o lucid_a image_n make_v the_o imperfect_a mixture_n of_o the_o two_o liquor_n appear_v whitish_a but_o if_o by_o vehement_o shake_v the_o glass_n for_o a_o competent_a time_n you_o make_v a_o further_a comminution_n of_o the_o oil_n into_o far_o more_o numerous_a and_o smaller_n globuli_fw-la and_o thereby_o confound_v it_o also_o better_a with_o the_o water_n the_o mixture_n will_v appear_v of_o a_o much_o great_a whiteness_n and_o almost_o like_a milk_n whereas_o if_o the_o glass_n be_v a_o while_n let_v alone_o the_o colour_n will_v by_o degree_n impair_v as_o the_o oily_a globe_n grow_v few_o and_o bigger_n and_o at_o length_n will_v quite_o vanish_v leave_v both_o the_o liquor_n distinct_a and_o diaphanous_a as_o before_o and_o such_o a_o trial_n have_v not_o ill_o succeed_v when_o instead_o of_o the_o colourless_a oil_n of_o turpentine_n i_o take_v a_o yellow_a mixture_n make_v of_o a_o good_a proportion_n of_o crude_a turpentine_n dissolve_v in_o that_o liquor_n and_o if_o i_o mis-rememb_a not_o it_o also_o succeed_v better_a than_o one_o will_v expect_v when_o i_o employ_v a_o oil_n bring_v by_o file_n of_o copper_n infuse_v in_o it_o to_o a_o deep_a green_n and_o this_o by_o the_o way_n may_v be_v the_o reason_n why_o often_o time_n when_o the_o oil_n of_o some_o spice_n and_o of_o anniseed_n etc._n etc._n be_v distil_v in_o a_o limbec_n with_o water_n the_o water_n as_o i_o have_v several_a time_n observe_v come_v over_o whitish_a and_o will_v perhaps_o continue_v so_o for_o a_o good_a while_n because_o if_o the_o fire_n be_v make_v too_o strong_a the_o subtle_a chemical_a oil_n be_v thereby_o much_o agitate_a and_o break_a and_o blend_v with_o the_o water_n in_o such_o numerous_a and_o minute_n globules_n as_o can_v easy_o in_o a_o short_a time_n emerge_n to_o the_o top_n of_o the_o water_n and_o whilst_o they_o remain_v in_o it_o make_v it_o for_o the_o reason_n new_o intimate_v look_v whitish_a and_o perhaps_o upon_o the_o same_o ground_n a_o cause_n may_v be_v render_v why_o hot_a water_n be_v observe_v to_o be_v usual_o more_o opacous_a and_o whitish_a than_o the_o same_o water_n cold_a the_o agitation_n turn_v the_o more_o spirituous_a or_o otherwise_o convenient_o dispose_a particle_n of_o the_o water_n into_o vapour_n thereby_o produce_v in_o the_o body_n of_o the_o liquor_n a_o multitude_n of_o small_a bubble_n which_o interrupt_v the_o free_a passage_n that_o the_o beam_n of_o light_n will_v else_o have_v every_o way_n and_o from_o the_o innermost_a part_n of_o the_o water_n reflect_v many_o of_o they_o outward_o these_o and_o the_o like_a example_n pyrophilus_n have_v induce_v i_o to_o suspect_v that_o the_o superficial_a particle_n of_o white_a body_n may_v for_o the_o most_o part_n be_v as_o well_o convex_a as_o smooth_a i_o content_v myself_o to_o say_v suspect_n and_o for_o the_o most_o part_n because_o it_o seem_v not_o easy_a to_o prove_v that_o when_o diaphanous_a body_n as_o we_o shall_v see_v by_o and_o by_o be_v reduce_v into_o white_a powder_n each_o corpuscle_n must_v needs_o be_v of_o a_o convex_a superficies_n since_o perhaps_o it_o may_v suffice_v that_o specular_a surface_n look_v several_o way_n for_o as_o we_o have_v see_v when_o a_o diaphanous_a body_n come_v to_o be_v reduce_v to_o very_a minute_n part_n it_o thereby_o require_v a_o multitude_n of_o little_a surface_n within_o 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seem_v to_o be_v very_o perfect_o and_o thus_o far_o we_o have_v try_v the_o experiment_n and_o find_v it_o to_o succeed_v even_o by_o the_o light_n of_o candle_n of_o the_o large_a size_n if_o you_o so_o hold_v the_o vial_n over_o against_o your_o eye_n that_o it_o may_v have_v a_o window_n on_o one_o side_n of_o it_o and_o a_o dark_a part_n of_o the_o room_n both_o before_o it_o and_o on_o the_o other_o side_n you_o shall_v see_v the_o liquor_n partly_o of_o a_o bluish_a and_o partly_o of_o a_o golden_a colour_n if_o turn_v your_o back_n to_o the_o window_n you_o power_n out_o some_o of_o the_o liquor_n towards_o the_o light_n and_o towards_o your_o eye_n it_o will_v seem_v at_o the_o come_n out_o of_o the_o glass_n to_o be_v perfect_o coeruleous_a but_o when_o it_o be_v sallen_v down_o a_o little_a way_n the_o drop_n may_v seem_v particoloured_a according_a as_o the_o beam_n of_o light_n do_v more_o or_o less_o full_o penetrate_v and_o illustrate_v they_o if_o you_o take_v a_o basin_n about_o half_a full_a of_o water_n and_o have_v place_v it_o so_o in_o the_o sunbeam_n shine_v into_o a_o room_n that_o one_o part_n of_o the_o water_n may_v be_v free_o illustrate_v by_o the_o beam_n of_o light_n and_o the_o other_o part_n of_o it_o darken_v by_o the_o shadow_n of_o the_o brim_n of_o the_o basin_n if_o then_o i_o say_v you_o drop_v of_o our_o tincture_n make_v somewhat_o strong_a both_o into_o the_o shade_v and_o illuminate_v part_n of_o the_o water_n you_o may_v by_o look_v upon_o it_o from_o several_a place_n and_o by_o a_o little_a agitation_n of_o the_o water_n observe_v divers_a please_a phoenomena_fw-la which_o be_v tedious_a to_o particularize_v if_o you_o power_n a_o little_a of_o this_o tincture_n upon_o a_o sheet_n of_o white_a paper_n so_o as_o the_o liquor_n may_v remain_v of_o some_o depth_n upon_o it_o you_o may_v perceive_v the_o neighbour_a drop_n to_o be_v partly_o of_o one_o colour_n and_o partly_o of_o the_o other_o according_a to_o the_o position_n of_o your_o eye_n in_o reference_n to_o the_o light_n when_o it_o look_v upon_o they_o but_o if_o you_o power_n off_o all_o the_o liquor_n the_o paper_n will_v seem_v die_v of_o a_o almost_o yellow_a colour_n and_o if_o a_o sheet_n of_o paper_n with_o some_o of_o this_o liquor_n in_o it_o be_v place_v in_o a_o window_n where_o the_o sunbeam_n may_v shine_v free_o on_o it_o then_o if_o you_o turn_v your_o back_n to_o the_o sun_n and_o take_v a_o pen_n or_o some_o such_o slender_a body_n and_o hold_v it_o overthwart_a betwixt_o the_o sun_n and_o the_o liquor_n you_o may_v perceive_v that_o the_o shadow_n project_v by_o the_o pen_n upon_o the_o liquor_n will_v not_o all_o of_o it_o be_v a_o vulgar_a and_o dark_a but_o in_o part_n a_o curious_o colour_a shadow_n that_o edge_n of_o it_o which_o be_v next_o the_o body_n that_o make_v it_o be_v almost_o of_o a_o lively_a golden_a colour_n and_o the_o remote_a verge_n of_o a_o coeruleous_a one_o these_o and_o other_o phoenomena_fw-la which_o i_o have_v observe_v in_o this_o delightful_a experiment_n divers_a of_o my_o friend_n have_v look_v upon_o not_o without_o some_o wonder_n and_o i_o remember_v a_o excellent_a oculist_n find_v by_o accident_n in_o a_o friend_n chamber_n a_o fine_a vial_n full_a of_o this_o liquor_n which_o i_o have_v give_v that_o friend_n and_o have_v never_o hear_v any_o thing_n of_o the_o experiment_n nor_o have_v any_o body_n near_o he_o that_o can_v tell_v he_o what_o this_o strange_a liquor_n may_v be_v be_v a_o great_a while_n apprehensive_a as_o he_o present_o after_o tell_v i_o that_o some_o strange_a new_a distemper_n be_v invade_v his_o eye_n and_o i_o confess_v that_o the_o unusualness_n of_o the_o phoenomena_fw-la make_v i_o very_o solicitous_a to_o find_v out_o the_o cause_n of_o this_o experiment_n and_o though_o i_o be_o far_o from_o pretend_v to_o have_v find_v it_o yet_o my_o inquiry_n have_v i_o suppose_v enable_v i_o to_o give_v such_o hint_n as_o may_v lead_v your_o great_a sagacity_n to_o the_o discovery_n of_o the_o cause_n of_o this_o wonder_n and_o first_o find_v that_o this_o tincture_n if_o it_o be_v too_o copious_a in_o the_o water_n keep_v the_o colour_n from_o be_v so_o lively_a and_o their_o change_n from_o be_v so_o discernible_a and_o find_v also_o that_o the_o impregnate_a virtue_n of_o this_o wood_n do_v by_o its_o be_v frequent_o infuse_v in_o new_a water_n by_o degree_n decay_n i_o conjecture_v that_o the_o tincture_n afford_v by_o the_o wood_n must_v proceed_v from_o some_o subtle_a part_n of_o it_o draw_v forth_o by_o the_o water_n which_o swim_v too_o and_o fro_o in_o it_o do_v so_o modify_v the_o light_n as_o to_o exhibit_v such_o and_o such_o colour_n and_o because_o these_o subtle_a part_n be_v so_o easy_o soluble_a even_o in_o cold_a water_n i_o conclude_v that_o they_o must_v abound_v with_o salt_n and_o perhaps_o contain_v much_o of_o the_o essential_a salt_n as_o the_o chemist_n call_v it_o of_o the_o wood._n and_o to_o try_v whether_o these_o subtle_a part_n be_v volatile_a enough_o to_o be_v distil_v without_o the_o dissolution_n of_o their_o texture_n i_o careful_o distil_v some_o of_o the_o tinct_a liquor_n in_o very_o low_a vessel_n and_o the_o gentle_a heat_n of_o a_o lamp_n furnace_n but_o find_v all_o that_o come_v over_o to_o be_v as_o limpid_n and_o colourless_a as_o rock-water_n and_o the_o liquor_n remain_v in_o the_o vessel_n to_o be_v so_o deep_o coeruleous_a that_o it_o require_v to_o be_v oppose_v to_o a_o very_a strong_a light_n to_o appear_v of_o any_o other_o colour_n i_o take_v likewise_o a_o vial_n with_o spirit_n of_o wine_n and_o a_o little_a salt_n of_o hartshorn_n and_o find_v that_o there_o be_v a_o certain_a proportion_n to_o be_v meet_v with_o betwixt_o the_o liquor_n and_o the_o salt_n which_o make_v the_o mixture_n fit_a to_o exhibit_v some_o little_a variety_n of_o colour_n not_o observable_a in_o ordinary_a liquor_n as_o it_o be_v various_o direct_v in_o reference_n to_o the_o light_n and_o the_o eye_n but_o this_o change_n of_o colour_n be_v very_o far_o short_a from_o that_o which_o we_o have_v admire_v in_o our_o tincture_n but_o however_o i_o suspect_v that_o the_o ting_a particle_n do_v abound_v with_o such_o salt_n who_o texture_n and_o the_o colour_n spring_v from_o it_o will_v probable_o be_v alter_v by_o pierce_a acid_n salt_n which_o will_v in_o likelihood_n either_o make_v some_o dissipation_n of_o their_o part_n or_o associate_v themselves_o to_o the_o like_a body_n and_o either_o way_n alter_v the_o colour_n exhibit_v by_o they_o whereupon_o pour_v into_o a_o small_a vial_n full_a of_o impregnated_a water_n a_o very_a little_a spirit_n of_o vinegar_n i_o find_v that_o according_a to_o my_o expectation_n the_o coeruleous_a colour_n immediate_o vanish_v but_o be_v deceive_v in_o the_o expectation_n i_o have_v that_o the_o golden_a colour_n will_v do_v so_o too_o for_o which_o way_n soever_o i_o turn_v the_o vial_n either_o to_o or_o from_o the_o light_n i_o find_v the_o liquor_n to_o appear_v always_o of_o a_o yellowish_a colour_n and_o no_o other_o upon_o this_o i_o imagine_v that_o the_o acid_n salt_n of_o the_o vinegar_n have_v be_v able_a to_o deprive_v the_o liquor_n of_o its_o coeruleous_a colour_n a_o sulphureous_a salt_n be_v of_o a_o contrary_a nature_n will_v be_v able_a to_o mortify_v the_o saline_n particle_n of_o vinegar_n and_o destroy_v their_o effect_n and_o according_o have_v place_v myself_o betwixt_o the_o window_n and_o the_o vial_n and_o into_o the_o same_o liquor_n drop_v a_o few_o drop_n of_o oil_n of_o tartar_n per_fw-la deliquium_fw-la as_o chemist_n call_v it_o i_o observe_v with_o pleasure_n that_o immediate_o upon_o the_o diffusion_n of_o this_o liquor_n the_o impregnated_a water_n be_v restore_v to_o its_o former_a coeruleous_a colour_n and_o this_o liquor_n of_o tartar_n be_v very_a ponderous_n and_o fall_v at_o first_o to_o the_o bottom_n of_o the_o vial_n it_o be_v easy_a to_o observe_v that_o for_o a_o little_a while_o the_o low_a part_n of_o the_o liquor_n appear_v deep_o coeruleous_a whilst_o all_o the_o upper_a part_n retain_v its_o former_a yellowness_n which_o it_o immediate_o lose_v as_o soon_o as_o either_o agitation_n or_o time_n have_v make_v a_o competent_a diffusion_n of_o the_o liquor_n of_o tartar_n through_o the_o body_n of_o the_o former_a tincture_n and_o this_o restore_v liquor_n do_v as_o it_o be_v look_v upon_o against_o or_o from_o the_o light_n exhibit_v the_o same_o phaenomena_n as_o the_o tinct_a water_n do_v before_o either_o of_o the_o adventitious_a liquor_n be_v pour_v into_o it_o have_v make_v pyrophilus_n divers_a trial_n upon_o this_o nephritick_n wood_n we_o find_v mention_v make_v of_o it_o by_o the_o industrious_a jesuit_n kircherus_n who_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 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have_v already_o manifest_v by_o a_o multitude_n of_o instance_n nor_o do_v it_o seem_v so_o strange_a because_o saline_n particle_n swim_v up_o and_o down_o in_o liquor_n have_v be_v by_o many_o observe_v to_o be_v very_o operative_a in_o the_o production_n and_o change_n of_o colour_n but_o divers_a of_o our_o friend_n that_o be_v not_o acquaint_v with_o chemical_a operation_n have_v think_v it_o very_o strange_a that_o a_o white_a body_n and_o a_o dry_a one_o too_o shall_v immediate_o acquire_v a_o rich_a new_a colour_n upon_o the_o bare_a affusion_n of_o spring-water_n destitute_a as_o well_o of_o adventitious_a salt_n as_o of_o tincture_n and_o yet_o pyrophilus_n the_o way_n of_o produce_v such_o a_o change_n of_o colour_n may_v be_v easy_o enough_o light_v on_o by_o those_o that_o be_v conversant_a in_o the_o solution_n of_o mercury_n for_o we_o have_v try_v that_o though_o by_o evaporate_n a_o solution_n of_o quicksilver_n in_o aquafortis_n and_o abstract_v the_o liquor_n till_o 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the_o body_n it_o imbibe_v to_o convene_v into_o cluster_n dispose_v after_o the_o manner_n requisite_a to_o the_o exhibit_v of_o the_o emergent_a colour_n the_o experiment_n be_v this_o experiment_n xliii_o we_o take_v good_a common_a vitriol_n and_o have_v beat_v it_o to_o powder_n and_o put_v it_o into_o a_o crucible_n we_o keep_v it_o melt_v in_o a_o gentle_a heat_n till_o by_o the_o evaporation_n of_o some_o part_n and_o the_o shuffle_n of_o the_o rest_n it_o have_v quite_o lose_v its_o former_a colour_n what_o remain_v we_o take_v out_o and_o find_v it_o to_o be_v a_o friable_a calx_fw-la of_o a_o dirty_a grace_n on_o this_o we_o pour_v fair_a water_n which_o it_o do_v not_o colour_n green_n or_o blue_n but_o only_o seem_v to_o make_v a_o muddy_a mixture_n with_o it_o then_o stop_v the_o vial_n wherein_o the_o ingredient_n be_v put_v we_o let_v it_o stand_v in_o a_o quiet_a place_n for_o some_o day_n and_o after_o many_o hour_n the_o water_n have_v dissolve_v a_o good_a part_n 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show_v how_o much_o some_o colour_n depend_v upon_o the_o less_o or_o great_a mixture_n and_o as_o it_o be_v contemperation_n of_o the_o light_n with_o shade_n to_o observe_v how_o that_o sometime_o the_o number_n of_o particle_n of_o the_o same_o colour_n receive_v into_o the_o pore_n of_o a_o liquor_n or_o swim_v up_o and_o down_o in_o it_o do_v seem_v much_o to_o vary_v the_o colour_n of_o it_o i_o can_v here_o present_v you_o with_o particular_a instance_n to_o show_v how_o in_o many_o if_o not_o most_o consistent_a body_n if_o the_o colour_n be_v not_o a_o light_a one_o as_o white_a yellow_a or_o the_o like_a the_o closeness_n of_o part_n in_o the_o pigment_n make_v it_o look_v blackish_a though_o when_o it_o be_v display_v and_o lay_v on_o thin_o it_o will_v perhaps_o appear_v to_o be_v either_o blue_n or_o green_n or_o red._n but_o the_o colour_n of_o consistent_a pigment_n not_o be_v those_o which_o the_o preamble_n of_o this_o experiment_n have_v lead_v you_o to_o expect_v 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yet_o since_o many_o have_v complain_v as_o well_o as_o i_o have_v do_v that_o they_o can_v find_v no_o such_o odoriferous_a but_o rather_o a_o ill-sented_n liquor_n and_o scarce_o any_o oil_n in_o their_o distillation_n of_o that_o sweet_a vitriol_n a_o wary_a person_n will_v as_o little_o build_v any_o thing_n on_o what_o they_o say_v of_o the_o former_a experiment_n as_o upon_o what_o they_o aver_v of_o the_o late_a and_o therefore_o i_o scruple_v not_o to_o mention_v this_o red_a balsam_n of_o which_o i_o have_v not_o see_v any_o but_o what_o i_o make_v among_o my_o other_o experiment_n about_o redness_n annot._fw-la ii_o we_o have_v sometime_o have_v the_o curiosity_n to_o try_v what_o colour_n mineral_n as_o tin-glass_n antimony_n spelter_n etc._n etc._n will_v yield_v in_o several_a menstruum_n nor_o have_v we_o forbear_v to_o try_v the_o colour_n of_o stone_n of_o which_o that_o famous_a one_o which_o helmont_n call_v paracelsus_n ludus_fw-la though_o it_o be_v dig_v out_o of_o the_o earth_n and_o seem_v a_o true_a stone_n have_v afford_v in_o menstruum_n capable_a to_o dissolve_v so_o solid_a a_o stone_n sometime_o a_o yellowish_a sometime_o a_o red_a solution_n of_o both_o which_o i_o can_v show_v you_o but_o though_o i_o have_v from_o mineral_n obtain_v with_o several_a menstruum_n very_o differ_v colour_n and_o some_o such_o as_o perhaps_o you_o will_v be_v surprise_v to_o see_v draw_v from_o such_o body_n yet_o i_o must_v now_o pass_v by_o the_o particular_n be_v desirous_a to_o put_v a_o end_n to_o this_o treatise_n before_o i_o put_v a_o end_n to_o your_o patience_n and_o my_o own_o annotation_n iii_o and_o yet_o before_o i_o pass_v to_o the_o next_o experiment_n i_o must_v put_v you_o in_o mind_n that_o the_o colour_n of_o metal_n may_v in_o many_o case_n be_v further_o alter_v by_o employ_v either_o praecipitate_v salt_n or_o other_o convenient_a substance_n to_o act_v upon_o their_o solution_n of_o this_o you_o may_v remember_v that_o i_o have_v 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so_o that_o there_o remain_v a_o white_a calx_fw-la expose_v that_o to_o several_a degree_n of_o fire_n and_o afterward_o to_o a_o naked_a one_o we_o obtain_v some_o new_a colour_n and_o at_o length_n the_o great_a part_n of_o the_o calx_fw-la lie_v at_o the_o bottom_n of_o the_o vial_n and_o be_v bring_v partly_o to_o a_o deep_a yellow_a and_o partly_o to_o a_o red_a colour_n the_o rest_n appear_v elevate_v to_o the_o upper_a part_n and_o neck_n of_o the_o vial_n some_o in_o the_o form_n of_o a_o reddish_n and_o some_o of_o a_o ash-colour_n sublimate_n but_o of_o the_o differ_a colour_n which_o by_o differ_v way_n and_o work_n of_o quick_a silver_n with_o fire_n and_o saline_n body_n may_v be_v produce_v in_o precipitate_v i_o may_v elsewhere_o have_v occasion_n to_o take_v further_a notice_n i_o also_o tell_v you_o not_o long_o since_o that_o if_o you_o corrode_v quicksilver_n with_o oil_n of_o vitriol_n instead_o of_o aquafortis_n and_o abstract_n the_o menstruum_fw-la there_o will_v remain_v a_o white_a calx_fw-la which_o by_o the_o affusion_n of_o fair_a water_n present_o turn_v into_o a_o lemon_n colour_n and_o even_o the_o succedaneum_n to_o a_o menstruum_fw-la may_v sometime_o serve_v the_o turn_n to_o change_v the_o colour_n of_o a_o metal_n the_o lovely_a red_a which_o painter_n call_v vermillion_a be_v make_v of_o mercury_n which_o be_v of_o the_o colour_n of_o silver_n and_o of_o brimstone_n which_o be_v of_o kin_n to_o that_o of_o gold_n sublimed_a up_o together_o in_o a_o certain_a proportion_n as_o be_v vulgar_o know_v to_o spagyrist_n experiment_n xlviii_o the_o three_o chief_a sort_n of_o the_o adventitious_a colour_n of_o metal_n be_v that_o which_o be_v produce_v by_o associate_a they_o especial_o when_o calcine_v with_o other_o fusible_a body_n and_o principal_o venice_n and_o other_o fine_a glass_n devoid_a of_o colour_n i_o have_v former_o give_v you_o a_o example_n whereby_o it_o may_v appear_v that_o a_o metal_n may_v impart_v to_o 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to_o think_v he_o have_v find_v in_o this_o stone_n no_o slight_a confirmation_n of_o his_o ingenious_a master_n hypothesis_n touch_v the_o generation_n of_o light_n in_o sublunary_a body_n not_o sensible_o hot._n a_o postscript_n annex_v some_o hour_n after_o the_o observation_n be_v write_v so_o many_o particular_n take_v notice_n of_o in_o one_o night_n may_v shine_v make_v this_o stone_n appear_v a_o kind_n of_o prodigy_n and_o the_o rather_o because_o have_v try_v as_o i_o former_o note_v not_o only_o a_o fine_a artificial_a crystal_n and_o some_o also_o that_o be_v natural_a but_o a_o ruby_n and_o two_o diamond_n i_o do_v not_o find_v that_o any_o of_o these_o disclose_v the_o like_a glimmer_n of_o light_n yet_o after_o all_o perceive_v by_o the_o hardness_n and_o the_o testimony_n of_o a_o skilful_a goldsmith_n that_o this_o be_v rather_o a_o natural_a than_o artificial_a stone_n for_o fear_n lest_o there_o may_v be_v some_o difference_n in_o the_o way_n of_o set_v or_o in_o 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part_n seven_o book_n 3._o chap._n sect._n 5._o purchas_n ibid._n purchas_n ibid._n in_o sin_n see_v scaliger_n exercit._n 325._o sect._n 9_o nicolaus_n monardes_n lib._n simplic_n ex_fw-la india_n allator_fw-la cap._n 27._o kircher_n art_n mag._n ducis_fw-la &_o umbrae_fw-la lib._n 1._o part_n 3._o herbarist_n be_v wont_a to_o call_v this_o plant_n cyanus_n vulgaris_fw-la minor_fw-la paracelsus_n de_fw-fr mineral_n tract_n 1._o pag._n m._n 242._o see_v parkinson_n th._n botan_n trib._n 9_o cap._n 26._o parkinson_n thea_fw-mi bot._n trib._n 4._o cap._n 12._o beguinus_n tyr._n chy._n lib._n 2o._o cap._n 13o._o libr._n 2_o â—o_o cap._n 340._o see_v the_o latter_a end_n of_o the_o fifty_o experiment_n experiment_n the_o curious_a reader_n that_o desire_v further_a information_n concern_v lake_n may_v resort_v to_o the_o seven_o book_n of_o neri_n art_n of_o glass_n english_v 6_o or_o 7_o year_n since_o the_o write_n of_o this_o 49th_o experiment_n and_o illustrate_v with_o learned_a observation_n by_o the_o inquisitive_a and_o experience_a dr._n charles_n merret_n boetius_fw-la de_fw-la boot_n gem._n &_o lapid_n histor_n lib._n 2._o cap._n 8._o musaei_n wormiani_n cap._n 17._o purchas_n pilgrim_n lib._n 1._o cap._n 4._o pag._n 104._o in_o the_o year_n 1619._o behvonuâ—o_o cellini_n nell_n aree_n del_o gioiellar_n lib._n 1._o pag._n 10._o 10._o the_o narrative_a in_o the_o author_n own_o word_n be_v this_o ego_fw-la say_v he_o sanctè_fw-la affirmare_fw-la possum_fw-la i_o unam_fw-la aureo_fw-la annulo_fw-la inclusam_fw-la perpetuo_fw-la gestare_fw-la cujus_fw-la facultatem_fw-la si_fw-la gemmae_fw-la est_fw-la nunquam_fw-la satis_fw-la admirari_fw-la potui_fw-la gestaverat_fw-la enim_fw-la ante_fw-la triginta_fw-la annos_fw-la hispanus_n quidam_fw-la non_fw-la procula_fw-la puternis_fw-la aedibus_fw-la habitans_fw-la be_v cum_fw-la vitâ-functus_a esset_fw-la &_o ipsius_fw-la suspellex_fw-la ut_fw-la moris_fw-la apud_fw-la nos_fw-la est_fw-la venum_fw-la exposita_fw-la esset_fw-la inter_fw-la cetera_fw-la etiam_fw-la turcois_fw-fr exponebatur_fw-la verum_fw-la nemo_fw-la licet_fw-la complures_fw-la co_fw-la concurrissent_fw-la ut_fw-la eam_fw-la propter_fw-la coloris_fw-la elegantiam_fw-la quam_fw-la vivo_fw-la domino_fw-la habuerat_fw-la emerent_fw-la sibi_fw-la emptam_fw-la voluit_fw-la pristinum_fw-la enim_fw-la nitorem_fw-la &_o colorem_fw-la prorsus_fw-la amiserat_fw-la ut_fw-la potius_fw-la malachites_n quam_fw-la turcois_fw-fr videretur_fw-la aderat_fw-la tum_fw-la temporis_fw-la gemmae_fw-la habendae_fw-la desiderio_fw-la etiam_fw-la parens_fw-la &_o frater_fw-la meus_fw-la qui_fw-la antea_fw-la saepius_fw-la gratiam_fw-la &_o elegantiam_fw-la ipsius_fw-la viderant_fw-la mirabundi_fw-la cam_fw-la nunc_fw-la tam_fw-la esse_fw-la deformem_fw-la emit_fw-la cam_fw-la nihilominus_fw-la pater_fw-la satisfy_v vili_fw-la pretio_fw-la qua_fw-la omnibus_fw-la contemptui_fw-la crat_fw-mi ac_fw-la present_n non_fw-la eam_fw-la esse_fw-la 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that_o a_o warm_a liquor_n will_v not_o extinguish_v light_n in_o the_o diamond_n i_o think_v fit_a to_o try_v whether_o by_o reason_n of_o its_o warmth_n it_o will_v not_o excite_v it_o and_o divers_a time_n i_o find_v that_o if_o it_o be_v keep_v therein_o till_o the_o water_n have_v leisure_n to_o communicate_v some_o of_o its_o heat_n to_o it_o it_o will_v often_o shine_v as_o soon_o as_o it_o be_v take_v out_o and_o probable_o we_o shall_v have_v see_v it_o shine_v more_o whilst_o it_o be_v in_o the_o water_n if_o some_o degree_n of_o opacity_n which_o heat_a water_n be_v wont_a to_o acquire_v upon_o the_o score_n of_o the_o numerous_a little_a bubble_n generate_v in_o it_o have_v not_o keep_v we_o from_o discern_v the_o lustre_n of_o the_o stone_n stone_n i_o after_o bethink_v myself_o of_o employ_v a_o way_n which_o produce_v the_o desire_a effect_n both_o soon_o and_o better_o for_o hold_v betwixt_o my_o finger_n a_o steel_n bodkin_n near_o the_o low_a part_n of_o it_o i_o press_v the_o point_n hard_o against_o the_o surface_n of_o the_o diamond_n and_o much_o more_o if_o i_o strike_v the_o point_n against_o it_o the_o coruscation_n will_v be_v extreme_o sudden_a and_o very_a vivid_n though_o very_o vanish_v too_o and_o this_o way_n which_o common_o much_o surprise_v and_o please_v the_o spectator_n seem_v far_o more_o proper_a than_o the_o other_o to_o show_v that_o pressure_n alone_o if_o forcible_a enough_o though_o it_o be_v so_o sudden_a and_o short_a that_o it_o can_v not_o well_o be_v suppose_v to_o give_v the_o stone_n any_o thing_n near_o a_o sensible_a degree_n of_o warmth_n as_o may_v be_v suspect_v of_o rub_v yet_o it_o be_v sufficient_a to_o generate_v a_o very_a vivid_n light_n we_o afterward_o try_v precious_a stone_n as_o diamond_n ruby_n saphire_n and_o emerall_n etc._n etc._n but_o find_v not_o any_o of_o they_o to_o shine_v except_o some_o diamond_n and_o of_o these_o we_o be_v not_o upon_o so_o little_a practice_n able_a to_o foretell_v before_o hand_n which_o will_v be_v bring_v to_o shine_v and_o which_o will_v not_o for_o several_a very_o good_a diamond_n either_o will_v not_o shine_v at_o all_o or_o much_o less_o than_o other_o that_o be_v far_o inferior_a to_o they_o and_o yet_o those_o ingenious_a man_n be_v mistake_v that_o think_v a_o diamond_n must_v be_v foul_a and_o cloudy_a as_o mr._n claytons_n be_v to_o be_v fit_a for_o shine_v for_o as_o we_o can_v bring_v some_o such_o to_o afford_v a_o glimmer_a light_n so_o with_o some_o clear_a and_o excellent_a diamond_n we_o can_v do_v the_o like_a but_o none_o of_o those_o many_o that_o we_o try_v of_o all_o kind_n be_v equal_a to_o the_o diamond_n on_o which_o the_o observation_n be_v make_v not_o only_o consider_v the_o degree_n of_o light_n it_o affotd_v but_o the_o easiness_n wherewith_o it_o be_v excite_v and_o the_o comparative_o great_a duration_n of_o its_o shine_v