with_o borax_n be_v of_o a_o more_o diluted_a colour_n yet_o by_o be_v urge_v with_o a_o violent_a fire_n it_o be_v colour_n be_v heighten_v blue_n vitriol_n burn_v till_o it_o may_v be_v rub_v to_o a_o powder_n betwixt_o one_o finger_n will_v acquire_v a_o white_a colour_n but_o if_o urge_v by_o a_o great_a heat_n it_o will_v pass_v through_o other_o colour_n as_o grey_a yellowish_a and_o red_a and_o when_o it_o be_v almost_o calcine_v thorough_o it_o will_v be_v of_o a_o dark_a purple_a near_o to_o a_o black_a colour_n to_o these_o i_o may_v add_v that_o crocus_n martis_n per_fw-la se_fw-la be_v not_o so_o near_o a_o white_a as_o the_o iron_n it_o be_v prepare_v from_o and_o that_o judicious_a traveller_n bellonius_fw-la tell_v we_o that_o a_o white_a charcoal_n be_v make_v of_o the_o wood_n of_o oxyceder_n experiment_n v._n though_o camphire_n keep_v in_o close_a glass_n will_v not_o lose_v its_o colour_n by_o heat_n yet_o be_v set_v on_o fire_n in_o the_o free_a air_n it_o emit_v smoke_n copious_o and_o a_o concave_a glass_n with_o a_o hole_n in_o the_o middle_a be_v turn_v upon_o it_o it_o continue_v burn_v and_o cover_v the_o inside_n of_o the_o glass_n with_o a_o black_a soot_n which_o be_v so_o copious_a that_o the_o whole_a substance_n of_o the_o camphire_n seem_v convert_v into_o soot_n experiment_n vi._n rectify_v oil_n of_o vitriol_n be_v gradual_o mix_v with_o essential_a oil_n of_o wormwood_n draw_v over_o with_o store_n of_o water_n in_o a_o alembick_a this_o mixture_n be_v distil_v in_o a_o retort_n where_o the_o caput_fw-la mortuum_n that_o remain_v be_v black_a and_o the_o like_v succeed_v with_o oil_n of_o winter-savory_n make_v use_v of_o instead_o of_o the_o oil_n of_o wormwood_n experiment_n vii_o to_o render_v yellow_a wax_n white_a put_v a_o sufficient_a quantity_n of_o it_o into_o a_o bolt-head_n with_o spirit_n of_o wine_n and_o place_n it_o in_o a_o sand-heat_n gradual_o increase_v till_o the_o wine_n begin_v to_o boil_v and_o then_o the_o wax_n be_v melt_v the_o mixture_n will_v be_v white_a which_o upon_o a_o evaportion_n of_o the_o most_o subtle_a part_n of_o the_o wine_n will_v subside_o into_o less_o room_n than_o before_o and_o one_o thing_n remarkable_a in_o this_o experiment_n be_v that_o the_o yellow_a colour_n will_v neither_o remain_v in_o the_o wax_n nor_o the_o spirit_n of_o wine_n separate_v by_o a_o filtre_n of_o brown_a paper_n whilst_o it_o be_v hot_a experiment_n viii_o two_o part_n of_o sublimate_n be_v mix_v with_o one_o of_o tin-glass_n and_o sublimed_a together_o the_o matter_n which_o ascend_v be_v of_o a_o peculiar_a texture_n make_v up_o of_o thin_a smooth_a soft_a and_o slippery_a plate_n much_o like_o the_o scale_n of_o fish_n and_o of_o a_o shine_a colour_n much_o like_o orient_a pearl_n experiment_n ix_o if_o a_o mixture_n of_o gold_n and_o silver_n be_v cast_v into_o aq._n fortis_fw-la the_o gold_n fall_v to_o the_o bottom_n will_v be_v turn_v black_a though_o neither_o the_o silver_n or_o aq._n fortis_fw-la be_v of_o that_o colour_n it_o be_v look_v upon_o by_o alchemist_n that_o a_o mineral_n abound_v with_o gold_n if_o it_o precipitate_v a_o black_a powder_n and_o it_o have_v be_v observe_v that_o gold_n and_o silver_n refine_v will_v full_o white_z cloth_n by_o rub_v they_o on_o it_o and_o i_o have_v likewise_o take_v notice_n that_o pen_n will_v be_v colour_v black_a by_o a_o silver_n case_n i_o keep_v they_o in_o experiment_n x._o that_o a_o solution_n of_o silver_n will_v colour_v hair_n black_a have_v often_o be_v find_v and_o i_o have_v observe_v that_o silver_n dissolve_v in_o aq._n fortis_fw-la and_o evaporate_v ad_fw-la siccitatem_fw-la and_o clear_v from_o their_o greenish_a blewness_n by_o a_o successive_a affusion_n and_o evaporation_n of_o fair_a water_n this_o calx_fw-la be_v lay_v either_o upon_o the_o skin_n or_o haft_n of_o knife_n will_v stain_v they_o with_o a_o last_a black_a colour_n experiment_n xi_o in_o order_n to_o discover_v the_o reason_n of_o the_o blackness_n of_o negro_n and_o the_o colour_n of_o fox_n and_o hare_n as_o well_o as_o other_o animal_n i_o shall_v subjoin_v some_o collection_n i_o have_v make_v for_o that_o purpose_n and_o first_o though_o it_o be_v believe_v that_o the_o blackness_n of_o the_o skin_n of_o negro_n depend_v on_o the_o heat_n of_o the_o sun_n which_o in_o other_o hot_a country_n be_v observe_v to_o darken_v the_o complexion_n of_o man_n more_o than_o in_o england_n yet_o i_o be_o apt_a to_o believe_v that_o something_o else_o be_v requisite_a to_o the_o production_n of_o those_o colour_n beside_o the_o influence_n of_o the_o sun_n since_o we_o see_v that_o infant_n be_v of_o the_o same_o colour_n beside_o in_o other_o place_n of_o the_o same_o latitude_n the_o people_n be_v observe_v to_o be_v at_o the_o most_o but_o tawny_a and_o several_a nation_n in_o the_o empire_n of_o aethiopia_n situate_v almost_o under_o the_o torrid_a zone_n and_o it_o be_v observe_v by_o traveller_n and_o navigator_n that_o there_o be_v very_o few_o black_n in_o america_n though_o the_o new_a world_n contain_v many_o climate_n and_o reach_n from_o one_o tropic_a to_o another_o and_o though_o the_o dane_n be_v white_a than_o the_o spaniard_n yet_o it_o be_v observe_v that_o the_o swede_n who_o likewise_o inhabit_v those_o cold_a country_n be_v not_o so_o white_a as_o they_o and_o i_o have_v see_v several_a russian_n who_o be_v of_o a_o much_o brown_a complexion_n than_o the_o dane_n though_o these_o be_v say_v to_o proceed_v from_o a_o race_n of_o tartar_n for_o in_o one_o province_n the_o muscovite_n be_v observe_v to_o be_v much_o white_a and_o i_o be_o tell_v that_o negro_n live_v not_o far_o from_o the_o cape_n of_o good_a hope_n which_o be_v beyond_o the_o southern_a tropic_n though_o near_o the_o same_o degree_n of_o latitude_n northward_o divers_a american_n nation_n be_v not_o inhabit_v by_o negro_n and_o the_o inhabitant_n of_o candia_n some_o part_n of_o sicily_n and_o even_o spain_n be_v not_o so_o much_o as_o tawny_a moor_n and_o even_o the_o inhabitant_n of_o greenland_n be_v observe_v to_o be_v of_o a_o olive-colour_n or_o a_o dark_a complexion_n but_o nevertheless_o that_o coldness_n may_v in_o some_o measure_n contribute_v to_o blackness_n or_o whiteness_n appear_v from_o what_o have_v be_v observe_v in_o russia_n and_o livonia_n viz._n that_o hare_n and_o fox_n become_v white_a in_o winter_n and_o regain_v their_o genuine_a colour_n again_o in_o the_o summer_n yet_o in_o curland_n as_o olaus_n magnus_n relate_v they_o vary_v not_o their_o colour_n in_o the_o winter_n though_o this_o country_n be_v only_o severve_v from_o livonia_n by_o the_o river_n dugna_fw-la where_o it_o may_v seem_v too_o strange_a to_o be_v credit_v that_o so_o small_a a_o compass_n as_o that_o river_n take_v up_o shall_v diversity_n the_o effect_n of_o cold_a so_o much_o and_o the_o same_o objection_n may_v be_v make_v in_o respect_n of_o the_o moor_n since_o negro_n inhabit_v on_o one_o side_n the_o river_n cenega_n and_o tawny_a colour_a people_n on_o the_o other_o another_o opinion_n concern_v the_o colour_n of_o negro_n be_v that_o it_o be_v a_o curse_n entail_v upon_o the_o race_n of_o cham._n but_o not_o to_o shift_v off_o the_o natural_a cause_n of_o that_o colour_n by_o fly_v to_o a_o principal_a and_o universal_a cause_n whilst_o there_o be_v no_o necessity_n of_o it_o not_o to_o urge_v that_o the_o curse_v pronounce_v by_o noah_n be_v that_o he_o shall_v be_v a_o servant_n of_o servant_n which_o be_v fulfil_v when_o the_o posterity_n of_o sem_fw-mi subdue_v the_o canaanite_n i_o see_v not_o why_o blackness_n shall_v be_v esteem_v a_o curse_n since_o the_o negro_n be_v so_o much_o content_n with_o it_o that_o they_o paint_v the_o devil_n white_a nor_o do_v i_o think_v blackness_n inconsistent_a with_o beauty_n since_o it_o consist_v in_o a_o sumetry_n of_o part_n and_o good_a feature_n in_o the_o face_n so_o that_o blackness_n can_v reasonable_o be_v account_v a_o curse_n except_o that_o colour_n cause_v their_o body_n to_o be_v more_o scorch_v by_o the_o heat_n of_o the_o sun_n than_o if_o it_o be_v white_a according_a to_o the_o doctrine_n above_o deliver_v but_o i_o be_o rather_o incline_v to_o think_v that_o they_o proceed_v from_o some_o seminal_a influence_n since_o negro_n as_o well_o as_o american_n transplant_v retain_v their_o proper_a and_o native_a colour_n and_o twin_n which_o be_v get_v by_o the_o portugal_n and_o aethiopian_a woman_n be_v sometime_o one_o of_o they_o white_a and_o the_o other_o black_a and_o how_o far_o seminal_a impression_n contribute_v to_o the_o difference_n of_o organical_a part_n appear_v from_o the_o flat_a nose_n and_o blubber_v lip_n of_o most_o negro_n to_o which_o may_v be_v add_v the_o little_a foot_n of_o the_o chinese_n and_o the_o
more_o apt_a to_o fly_v away_o when_o expose_v to_o the_o air._n and_o that_o vitriol_n may_v probable_o rise_v in_o the_o form_n of_o a_o vapour_n without_o lose_v its_o quality_n be_v evident_a in_o sublimate_n which_o consist_v of_o mercury_n change_v by_o a_o addition_n of_o salt_n and_o vitriol_n for_o some_o vitriolic_a part_n be_v carry_v up_o in_o the_o preparation_n turn_v opacous_a upon_o a_o affusion_n of_o spirit_n of_o sulphur_n but_o further_a to_o make_v it_o evident_a that_o the_o particle_n of_o iron_n may_v be_v considerable_o expanded_a i_o drop_v four_o drop_n of_o a_o vitriolic_a liquor_n make_v use_v of_o in_o copperas-work_n into_o twelve_o ounce_n and_o a_o half_a of_o water_n and_o find_v that_o it_o so_o much_o impregnate_v 1500_o time_n its_o proportion_n of_o common_a water_n as_o to_o make_v it_o strong_a enough_o to_o turn_v a_o tincture_n of_o gall_n purple_a though_o by_o evaporation_n we_o find_v that_o 3_o part_n of_o 4_o of_o that_o liquor_n be_v water_n 28._o what_o alteration_n the_o earthy_a part_n of_o mineral_n water_n undergo_v by_o ignition_n and_o whether_o they_o may_v be_v vitrify_v per_fw-la se_fw-la as_o also_o what_o colour_n they_o impart_v to_o venice_n glass_n if_o mix_v with_o the_o powder_n before_o fluxion_n 29._o of_o what_o use_n they_o be_v in_o bake_v brew_v tan_v or_o die_v of_o colour_n etc._n etc._n 30._o how_o many_o way_n they_o may_v be_v make_v artificial_o and_o with_o what_o proportion_n of_o ingredient_n chap._n xi_o title_n for_o the_o natural_a history_n of_o mineral-water_n consider_v as_o a_o medicine_n it_o may_v be_v worth_a observe_v in_o order_n to_o a_o more_o complete_a natural_a history_n of_o mineral-water_n what_o constitution_n they_o agree_v with_o and_o in_o what_o distemper_n they_o be_v proper_a or_o dangerous_a what_o sensible_a operation_n they_o have_v and_o whether_o their_o effect_n be_v alter_v by_o drink_v they_o hot_a or_o cold_a at_o the_o well_o or_o at_o a_o distance_n from_o it_o whether_o exercise_n or_o the_o warmth_n of_o a_o bed_n promote_v their_o operation_n whether_o they_o have_v any_o occult_a quality_n it_o may_v likewise_o be_v requisite_a to_o observe_v what_o good_a effect_n may_v succeed_v a_o due_a preparation_n of_o the_o body_n that_o drink_v they_o and_o what_o advantage_n it_o may_v be_v to_o drop_v some_o strengthen_v stomachick_n into_o the_o first_o do_v what_o quantity_n be_v enough_o for_o the_o first_o do_v and_o how_o it_o must_v be_v vary_v how_o long_o they_o may_v be_v drink_v and_o whether_o constant_o or_o with_o interval_n whether_o purge_v sometime_o may_v contribute_v to_o their_o good_a effect_n what_o regimen_n in_o the_o six_o non-naturals_a be_v to_o be_v observe_v whilst_o they_o be_v ataking_a which_o be_v the_o sign_n that_o denote_v the_o kindly_a operation_n of_o they_o or_o their_o future_a ill_a effect_n what_o ill_a accident_n attend_v the_o take_n of_o they_o and_o how_o they_o may_v be_v remedy_v or_o prevent_v whether_o it_o be_v proper_a to_o purge_v after_o the_o take_v of_o they_o what_o effect_n they_o will_v have_v by_o mix_v other_o liquor_n with_o they_o or_o by_o boil_a meat_n in_o they_o whether_o a_o salt_n extract_v will_v be_v of_o equal_a effect_n when_o dilute_v in_o fresh_a water_n what_o external_n effect_n they_o will_v have_v and_o of_o what_o use_v their_o sediment_n be_v when_o external_o apply_v what_o effect_n they_o will_v have_v on_o dog_n if_o inject_v into_o their_o vein_n or_o if_o they_o be_v keep_v with_o such_o for_o constant_a drink_n chap._n xii_o of_o the_o natural_a and_o preternatural_a state_n of_o body_n especial_o the_o air._n it_o be_v the_o general_n consent_v of_o most_o man_n that_o the_o determinate_a state_n of_o body_n be_v not_o only_a first_o frame_v by_o what_o they_o call_v nature_n but_o that_o they_o be_v likewise_o preserve_v in_o those_o state_n by_o the_o superintendency_n of_o that_o power_n and_o that_o whenever_o they_o lose_v that_o state_n they_o be_v say_v to_o be_v put_v into_o a_o preternatural_a one_o but_o if_o we_o consider_v that_o such_o change_n proceed_v from_o natural_a cause_n and_o that_o those_o new_a state_n depend_v on_o the_o like_a catholic_n agent_n ground_v the_o common_a distinction_n betwixt_o natural_a and_o preternatural_a state_n ill_o ground_v and_o the_o establish_v law_n of_o nature_n it_o will_v appear_v that_o the_o distinction_n man_n usual_o make_v betwixt_o the_o natural_a and_o preternatural_a state_n of_o body_n be_v but_o ill-grounded_a and_o that_o preternatural_a be_v only_o a_o relative_n term_n intimate_v that_o that_o body_n have_v undergo_v a_o change_n either_o by_o the_o operation_n of_o some_o unheeded_a or_o more_o note_a agent_n for_o matter_n be_v altogether_o void_a of_o sense_n and_o perception_n and_o not_o affect_v one_o state_n more_o than_o another_o the_o change_v it_o undergo_v depend_v on_o the_o alteration_n of_o its_o texture_n and_o new_a position_n of_o its_o part_n alter_v afresh_o by_o that_o agent_n which_o such_o a_o body_n be_v last_o expose_v to_o as_o a_o piece_n of_o wax_n be_v put_v into_o a_o new_a form_n by_o the_o last_o impression_n make_v by_o another_o body_n upon_o it_o without_o affect_v one_o form_n more_o than_o another_o itself_o place_n ice_n a_o natural_a state_n in_o some_o place_n and_o that_o the_o state_n of_o some_o body_n which_o be_v say_v to_o be_v preternatural_a as_o true_o depend_v on_o natural_a cause_n and_o the_o establish_v law_n of_o nature_n as_o other_o be_v evident_a in_o ice_n and_o water_n in_o which_o body_n the_o form_n of_o each_o depend_v upon_o the_o effect_n of_o external_n agent_n for_o though_o in_o these_o hot_a climate_n water_n be_v esteem_v a_o natural_a and_o ice_n a_o preternatural_a state_n of_o that_o substance_n yet_o i_o be_o inform_v that_o in_o siberia_n a_o province_n belong_v to_o a_o russian_a emperor_n water_n be_v freeze_v most_o part_n of_o the_o year_n and_o at_o a_o small_a depth_n from_o the_o surface_n of_o the_o earth_n the_o soil_n be_v freeze_v throughout_o where_o ice_n be_v look_v upon_o to_o be_v the_o natural_a and_o the_o alteration_n make_v by_o a_o thaw_v and_o the_o influence_n of_o the_o external_n temperature_n of_o the_o air_n and_o the_o sun_n beam_n be_v esteem_v preternatural_a state_n of_o body_n and_o further_o though_o butter_n in_o our_o clime_n be_v sell_v in_o a_o consistent_a form_n and_o when_o it_o be_v melt_v be_v look_v upon_o to_o be_v in_o a_o preternatural_a state_n yet_o i_o be_o inform_v that_o among_o the_o european_n it_o be_v fluid_a and_o be_v sell_v by_o measure_n and_o not_o by_o weight_n as_o here_o in_o england_n and_o it_o be_v further_o observe_v that_o several_a substance_n as_o rosin_n of_o jalap_n gum_n lacca_n and_o even_a aloe_n itself_o be_v considerable_o soften_v in_o their_o consistence_n by_o the_o temperature_n of_o the_o air_n and_o the_o force_n of_o external_n heat_n whilst_o they_o pass_v under_o the_o torrid_a zone_n so_o that_o i_o be_o tell_v that_o the_o former_a of_o the_o aforementioned_a drug_n be_v melt_v into_o a_o sort_n of_o balsam_n whilst_o it_o continue_v in_o africa_n but_o when_o it_o be_v bring_v to_o spain_n it_o put_v on_o a_o consistent_a form_n again_o and_o though_o aloe_n be_v soft_a whilst_o carry_v through_o america_n and_o those_o hot_a climate_n yet_o when_o it_o approach_v our_o climate_n it_o present_o become_v hard_a but_o to_o bring_v further_a instance_n concern_v the_o natural_a and_o preternatural_a state_n of_o body_n i_o shall_v observe_v that_o according_a the_o receive_v notion_n of_o natural_a and_o preternatural_a state_n it_o be_v very_o difficult_a to_o determine_v the_o natural_a state_n of_o the_o air_n for_o not_o to_o insist_v on_o the_o different_a temperature_n of_o the_o air_n as_o to_o heat_n and_o cold_a in_o different_a clime_n it_o may_v be_v demand_v since_o heat_n and_o cold_a rarify_v and_o expand_v the_o air_n what_o be_v to_o be_v esteem_v the_o natural_a state_n of_o it_o in_o reference_n to_o rarity_n and_o density_n and_o it_o be_v no_o less_o questionable_a what_o place_n be_v most_o fit_a to_o determine_v its_o natural_a state_n since_o the_o state_n of_o it_o be_v not_o only_o different_a in_o several_a country_n but_o in_o those_o place_n at_o different_a time_n and_o that_o the_o change_n as_o to_o the_o density_n or_o rarity_n of_o the_o air_n be_v very_o frequent_a appear_v by_o the_o several_a degree_n of_o the_o atmosphere_n gravity_n evident_a in_o the_o torrecellian_a experiment_n hereafter_o to_o be_v deliver_v air._n a_o force_a state_n the_o natural_a state_n of_o the_o air._n but_o further_o except_o the_o state_n of_o the_o air_n be_v say_v to_o be_v preternatural_a only_o in_o a_o relative_n sense_n with_o respect_n to_o the_o state_n it_o be_v in_o
mineral_n the_o earth_n be_v stock_v with_o though_o some_o may_v emit_v effluvia_fw-la noxious_a to_o man_n as_o well_o as_o plant_n yet_o in_o that_o variety_n there_o may_v not_o be_v a_o few_o who_o exhalation_n may_v be_v as_o friendly_a to_o he_o for_o tree_n and_o grass_n have_v not_o only_o be_v observe_v to_o flourish_v over_o tin_n mine_n in_o the_o west_n of_o england_n but_o over_o vein_n of_o another_o kind_n of_o mineral_n which_o be_v not_o far_o from_o the_o surface_n of_o the_o earth_n and_o it_o be_v observe_v that_o those_o that_o work_v in_o tin_n mine_n usual_o live_v very_o long_o and_o i_o have_v not_o only_o be_v tell_v that_o the_o fume_n that_o rise_v from_o such_o mine_n though_o often_o very_o bituminous_a and_o of_o a_o offensive_a smell_n yet_o some_o of_o they_o be_v well_o scent_v and_o a_o friend_n of_o i_o who_o cause_v himself_o to_o be_v let_v down_o in_o a_o subterraneal_a cavern_n which_o be_v break_v open_a by_o dig_v for_o a_o mine_n not_o only_o observe_v that_o the_o air_n be_v very_o pleasant_a to_o breath_n but_o likewise_o among_o several_a imperfect_o form_v mineral_n store_n of_o a_o mineral_n earth_n very_o fragrant_a and_o pleasant_a which_o smell_v it_o in_o some_o measure_n retain_v when_o it_o have_v be_v expose_v to_o the_o air_n for_o some_o time_n and_o i_o myself_o have_v observe_v in_o ireland_n a_o piece_n of_o ground_n to_o yield_v very_o good_a though_o short_a grass_n in_o a_o country_n just_o esteem_v healthful_a which_o i_o attribute_v to_o some_o sulphureous_a exhalations-from_a limestone_n which_o have_v have_v so_o considerable_a effect_n in_o other_o place_n that_o i_o be_o tell_v that_o a_o piece_n of_o ground_n in_o derbyshire_n which_o lie_v upon_o limestone_n be_v so_o warm_v by_o the_o vapour_n that_o rise_v from_o it_o that_o snow_n be_v much_o soon_o thaw_v upon_o it_o than_o that_o which_o lie_v near_o it_o on_o soil_n which_o cover_v freestone_n to_o which_o it_o may_v be_v add_v that_o a_o gentleman_n observe_v in_o hungary_n that_o walk_v over_o some_o ground_n which_o afford_v that_o noble_a oar_n call_v by_o the_o german_n rot-gulden_a ertz_n the_o air_n be_v very_o pleasant_a nor_o be_v the_o air_n much_o less_o pleasant_a on_o that_o ground_n which_o lie_v upon_o vein_n of_o cinnabar_fw-la yet_o over_o other_o sort_n of_o mine_n the_o air_n be_v very_o inoffensive_a nor_o be_v it_o improbable_a that_o subjacent_a fossiles_n shall_v influence_n the_o air_n since_o i_o have_v observe_v mineral_n earth_n twenty_n foot_n deep_a yield_v a_o volatile_a saline_a spirit_n like_o that_o of_o hartshorn_n and_o that_o several_a effluvia_fw-la may_n impregnate_n the_o air_n which_o be_v not_o to_o be_v discern_v by_o any_o of_o our_o sense_n appear_v from_o those_o magnetical_a effluvia_fw-la of_o the_o earth_n discover_v by_o the_o ingenious_a gilbert_n and_o other_o which_o do_v not_o only_a steam_n through_o the_o air_n but_o as_o i_o have_v observe_v act_n upon_o body_n in_o a_o instant_a which_o be_v contain_v in_o glass_n hermetical_o seal_v but_o though_o from_o hence_o it_o may_v appear_v that_o the_o salubrity_n of_o the_o air_n may_v be_v improve_v by_o the_o effluvia_fw-la of_o some_o mineral_n yet_o it_o be_v beyond_o doubt_n that_o in_o general_n they_o render_v the_o air_n insalubrious_a since_o there_o be_v a_o great_a many_o more_o that_o emit_v bad_a than_o good_a one_o for_o beside_o that_o the_o air_n have_v be_v observe_v in_o hungary_n to_o be_v very_o offensive_a and_o prejudicial_a to_o respiration_n that_o in_o the_o neopolitan_a grotta_n de_fw-fr cani_fw-la sudden_o deprive_v dog_n both_o of_o sense_n and_o motion_n to_o which_o may_v be_v add_v the_o averni_fw-la in_o hungary_n which_o sudden_o kill_v those_o that_o draw_v in_o the_o air_n infect_v with_o they_o beside_o which_o there_o be_v a_o great_a many_o noxious_a effluvia_fw-la which_o rise_v from_o marchasitical_a mineral_n which_o we_o take_v little_a notice_n of_o and_o in_o place_n which_o we_o little_o suspect_v they_o to_o be_v in_o nevertheless_o they_o infect_v the_o air_n and_o render_v it_o corrosive_n by_o emit_v that_o ill_a condition_a sulphur_n which_o they_o so_o much_o abound_v with_o that_o a_o pound_n distil_v in_o a_o earthen_a vessel_n with_o a_o good_a fire_n beside_o a_o inflammable_a sulphur_n which_o be_v condense_v into_o thin_a film_n on_o the_o side_n of_o the_o receiver_n yield_v a_o strong_a acid_n not_o much_o unlike_a gas_n sulphuris_fw-la which_o be_v corrosive_a enough_o to_o dissolve_v coral_n in_o the_o cold._n and_o that_o there_o be_v other_o marchasitical_a or_o vitriolate_a matter_n in_o england_n beside_o those_o stone_n from_o which_o the_o great_a part_n of_o vitriol_n be_v obtain_v i_o myself_o be_o a_o witness_n who_o have_v obtain_v a_o vitriol_n from_o a_o vein_n of_o metalline_a oar_n consist_v of_o a_o black_a heavy_a stuff_n without_o any_o troublesome_a or_o artificial_a preparation_n proposition_n ii_o it_o be_v probable_a 2._o prop._n 2._o that_o in_o divers_a place_n some_o endemical_a disease_n do_v chief_o or_o partly_o depend_v on_o subterraneal_a steam_n under_o the_o title_n of_o endemick_a disease_n i_o not_o only_o comprise_v those_o that_o be_v sole_o peculiar_a to_o some_o place_n as_o the_o plica_fw-la polonica_fw-la to_o poland_n and_o the_o disease_n in_o france_n call_v la_o colique_a de_fw-fr poictou_n but_o those_o that_o chief_o appear_v in_o particular_a country_n as_o ague_n in_o kent_n and_o essex_n hundred_o consumption_n in_o england_n and_o flux_n in_o ireland_n but_o before_o i_o proceed_v further_o under_o this_o topick_n it_o be_v requisite_a i_o shall_v first_o advertise_v that_o i_o deny_v not_o but_o that_o a_o great_a many_o of_o such_o distemper_n may_v depend_v in_o a_o great_a measure_n on_o excessive_a heat_n or_o cold_a or_o some_o other_o manifest_a quality_n of_o the_o air_n as_o also_o bad_a diet_n or_o intemperance_n but_o the_o reason_n why_o i_o think_v they_o general_o in_o a_o great_a measure_n likewise_o arise_v from_o some_o noxious_a and_o contagious_a subterraneal_a effluvia_fw-la be_v the_o follow_v 1._o because_o frequent_o the_o cause_n be_v not_o manifest_a and_o 2._o contagious_a effluvia_fw-la may_v be_v emit_v 3._o a_o large_a tract_n of_o land_n may_v abound_v with_o the_o same_o kind_n of_o mineral_n and_o another_o piece_n of_o land_n with_o another_o 4._o as_o the_o effluvia_fw-la be_v saline_n sulphureous_a antimonial_a arsenical_a or_o of_o another_o nature_n they_o may_v have_v different_a effect_n so_o in_o hungary_n some_o cause_n a_o difficulty_n of_o breathe_v but_o the_o effluvia_fw-la of_o the_o earth_n do_v not_o only_o affect_v the_o body_n by_o the_o mediation_n of_o respiration_n but_o be_v contiguous_a to_o the_o skin_n get_v in_o at_o the_o pore_n of_o the_o body_n and_o have_v sensible_a effect_n on_o the_o internal_a part_n and_o that_o the_o pore_n of_o the_o body_n be_v capable_a of_o receive_v very_o subtle_a effluvia_fw-la may_v be_v evince_v by_o several_a instance_n but_o it_o may_v suffice_v to_o intimate_v that_o i_o have_v so_o prepare_v a_o mineral_n substance_n that_o it_o will_v have_v very_o sensible_a effect_n on_o substance_n contain_v in_o the_o bladder_n of_o dead_a animal_n when_o it_o have_v no_o other_o way_n to_o get_v to_o those_o substance_n than_o through_o the_o pore_n of_o the_o bladder_n which_o be_v not_o near_o so_o perspirable_a as_o other_o part_n of_o the_o body_n not_o constitute_v to_o hold_v so_o subtle_a and_o penetrate_a a_o liquor_n as_o urine_n nor_o need_v it_o be_v a_o less_o wonder_n how_o these_o subterraneal_a effluvia_fw-la shall_v have_v so_o sudden_a effect_n on_o human_a body_n and_o in_o so_o little_a time_n since_o we_o see_v in_o moist_a wether_n how_o sudden_o lute-string_n be_v break_v and_o rope_n shorten_v by_o the_o insinuation_n of_o moist_a particle_n into_o their_o pore_n and_o though_o those_o effluvia_fw-la be_v not_o so_o plentiful_o disperse_v in_o the_o air_n as_o to_o enter_v the_o pore_n in_o such_o swarm_n yet_o the_o mass_n of_o humour_n may_v in_o time_n be_v sufficient_o impregnate_v with_o those_o noxious_a vapour_n to_o enable_v they_o to_o produce_v their_o effect_n when_o suck_v into_o the_o capillary_a vessel_n they_o gradual_o deprave_v the_o mass_n of_o blood_n and_o that_o effluvia_fw-la from_o without_o may_v have_v considerable_a effect_n on_o the_o mass_n of_o blood_n appear_v from_o appensa_fw-la and_o periapta_fw-la as_o also_o the_o effect_n of_o mercurial_a plaster_n and_o girdle_n and_o the_o effluvia_fw-la of_o a_o loadstone_n which_o cause_v a_o friend_n of_o i_o to_o be_v trouble_v with_o fit_n of_o the_o colic_n a_o argument_n that_o mineral_n effluvia_fw-la may_v cause_v particular_a disease_n to_o which_o we_o may_v add_v that_o arsenical_a appensa_fw-la extol_v by_o some_o in_o the_o plague_n have_v produce_v the_o effect_n of_o
except_o their_o peculiar_a texture_n will_v render_v they_o more_o capable_a of_o be_v work_v on_o by_o the_o ray_n of_o light_n than_o other_o body_n otherwise_o soft_a than_o they_o but_o whatever_o be_v the_o cause_n why_o the_o beam_n of_o light_n be_v very_o spare_o reflect_v from_o opacous_a body_n that_o that_o be_v the_o reason_n of_o blackness_n will_v be_v render_v probable_a if_o we_o take_v notice_n that_o if_o a_o black_a substance_n be_v hold_v partly_o in_o the_o sunshine_n and_o partly_o out_o that_o part_n will_v appear_v black_a which_o be_v least_o shine_v upon_o and_o if_o the_o rough_a surface_n of_o a_o black_a marble_n be_v well_o polish_v and_o bring_v to_o the_o form_n of_o a_o concave_a speculum_fw-la it_o will_v represent_v the_o image_n of_o the_o sun_n without_o dazzle_v the_o eye_n and_o will_v not_o in_o a_o long_a time_n set_v wood_n on_o fire_n though_o a_o less_o speculum_fw-la of_o matter_n of_o a_o more_o reflect_a nature_n will_v cause_v it_o to_o flame_n in_o a_o trice_n and_o to_o this_o i_o shall_v add_v that_o have_v set_v a_o white_a and_o a_o black_a marble_n mortar_n in_o the_o sun_n the_o black_a one_o collect_v the_o ray_n of_o the_o sun_n so_o as_o to_o form_v a_o focus_n much_o more_o conspicuous_a and_o hot_a than_o the_o other_o by_o which_o they_o be_v more_o disperse_v and_o reflect_v a_o glare_a light_n and_o the_o beam_n of_o a_o candle_n be_v cast_v upon_o two_o piece_n of_o marble_n through_o a_o round_a hole_n half_o a_o inch_n diameter_n the_o circle_n of_o light_n on_o the_o black_a one_o though_o much_o less_o luminous_a be_v better_o define_v and_o for_o a_o further_a confirmation_n of_o our_o hypothesis_n i_o shall_v add_v that_o when_o the_o ray_n of_o light_n fall_v on_o the_o holes_n in_o linen_n cloth_n or_o the_o mouth_n of_o a_o well_o those_o part_n be_v much_o dark_a the_o beam_n of_o light_n be_v not_o reflect_v back_o upon_o the_o eye_n and_o even_o black_a velvet_n be_v stroke_v up_o and_o down_o seem_v much_o black_a one_o way_n than_o the_o other_o the_o silken_a pile_n when_o incline_v reflect_v a_o great_a number_n of_o ray_n to_o the_o eye_n than_o the_o top_n of_o they_o be_v able_a to_o do_v which_o make_v but_o a_o small_a part_n of_o the_o superficies_n and_o i_o have_v observe_v that_o a_o cartload_n of_o carrot_n appear_v much_o more_o dark_a when_o the_o end_n of_o they_o be_v towards_o i_o than_o when_o a_o great_a number_n of_o ray_n be_v reflect_v to_o the_o eye_n by_o the_o side_n of_o they_o and_o in_o a_o dark_a room_n it_o be_v observe_v that_o if_o the_o light_n fall_v upon_o a_o black_a cloth_n the_o reflection_n from_o it_o be_v not_o near_o so_o sensible_a as_o if_o a_o white_a one_o be_v employ_v and_o i_o have_v observe_v that_o a_o piece_n of_o tile_n be_v partly_o colour_v black_a and_o partly_o white_a the_o red_a be_v much_o hot_a than_o the_o white_a though_o not_o so_o hot_a as_o the_o black_a part_n and_o it_o have_v be_v observe_v in_o italy_n that_o black_a marble_n expose_v to_o the_o sun_n be_v much_o hot_a than_o white_a one_o though_o it_o be_v observe_v that_o the_o black_a marble_n be_v much_o more_o solid_a than_o white_a and_o it_o be_v further_o observe_v that_o room_n hang_v with_o black_a be_v much_o warm_a than_o other_o so_o that_o a_o lady_n who_o be_v of_o a_o tender_a constitution_n be_v use_v to_o complain_v that_o she_o be_v apt_a to_o take_v cold_a after_o she_o have_v visit_v person_n who_o room_n where_o hang_v with_o black_n and_o i_o be_o tell_v that_o in_o hot_a country_n egg_n colour_v black_a and_o expose_v to_o the_o sun_n will_v be_v roast_v by_o it_o and_o i_o have_v observe_v they_o in_o england_n to_o acquire_v a_o considerable_a degree_n of_o heat_n by_o be_v expose_v to_o the_o sun_n in_o the_o summertime_n blacken_v over_o and_o not_o only_o the_o blind_a dutchman_n but_o as_o bartholinus_n say_v a_o blind_a earl_n of_o mansfield_n can_v distinguish_v white_a from_o black_a by_o the_o roughness_n of_o the_o latter_a and_o for_o these_o reason_n i_o be_o the_o rather_o incline_v to_o believe_v the_o doctrine_n propose_v leave_v it_o to_o be_v determine_v by_o experience_n whether_o the_o beam_n of_o light_n be_v reflect_v from_o opacous_a body_n and_o so_o different_o modify_v before_o they_o reach_v the_o eye_n or_o whether_o from_o white_a body_n they_o be_v not_o move_v more_o brisk_o chap._n vi_o experiment_n in_o consort_n concern_v whitness_n and_o blackness_n experiment_n i._n blackness_n several_a experiment_n concern_v whitness_n &_o blackness_n to_o show_v that_o the_o colour_n of_o two_o diaphanous_a liquor_n may_v be_v destroy_v by_o a_o change_n of_o texture_n satiate_v warm_a water_n with_o sublimate_n and_o have_v filter_v it_o through_o cap-paper_n to_o render_v it_o clear_a and_o limpid_a if_o a_o few_o drop_n of_o spirit_n of_o urine_n be_v drop_v into_o two_o spoonsful_a of_o it_o the_o mixture_n will_v immediate_o become_v white_a yet_o by_o a_o addition_n of_o aqua_fw-la fortis_fw-la it_o will_v again_o become_v transparent_a and_o will_v become_v white_a again_o with_o spirit_n of_o urine_n and_o the_o like_a have_v succeed_v in_o other_o experiment_n as_o well_o as_o of_o these_o experiment_n ii_o if_o a_o solution_n of_o vitriol_n be_v shake_v with_o a_o infusion_n of_o gall_n dilute_v with_o water_n it_o will_v turn_v it_o black_a but_o by_o a_o addition_n of_o a_o few_o drop_n of_o oil_n of_o vitriol_n it_o will_v present_o lay_v down_o its_o dark_a colour_n and_o become_v transparent_a but_o upon_o a_o addition_n of_o salt_n of_o tartar_n dissolve_v it_o will_v again_o acquire_v a_o blackness_n and_o though_o this_o ink_n be_v pale_a yet_o when_o dry_a it_o be_v very_a black_n the_o like_a succeed_v with_o common_a ink_n but_o not_o so_o easy_o the_o operation_n of_o the_o salt_n be_v hinder_v by_o the_o gum._n and_o here_o i_o shall_v take_v notice_n that_o though_o it_o be_v general_o allow_v that_o alkalizate_a salt_n will_v not_o precipitate_v body_n except_o first_o dissolve_v in_o some_o acid_n menstruum_fw-la yet_o i_o have_v try_v that_o a_o lixivium_n of_o pot-ash_n be_v pour_v upon_o decoction_n of_o vegetable_n will_v precipitate_v a_o curdle_a matter_n which_o will_v be_v leave_v behind_o in_o the_o filtre_n and_o in_o make_v the_o first_o ink_n several_a particle_n of_o black_a matter_n will_v be_v separate_v by_o a_o filtre_n and_o when_o the_o ink_n be_v make_v clear_a again_o by_o the_o oil_n of_o vitriol_n the_o salt_n of_o tarter_n seem_v to_o precipitate_v and_o to_o unite_v those_o particle_n of_o matter_n which_o be_v dissolve_v by_o the_o corrosive_a oil_n and_o to_o show_v that_o gall_n be_v not_o so_o requisite_a to_o the_o make_n of_o ink_n as_o they_o be_v general_o suppose_v i_o add_v a_o few_o drop_n of_o a_o solution_n of_o vitriol_n to_o a_o decoction_n of_o rose_n leave_v upon_o which_o it_o turn_v black_a and_o change_v that_o colour_n for_o a_o deep_a red_a when_o aqua_fw-la fortis_fw-la be_v add_v to_o it_o which_o be_v reduce_v to_o a_o black_a again_o by_o spirit_n of_o urine_n and_o though_o upon_o a_o mixture_n of_o liquor_n mention_v in_o the_o second_o chapter_n of_o this_o history_n of_o colour_n a_o black_a colour_n immediate_o emerge_n yet_o both_o the_o infusion_n of_o orpiment_n and_o a_o solution_n of_o minium_n be_v before_o they_o be_v mix_v limpid_a and_o colourse_n experiment_n iii_o the_o caput_fw-la mortuum_n of_o white_a hartshorn_n distil_v in_o a_o retort_n will_v be_v black_a which_o that_o it_o depend_v on_o the_o change_n of_o its_o texture_n only_o be_v evident_a since_o the_o same_o happen_v if_o it_o be_v distil_v in_o glass_n vessel_n yet_o by_o calcination_n in_o open_a vessel_n it_o will_v regain_v its_o pristine_a whiteness_n ivory_n burn_v yield_v a_o curious_a black_a and_o so_o do_v the_o burn_v caput_fw-la mortuum_n of_o tartar_n but_o if_o it_o be_v thorough_o calcine_v it_o will_v be_v white_a so_o white_a wood_n as_o hazel_n will_v yield_v a_o black_a charcoal_n and_o whitish_a ash_n and_o even_o animal_n substance_n grow_v black_a by_o be_v burn_v and_o white_a when_o perfect_o calcine_v experiment_n iu._n though_o it_o be_v hold_v as_o a_o maxim_n by_o some_o philosopher_n and_o most_o chemist_n viz._n adusta_fw-la nigra_fw-la sed_fw-la perusta_fw-mi alba_fw-la yet_o i_o have_v try_v that_o alabaster_n burn_v yield_v a_o yellow_a and_o lead_v calcine_v form_n a_o red_a minium_n which_o urge_v further_o by_o the_o fire_n turn_v to_o a_o glass_n dark_a than_o minium_n so_o likewise_o white_a calx_fw-la of_o antimony_n yield_v a_o glass_n of_o a_o red_a colour_n deep_a than_o the_o calx_fw-la of_o burn_a antimony_n and_o though_o common_a glass_n of_o antimony_n adulterate_v