it_o to_o free_v the_o pure_o nitrous_a from_o the_o other_o saline_a particle_n i_o be_o prone_a to_o suspect_v that_o in_o very_a many_o place_n especial_o maritime_a one_o the_o effluvia_fw-la of_o common_a salt_n do_v at_o least_o as_o plentiful_o as_o those_o of_o saltpetre_n abound_v in_o or_o impregnate_n the_o air_n which_o conjecture_n may_v be_v favour_v by_o divers_a thing_n if_o i_o have_v leisure_n to_o insist_v on_o they_o that_o in_o some_o place_n that_o abound_v with_o marchasite_n there_o be_v a_o kind_n of_o fret_v vitriolate_a salt_n copious_o disperse_v through_o the_o air_n i_o have_v be_v incline_v to_o think_v partly_o by_o other_o inducement_n and_o partly_o by_o the_o answer_v make_v i_o by_o a_o very_a observe_a man_n who_o live_v in_o a_o place_n that_o i_o remember_v i_o visit_v where_o be_v force_v to_o reside_v a_o good_a while_n he_o find_v the_o hang_n of_o his_o chamber_n and_o the_o curtain_n of_o his_o bed_n rot_v by_o the_o vitriolate_a steam_n expire_v by_o the_o soil_n who_o effluvia_fw-la have_v also_o very_o manifest_a and_o unwelcome_a effect_n on_o divers_a other_o thing_n that_o be_v keep_v near_o that_o place_n though_o on_o the_o opposite_a side_n of_o the_o river_n in_o a_o town_n that_o be_v not_o half_a a_o mile_n distant_a from_o this_o place_n neither_o i_o at_o my_o be_v there_o hear_v any_o such_o thing_n complain_v of_o nor_o the_o relator_n who_o have_v often_o occasion_n to_o repair_v thither_o observe_v any_o such_o mischievous_a effect_n the_o soil_n of_o this_o latter_a place_n be_v chalky_a whereas_o the_o other_o above_o mention_v be_v vitriolate_v insomuch_o that_o he_o observe_v that_o when_o the_o moist_a and_o blackish_a mould_n have_v be_v beat_v upon_o by_o the_o sun_n that_o here_o and_o there_o the_o superficial_a part_n will_v be_v as_o it_o be_v besprinkle_v with_o a_o somewhat_o whitish_a saline_a efflorescence_n beside_o the_o hitherto-mentioned_a kind_n of_o salt_n it_o seem_v not_o improbable_a to_o i_o that_o the_o air_n especial_o about_o great_a town_n and_o some_o other_o particular_a place_n may_v be_v impregnate_v with_o volatile_a salt_n that_o be_v of_o a_o nature_n contrary_n to_o acid_n for_o that_o there_o may_v be_v place_n in_o the_o earth_n even_o at_o a_o good_a depth_n under_o ground_n that_o lodge_v such_o salt_n i_o have_v be_v induce_v to_o think_v by_o the_o experience_n of_o a_o acquaintance_n of_o i_o who_o hope_v to_o find_v in_o the_o salt_n of_o what_o he_o suppose_v to_o be_v virgin-earth_n the_o true_a receptacle_n of_o a_o universal_a spirit_n from_o which_o he_o promise_v himself_o great_a and_o profitable_a matter_n cause_v to_o be_v dug_n up_o a_o great_a deal_n of_o a_o certain_a clay_n in_o a_o place_n abound_v with_o mineral_n and_o obtain_v thence_o by_o mere_a distillation_n no_o inconsiderable_a quantity_n of_o spirit_n and_o salt_n which_o in_o divers_a quality_n as_o smell_v taste_v etc._n etc._n i_o judge_v to_o be_v near_o of_o kin_n to_o the_o spirit_n of_o urine_n or_o hartshorn_n and_o yet_o this_o earth_n be_v dug_n up_o at_o the_o depth_n of_o many_o foot_n not_o to_o say_v yard_n beneath_o the_o surface_n of_o the_o ground_n as_o a_o ingenious_a potter_n from_o who_o the_o chemist_n have_v the_o clay_n assure_v i_o upon_o the_o place_n itself_o which_o i_o once_o visit_v to_o see_v some_o other_o choice_a mineral_n that_o ennoble_v that_o soil_n whence_o i_o will_v have_v get_v a_o quantity_n of_o the_o abovementioned_a day_n but_o that_o it_o be_v then_o the_o midst_n of_o winter_n the_o rain_n have_v as_o the_o workman_n speak_v drown_v 〈◊〉_d pit_n in_o great_a city_n and_o also_o town_n where_o much_o wood_n be_v burn_v it_o be_v probable_a that_o numerous_a particle_n of_o volatile_a salt_n may_v be_v disperse_v through_o the_o neighbour_a air._n for_o as_o i_o have_v elsewhere_o show_v the_o soot_n of_o burn_v wood_n which_o be_v but_o that_o small_a part_n of_o the_o smoke_n which_o chance_v in_o its_o passage_n upward_o to_o stick_v to_o the_o chimney_n do_v very_o much_o abound_v in_o a_o volatile_a saline_a spirit_n which_o by_o many_o trial_n be_v find_v to_o have_v so_o much_o affinity_n to_o that_o of_o urine_n and_o of_o hartshorn_n as_o not_o to_o be_v easy_o but_o by_o the_o smell_v distinguish_v from_o it_o beside_o in_o several_a place_n the_o putrefaction_n of_o substance_n that_o once_o be_v part_n of_o animal_n body_n may_v furnish_v the_o air_n with_o volatile_a salt_n as_o i_o have_v elsewhere_o mention_v that_o i_o find_v that_o urine_n without_o distillation_n will_v by_o bare_a putrefaction_n afford_v saline_a and_o spirituous_a part_n that_o whilst_o they_o yet_o swim_v in_o the_o copious_a phlegm_n that_o make_v up_o the_o body_n of_o the_o liquor_n will_v manifest_o discover_v themselves_o to_o be_v volatile_a not_o only_o by_o their_o smell_n but_o by_o their_o hiss_v with_o acid_a spirit_n and_o by_o their_o dissolve_v some_o body_n and_o precipitate_v other_o according_a to_o the_o manner_n of_o volatile_a sulphureous_a salt_n as_o those_o that_o abound_v in_o spirit_n of_o hartshorn_n blood_n etc._n etc._n and_o i_o be_o apt_a to_o think_v that_o it_o be_v not_o only_a in_o the_o part_n of_o animal_n but_o also_o in_o those_o of_o many_o vegetable_n that_o putrefaction_n may_v either_o extricate_v or_o produce_v volatile_a salt_n and_o i_o remember_v i_o have_v observe_v in_o some_o succulent_a vegetable_n that_o chance_v to_o lie_v in_o a_o heap_n together_o in_o a_o convenient_a season_n of_o the_o year_n to_o make_v they_o rot_v i_o observe_v i_o say_v when_o the_o putrefaction_n be_v come_v to_o a_o certain_a point_n that_o the_o stink_n do_v so_o resemble_v that_o of_o carrion_n that_o it_o be_v not_o easy_a for_o i_o to_o believe_v it_o come_v from_o cadaverous_a plant_n not_o animal_n and_o that_o it_o be_v not_o impossible_a for_o a_o vegetable_a to_o afford_v without_o the_o help_n of_o a_o additament_n a_o volatile_a salt_n even_o in_o forma_fw-la sicca_fw-la may_v be_v gather_v from_o what_o i_o elsewhere_o relate_v of_o my_o have_v distil_v such_o a_o salt_n from_o a_o certain_a spirituous_a seed_n though_o i_o free_o confess_v i_o never_o obtain_v any_o without_o previous_a incineration_n from_o above_o two_o or_o three_o vegetable_n but_o of_o this_o enough_o in_o this_o place_n i_o shall_v now_o add_v that_o beside_o the_o more_o simple_a salt_n hitherto_o enumerate_v it_o be_v not_o unlikely_a that_o in_o some_o place_n the_o air_n may_v sometime_o contain_v compound_v salt_n for_o i_o have_v elsewhere_o show_v that_o some_o sort_n of_o saline_a spirit_n meet_v one_o another_o in_o the_o air_n may_v there_o convene_v and_o i_o elsewhere_o teach_v how_o to_o order_v a_o couple_n of_o liquor_n so_o that_o one_o will_v never_o of_o itself_o afford_v any_o thing_n in_o a_o dry_a form_n and_o yet_o the_o spirituous_a effluvia_fw-la of_o this_o liquor_n meet_v with_o those_o of_o the_o other_o will_v exhibit_v a_o volatile_a and_o saline_a body_n in_o a_o dry_a form_n though_o the_o liquor_n themselves_o be_v mingle_v will_v not_o afford_v any_o such_o substance_n what_o i_o have_v elsewhere_o deliver_v concern_v subterraneal_a steam_n may_v make_v it_o probable_a that_o at_o least_o now_o and_o then_o and_o in_o some_o place_n there_o may_v be_v send_v up_o from_o under_o ground_n into_o the_o air_n among_o other_o effluvia_fw-la store_n of_o saline_a one_o which_o need_v not_o be_v suppose_v all_o of_o they_o to_o be_v of_o a_o uncompounded_a nature_n with_o which_o that_o agree_v very_o well_o that_o be_v relate_v to_o i_o by_o a_o very_a intelligent_a acquaintance_n of_o i_o that_o live_v long_o in_o part_n of_o america_n where_o there_o be_v a_o vulcan_n which_o he_o and_o some_o other_o have_v the_o curiosity_n to_o visit_v tell_v i_o that_o before_o they_o come_v any_o thing_n near_o the_o fire_n or_o be_v offend_v by_o the_o heat_n not_o only_o the_o skin_n of_o his_o face_n be_v almost_o corrode_v by_o the_o sharpness_n of_o the_o exhalation_n but_o the_o colour_n of_o his_o hair_n be_v alter_v by_o it_o which_o keep_v he_o from_o prosecute_a his_o intend_a discovery_n it_o be_v a_o know_a thing_n and_o i_o have_v receive_v information_n of_o it_o from_o more_o than_o one_o eye-witness_n that_o about_o mount_n vesuvius_n the_o ascend_a exhalation_n that_o issue_n out_o at_o some_o of_o the_o holes_n be_v of_o so_o saline_a and_o sulphureous_a a_o nature_n that_o part_n of_o they_o stick_v about_o the_o orifice_n of_o those_o vent_v in_o the_o form_n of_o flower_n of_o brimstone_n of_o which_o a_o learned_a acquaintance_n of_o i_o bring_v away_o some_o quantity_n and_o i_o have_v have_v bring_v i_o from_o some_o of_o those_o vulcan_n a_o stone_n who_o cavety_n abound_v with_o a_o white_a salt_n which_o by_o fit_a
divers_a of_o they_o grant_v indeed_o that_o the_o atmosphere_n be_v not_o absolute_o pure_a but_o yet_o think_v that_o it_o differ_v but_o gradual_o from_o true_a and_o simple_a air_n as_o water_v a_o little_a move_v and_o trouble_v do_v from_o clear_a and_o settle_a water_n but_o for_o my_o part_n i_o confess_v i_o acquiesce_v not_o in_o either_o of_o those_o notion_n of_o the_o air._n for_o as_o i_o have_v elsewhere_o more_o full_o declare_v in_o a_o short_a discourse_n purposely_o treat_v of_o the_o substance_n of_o the_o air_n although_o i_o will_v not_o deny_v that_o there_o be_v a_o ethereal_a matter_n more_o subtle_a than_o the_o common_a air_n which_o ether_n i_o take_v to_o be_v diffuse_v through_o all_o the_o interstellar_n part_n of_o the_o universe_n know_v to_o we_o reach_v to_o and_o surround_v all_o its_o great_a globles_n yet_o speak_v of_o the_o air_n which_o we_o man_n live_v and_o breath_n in_o i_o take_v our_o atmosphere_n to_o consist_v not_o only_o of_o the_o pure_a ether_n but_o in_o great_a part_n of_o a_o vast_a multitude_n of_o effluvia_fw-la emit_v by_o the_o terraqueous_a globe_n and_o the_o various_a body_n it_o be_v make_v up_o of_o and_o perhaps_o in_o some_o part_n also_o of_o substantial_a emanation_n from_o the_o celestial_a body_n and_o that_o that_o whereby_o the_o atmosphere_n differ_v from_o such_o pure_a air_n as_o the_o school_n tell_v we_o of_o be_v not_o a_o bare_a and_o indeterminate_a feculency_n but_o a_o confuse_a aggregate_v of_o several_a distinct_a and_o perhaps_o disagree_v kind_n of_o effluvia_fw-la and_o among_o those_o one_o of_o the_o principal_a sort_n i_o take_v to_o be_v the_o saline_n one_o which_o rove_v up_o and_o down_o among_o other_o in_o that_o vast_a ocean_n of_o effluxion_n we_o call_v the_o atmosphere_n wherein_o yet_o i_o do_v not_o think_v there_o be_v to_o be_v meet_v with_o either_o all_o sort_n of_o they_o every_o where_o or_o perhaps_o any_o sort_n in_o like_a plenty_n in_o all_o place_n and_o at_o all_o season_n to_o show_v that_o the_o air_n be_v not_o unfurnished_v with_o part_n of_o a_o saline_a nature_n i_o may_v allege_v some_o consideration_n that_o seem_v to_o make_v it_o probable_a à _fw-la priori_fw-la as_o they_o speak_v that_o there_o be_v always_o some_o such_o corpuscle_n emit_v into_o the_o air._n but_o instead_o of_o insist_v on_o such_o particular_n because_o they_o may_v seem_v too_o little_a of_o a_o historical_a nature_n to_o be_v fit_a for_o this_o paper_n i_o shall_v content_v myself_o to_o take_v notice_n in_o the_o general_n that_o almost_o if_o not_o more_o than_o almost_o all_o the_o argument_n i_o have_v employ_v to_o prove_v the_o copious_a ascension_n of_o subterraneal_a steam_n into_o the_o air_n may_v be_v apply_v to_o our_o present_a purpose_n since_o among_o the_o effluviate_a substance_n of_o the_o terraqueous_a globe_n there_o be_v as_o i_o have_v declare_v in_o another_o paper_n huge_a quantity_n of_o common_a or_o marine_a salt_n beside_o nitrous_a aluminous_a vitriolate_a and_o perhaps_o other_o kind_n of_o salt_n to_o which_o i_o shall_v add_v that_o the_o emission_n of_o subterraneal_a aporrheas_n or_o efflux_n be_v not_o the_o only_a mean_n whereby_o the_o air_n may_v be_v impregnate_v with_o saline_a particle_n since_o the_o exhalation_n and_o vapour_n produce_v by_o the_o action_n of_o the_o sunbeam_n upon_o the_o more_o superficial_a part_n of_o the_o earth_n and_o sea_n may_v supply_v the_o air_n with_o swarm_n of_o corpuscle_n as_o well_o of_o saline_n as_o of_o any_o other_o nature_n not_o to_o mention_v that_o the_o number_n of_o these_o may_v in_o divers_a place_n be_v much_o increase_v by_o those_o vulcan_n that_o have_v open_a vent_v to_o discharge_v their_o fume_n into_o the_o air_n by_o those_o numerous_a fire_n which_o burn_v in_o our_o chimney_n produce_v much_o saline_a smoke_n and_o by_o other_o way_n which_o i_o shall_v here_o forbear_v to_o discourse_v of_o for_o the_o reason_n late_o give_v for_o my_o decline_a argument_n draw_v à _fw-la priori_fw-la though_o some_o thing_n applicable_a to_o this_o purpose_n will_v in_o likelihood_n occur_v among_o the_o instance_n i_o be_o about_o to_o add_v to_o make_v it_o seem_v probable_a à _fw-la posteriori_fw-la or_o by_o some_o effect_n and_o phenomena_n that_o the_o air_n be_v impregnate_v with_o saline_a corpuscle_n that_o be_v none_o of_o its_o least_o active_a part_n and_o may_v have_v great_a interest_n in_o divers_a of_o its_o operation_n from_o what_o have_v be_v hitherto_o deliver_v to_o make_v it_o probable_a that_o there_o be_v a_o saline_a substance_n in_o the_o air_n i_o think_v fit_a to_o proceed_v to_o other_o inquiry_n the_o first_o whether_o the_o aerial_a salt_n be_v of_o differ_v kind_a and_o if_o so_o which_o they_o be_v and_o the_o second_o how_o it_o come_v by_o its_o saline_a substance_n but_o about_o such_o differ_a point_n i_o dare_v promise_v myself_o but_o little_a satisfaction_n and_o therefore_o shall_v not_o pretend_v to_o give_v you_o much_o and_o yet_o to_o say_v something_o to_o the_o first_o of_o the_o two_o inquiry_n i_o be_o prone_a to_o think_v that_o the_o saline_a particle_n of_o the_o atmosphere_n be_v not_o all_o of_o one_o sort_n but_o that_o there_o may_v be_v three_o or_o four_o differ_a kind_n of_o aerial_a salt_n i_o know_v that_o divers_a learned_a man_n some_o physician_n some_o chemist_n and_o some_o also_o philosopher_n speak_v much_o of_o a_o volatile_a nitre_n that_o abound_v in_o the_o air_n as_o if_o that_o be_v the_o only_a salt_n wherewith_o it_o be_v impregnate_v but_o though_o i_o agree_v with_o they_o in_o think_v that_o the_o air_n be_v in_o many_o place_n impregnate_v with_o corpuscle_n of_o a_o nitrous_a nature_n yet_o i_o confess_v i_o have_v not_o be_v hitherto_o convince_v of_o all_o that_o be_v wont_a to_o be_v deliver_v about_o the_o plenty_n and_o quality_n of_o the_o nitre_n in_o the_o air_n for_o i_o have_v not_o find_v that_o those_o that_o build_v so_o much_o upon_o this_o volatile_a nitre_n have_v make_v out_o by_o any_o competent_a experiment_n that_o there_o be_v such_o a_o volatile_a nitre_n abound_v in_o the_o air._n for_o have_v often_o deal_v with_o saltpetre_n in_o the_o fire_n i_o do_v not_o find_v it_o easy_a to_o be_v raise_v by_o a_o gentle_a heat_n and_o when_o by_o a_o strong_a fire_n we_o distil_v it_o in_o close_a vessel_n it_o be_v plain_a that_o what_o the_o chemist_n call_v spirit_n of_o nitre_n have_v quite_o differ_v property_n from_o crude_a nitre_n and_o from_o those_o that_o be_v ascribe_v to_o the_o volatile_a nitre_n of_o the_o air_n these_o spirit_n be_v so_o far_o from_o be_v refresh_v to_o the_o nature_n of_o animal_n that_o they_o be_v exceed_o corrosive_a and_o even_o when_o i_o cause_v earth_n to_o be_v dug_n up_o in_o a_o old_a pigeon-house_n because_o that_o be_v account_v the_o most_o nitrous_a sort_n of_o earth_n and_o distil_v it_o with_o moderate_a fire_n i_o do_v not_o find_v the_o volatile_a saline_a part_n that_o come_v over_o to_o be_v like_o that_o which_o these_o learned_a man_n conceive_v the_o air_n to_o be_v store_v with_o nor_o have_v i_o meet_v with_o among_o they_o any_o positive_a proof_n to_o evince_v the_o truth_n of_o their_o opinion_n which_o yet_o as_o i_o be_v say_v i_o be_o content_a to_o admit_v as_o a_o ingenious_a supposition_n till_o something_o be_v offer_v that_o shall_v prove_v it_o to_o be_v more_o which_o i_o think_v not_o impossible_a to_o happen_v at_o least_o as_o to_o some_o time_n and_o place_n but_o i_o be_o not_o yet_o sure_a that_o the_o exhalation_n that_o ascend_v from_o the_o subterraneal_a part_n and_o perhaps_o also_o the_o sunbeam_n themselves_o may_v volatilize_v many_o of_o the_o nitrous_a corpuscle_n they_o chance_v to_o act_v upon_o and_o elevate_v they_o into_o the_o air_n without_o analyze_a they_o or_o destroy_v their_o texture_n as_o our_o fire_n be_v wont_a to_o do_v but_o however_o i_o do_v not_o take_v the_o hitherto_o mention_v nitre_n to_o be_v the_o only_a salt_n that_o impregnate_v the_o air_n for_o when_o i_o consider_v how_o vast_a a_o portion_n of_o the_o terraqueous_a globe_n be_v cover_v with_o the_o salt_n sea_n and_o how_o vast_a quantity_n of_o fossil_a salt_n as_o well_o fine_a and_o clear_a as_o course_n be_v dug_n up_o in_o poland_n especial_o near_o cracovia_n in_o hungary_n transylvania_n and_o in_o divers_a other_o part_n of_o the_o earth_n when_o i_o consider_v too_o that_o we_o seldom_o find_v saltpetre_n in_o the_o earth_n but_o that_o there_o be_v sea-salt_n mix_v with_o it_o which_o put_v the_o salt-peter-man_n to_o a_o great_a deal_n of_o trouble_v to_o separate_v it_o and_o that_o even_o from_o saltpetre_n that_o pass_v for_o good_a i_o have_v trouble_v enough_o when_o i_o have_v the_o curiosity_n purposely_o to_o refine_v
ascend_v fret_a particle_n out_o of_o the_o liquor_n and_o that_o within_o less_o than_o a_o day_n the_o steam_n of_o the_o two_o abovementioned_a liquor_n have_v much_o darken_v the_o surface_n of_o the_o copper_n plate_n they_o meet_v with_o in_o their_o way_n the_o keep_v they_o a_o while_n in_o the_o air_n be_v not_o hard_a to_o know_v by_o the_o differ_a discoloration_n that_o appear_v which_o plate_n have_v be_v invade_v by_o the_o saline_a corpuscle_n and_o which_o by_o the_o nitrous_a which_o i_o do_v not_o at_o all_o wonder_n at_o because_o i_o have_v former_o find_v as_o i_o have_v elsewhere_o note_v that_o whereas_o spirit_n of_o nitre_n will_v make_v of_o copper_n a_o greenish_a blue_a solution_n spirit_n of_o salt_n will_v if_o due_o employ_v dissolve_v that_o metal_n into_o a_o grass-green_a liquor_n as_o the_o spirit_n of_o soot_n and_o that_o of_o urine_n will_v into_o a_o deep_a blue_n almost_o like_o ultramarine_n but_o as_o i_o say_v the_o want_n of_o time_n of_o which_o good_a store_n may_v be_v requisite_a for_o such_o trial_n keep_v i_o from_o prosecute_a my_o attempt_n to_o a_o issue_n notwithstanding_o which_o i_o look_v not_o upon_o the_o design_n as_o desperate_a not_o only_o because_o of_o the_o encouragement_n i_o have_v already_o mention_v to_o resume_v it_o but_o because_o i_o have_v observe_v piece_n of_o malleable_a copper_n bring_v i_o to_o examine_v out_o of_o a_o english_a mine_n which_o be_v yet_o conceal_v to_o be_v overcast_v here_o and_o there_o with_o a_o fair_a verdigrease_n which_o by_o circumstance_n i_o judge_v to_o have_v be_v produce_v not_o by_o gross_a liquor_n but_o by_o the_o air_n impregnate_v with_o steam_n fit_a to_o work_v on_o that_o metal_n and_o possible_o there_o may_v be_v other_o subterraneal_a body_n and_o even_o metalline_a one_o that_o by_o their_o degree_n of_o colour_n or_o peculiar_a kind_n of_o rust_n or_o stain_n that_o they_o will_v acquire_v in_o the_o air_n may_v help_v we_o to_o guess_v what_o substance_n and_o among_o other_o what_o salt_n the_o air_n of_o that_o place_n be_v impregnate_v with_o i_o have_v be_v in_o a_o great_a and_o stately_a house_n which_o be_v odd_o seat_v have_v this_o peculiar_a inconvenience_n upon_o the_o score_n of_o the_o steam_n that_o infest_a the_o air_n that_o those_o that_o dwell_v in_o it_o as_o one_o of_o the_o chief_a of_o themselves_o complain_v to_o i_o can_v not_o keep_v their_o silver_n plate_n of_o which_o they_o have_v great_a store_n from_o be_v blemish_v by_o odd_a discoloration_n or_o as_o they_o seem_v to_o think_v it_o rust_n though_o when_o it_o be_v not_o use_v they_o careful_o keep_v it_o in_o a_o place_n judge_v convenient_a for_o such_o a_o purpose_n and_o i_o have_v be_v inform_v by_o a_o observe_a man_n who_o live_v there_o some_o time_n that_o there_o be_v nothing_o more_o general_o know_v in_o amsterdam_n than_o that_o their_o silver_n plate_n there_o expose_v a_o little_a while_n to_o the_o common_a air_n tarnish_n immediate_o contract_v a_o dirty_a colour_n partake_v of_o yellow_a and_o black_a another_o instance_n or_o two_o though_o not_o afford_v by_o plate_n i_o can_v mention_v to_o the_o same_o purpose_n but_o i_o reserve_v they_o for_o another_o place_n my_o haste_n oblige_v i_o to_o pass_v on_o to_o the_o last_o of_o the_o three_o way_n i_o propose_v of_o investigate_a the_o difference_n of_o aerial_a salt_n the_o three_o way_n may_v be_v look_v upon_o if_o you_o please_v as_o a_o variation_n of_o the_o second_o but_o there_o be_v this_o difference_n betwixt_o they_o that_o here_o we_o make_v use_v of_o metalline_a body_n not_o crude_a but_o already_o prepare_v by_o some_o chemical_a operation_n so_o that_o be_v beforehand_o reduce_v to_o very_o small_a part_n by_o the_o intervention_n of_o saline_a substance_n the_o operation_n of_o the_o air_n upon_o they_o be_v wont_a to_o be_v much_o the_o soon_o perform_v in_o this_o three_o way_n than_o we_o employ_v such_o factititious_a mineral_n or_o other_o body_n as_o have_v for_o the_o most_o part_v a_o adventitious_a colour_n already_o will_v change_v that_o colour_n by_o be_v expose_v to_o the_o air._n for_o it_o seem_v not_o impossible_a but_o that_o by_o diligent_o observe_v what_o difference_n may_v be_v find_v in_o the_o discoloration_n produce_v in_o these_o substance_n by_o the_o differ_a kind_n of_o salt_n as_o nitrous_a salino-sulphureous_a etc._n etc._n that_o we_o have_v show_v may_v be_v meet_v with_o in_o the_o air_n some_o guess_n may_v be_v make_v in_o a_o short_a time_n of_o this_o or_o that_o salt_n which_o have_v the_o chief_a stroke_n in_o the_o production_n of_o the_o exhibit_v colour_n and_o i_o shall_v on_o this_o occasion_n mention_v two_o or_o three_o body_n without_o determine_v till_o i_o be_v better_o satisfy_v whether_o their_o change_n proceed_v only_o or_o chief_o from_o the_o salt_n of_o the_o air_n but_o i_o be_o content_a not_o to_o pretermit_v they_o because_o if_o they_o do_v not_o prove_v what_o i_o propose_v they_o will_v at_o least_o clear_a the_o meaning_n of_o it_o and_o may_v however_o help_v we_o to_o guess_v at_o the_o resemblance_n or_o difference_n of_o air_n in_o several_a place_n by_o the_o likeness_n or_o unlikeness_n of_o the_o produce_v change_n of_o colour_n whether_o these_o change_n proceed_v from_o saline_n or_o from_o any_o other_o substance_n intermingle_v with_o the_o air._n if_o we_o precipitate_v a_o strong_a solution_n of_o good_a silver_n ii_o make_v in_o aqua_fw-la fortis_fw-la with_o a_o competent_a quantity_n of_o spirit_n of_o sea-salt_n we_o shall_v have_v a_o powder_n which_o at_o first_o will_v be_v very_o white_a but_o if_o the_o liquor_n be_v not_o pour_v off_o this_o be_v expose_v for_o a_o good_a while_n to_o the_o air_n it_o will_v acquire_v on_o the_o surface_n a_o dark_a colour_n which_o perhaps_o a_o attentive_a eye_n will_v discern_v somewhat_o various_a as_o this_o or_o that_o kind_n of_o saltness_n happen_v to_o be_v predominant_a in_o the_o air._n we_o take_v a_o equal_a weight_n of_o good_a file_n of_o copper_n iii_o and_o powdered_a sal-armoniac_a which_o be_v well_o mix_v be_v put_v into_o a_o cover_a crucible_n and_o keep_v in_o a_o moderate_a fire_n over_o ignited_a coal_n till_o the_o sal-armoniac_a have_v either_o quite_o or_o almost_o do_v smoke_v then_o as_o much_o of_o the_o remain_a mass_n as_o can_v be_v part_v be_v take_v out_o and_o look_v of_o a_o dark_a colour_n but_o this_o mass_n be_v gross_o beat_v and_o expose_v for_o some_o time_n to_o the_o air_n look_v like_o a_o kind_n of_o verdigrease_n which_o be_v a_o substance_n who_o colour_n may_v be_v observe_v somewhat_o to_o vary_v according_a to_o the_o nature_n of_o the_o particular_a salt_n which_o by_o work_v on_o and_o imbody_v with_o the_o copper_n produce_v the_o pigment_n but_o a_o parcel_n of_o the_o same_o mass_n be_v before_o the_o air_n have_v time_n to_o work_v much_o upon_o it_o gross_o powder_v and_o hermetical_o seal_v in_o a_o glass_n egg_n to_o fence_v it_o from_o the_o air_n and_o leave_v in_o a_o south_n window_n do_v not_o appear_v discolour_v when_o the_o out_o side_n of_o the_o other_o parcel_n show_v like_o verdigrease_n which_o seem_v to_o argue_v the_o change_n of_o colour_n to_o have_v be_v make_v by_o the_o aerial_a salt_n if_o we_o suppose_v the_o moisture_n of_o the_o airto_o have_v have_v no_o interest_n in_o the_o change_n or_o to_o have_v concur_v to_o it_o but_o as_o a_o kind_n of_o vehicle_n assistant_n to_o the_o salt_n i_o also_o take_v spirit_n of_o the_o soot_n of_o wood_n and_o have_v iu._n pour_v a_o little_a of_o it_o on_o the_o file_n of_o copper_n my_o expectation_n be_v answer_v by_o my_o find_n that_o the_o liquor_n dissolve_v some_o part_n of_o the_o metal_n into_o a_o deep_a and_o lovely_a azure_a like_o ultramarine_n and_o that_o this_o solution_n be_v suffer_v to_o grow_v dry_a in_o a_o open_a glass_n by_o the_o the_o mere_a operation_n of_o the_o air_n the_o ceruleous_a colour_n very_o soon_o degenerate_v even_o before_o the_o matter_n be_v quite_o dry_a into_o a_o cyanious_a colour_n such_o as_o may_v be_v see_v in_o good_a turquoise_n and_o to_o manifest_v that_o this_o change_n proceed_v not_o from_o any_o peculiarity_n in_o the_o spirit_n of_o soot_n and_o that_o this_o spirit_n act_v as_o abound_v with_o a_o salino-sulphureous_a salt_n i_o shall_v add_v that_o i_o have_v the_o like_a success_n in_o a_o trial_n make_v with_o a_o urinous_a spirit_n draw_v from_o animal_n substance_n and_o put_v upon_o crude_a file_n of_o copper_n and_o in_o those_o trial_n i_o sometime_o observe_v the_o difference_n of_o colour_n that_o do_v not_o discourage_v i_o from_o hope_v that_o the_o prosecution_n of_o they_o may_v not_o be_v insignificant_a to_o my_o purpose_n i_o have_v not_o
soil_n and_o perhaps_o other_o circumstance_n so_o that_o sometime_o a_o candle_n will_v go_v out_o much_o soon_o and_o sometime_o it_o will_v continue_v burn_v though_o it_o be_v let_v down_o to_o the_o depth_n of_o eight_o ten_o or_o more_o fathom_n that_o when_o they_o come_v into_o close_a ground_n though_o their_o candle_n will_v burn_v at_o first_o yet_o after_o a_o while_n work_v more_o especial_o if_o the_o stone_n be_v full_a of_o mundick_n the_o dust_n raise_v by_o their_o work_v will_v make_v their_o candle_n go_v out_o so_o that_o they_o must_v leave_v work_v for_o a_o time_n except_o they_o will_v be_v at_o the_o charge_n of_o convey_v down_o air_n by_o pipe_n i_o mention_v this_o as_o different_a from_o other_o sort_n of_o damp_n n._n experiment_n touch_v the_o relation_n between_o flame_n air._n the_o burn_a of_o candle_n etc._n etc._n under_o a_o glass_n bell._n the_o burn_a of_o spirit_n of_o wine_n under_o a_o glass_n bell._n the_o burn_a of_o match_n touchwood_n sponck_n etc._n etc._n under_o a_o bell._n the_o keep_n of_o animal_n under_o the_o same_o instrument_n whilst_o the_o flame_n be_v burn_v the_o burn_a of_o body_n to_o ash_n in_o seal_a glass_n the_o do_v the_o like_a in_o exact_o close_v receiver_n the_o burn_a of_o cotton_n in_o a_o seal_a glass_n the_o burn_a of_o the_o mixture_n of_o flame_n under_o water_n in_o a_o e._n r._n the_o burn_a of_o spirit_n of_o wine_n and_o oil_n of_o turpentine_n in_o glass_n vessel_n with_o slender_a neck_n the_o experiment_n of_o burn_a gunpowder_n another_o of_o the_o pistol_n not_o fire_v in_o a_o e._n r._n the_o burn_a of_o a_o saline_a substance_n in_o a_o e._n r._n the_o burn_a of_o mixture_n of_o saltpetre_n in_o a_o e._n r._n title_n xxv_o of_o the_o air_n in_o reference_n to_o fermentation_n we_o take_v a_o small_a handful_n of_o raisin_n and_o have_v novemb_n put_v they_o into_o a_o bolt-head_n not_o large_a but_o half_o fill_v with_o water_n we_o draw_v out_o the_o air_n and_o then_o we_o remove_v the_o portable_a and_o exact_o close_v receiver_n and_o put_v it_o on_o the_o digestive_a furnace_n that_o the_o warmth_n of_o that_o place_n may_v promote_v the_o fermentation_n in_o spite_n of_o the_o unfavourableness_n of_o the_o season_n of_o the_o year_n after_o a_o while_n there_o appear_v sign_n of_o fermentation_n by_o the_o emerge_n of_o the_o raisin_n which_o swan_n for_o some_o day_n on_o the_o top_n of_o the_o water_n most_o of_o they_o beset_v with_o numerous_a bubble_n nor_o do_v above_o very_o few_o of_o they_o subside_o at_o last_o though_o after_o some_o day_n the_o bubble_n grow_v few_o and_o few_o and_o there_o appear_v a_o sediment_n at_o the_o bottom_n of_o the_o glass_n a_o fortnight_n after_o they_o be_v first_o seal_v up_o the_o upper_a part_n of_o the_o glass_n be_v accidental_o break_v whilst_o i_o stand_v by_o whereupon_o the_o external_a air_n rush_v in_o with_o some_o noise_n and_o i_o take_v the_o vessel_n in_o my_o hand_n perceive_v the_o surface_n of_o the_o liquor_n to_o be_v overspead_n with_o bubble_n almost_o like_o the_o forth_o of_o bottle-drink_a there_o seem_v to_o i_o to_o come_v out_o at_o the_o little_a orifice_n make_v where_o the_o apex_n be_v break_v off_o a_o visible_a fume_v which_o have_v a_o somewhat_o languid_a smell_n the_o liquor_n be_v high_o colour_v of_o the_o raisin_n and_o seem_v to_o have_v extract_v something_o from_o they_o that_o give_v it_o a_o better_a consistence_n than_o that_o of_o water_n title_n xxvi_o of_o the_o air_n as_o the_o receptacle_n of_o odour_n  _fw-fr title_n xxvii_o of_o the_o operation_n of_o the_o air_n on_o the_o odour_n of_o animal_n substance_n may_v 23._o we_o open_v a_o exhaust_a receiver_n wherein_o be_v pretty_a store_n of_o verjuice_n or_o green_a and_o sour_a grape_n and_o though_o they_o have_v lie_v there_o we_o be_v sure_a about_o three_o year_n and_o possible_o much_o long_o yet_o there_o appear_v no_o mouldiness_n at_o all_o upon_o any_o of_o they_o but_o the_o surface_v of_o the_o uppermost_a grain_n be_v somewhat_o discolour_v perhaps_o by_o a_o saline_n and_o confuse_o form_v efflorescence_n which_o have_v look_v upon_o through_o a_o glass_n and_o also_o taste_v i_o guess_v to_o be_v a_o kind_n of_o tartar_n the_o like_a liquor_n that_o the_o grain_n have_v afford_v have_v a_o acid_a taste_n and_o will_v in_o the_o cold_a corrode_v coral_n but_o the_o grain_n smell_v somewhat_o musty_a in_o all_o this_o time_n the_o verjuice_n have_v produce_v so_o little_a air_n that_o we_o can_v scarce_o take_v notice_n of_o it_o by_o the_o mercurial_a gage_n that_o have_v be_v shut_v up_o with_o it_o i_o inquire_v of_o my_o lord_n of_o sandwich_n and_o a_o couple_n of_o gentleman_n that_o accompany_v he_o whether_o it_o be_v true_a which_o be_v report_v of_o the_o purity_n of_o the_o air_n at_o madrid_n that_o though_o they_o have_v no_o house_n of_o office_n but_o every_o night_n throw_v out_o their_o excrement_n into_o the_o street_n yet_o by_o the_o morning_n there_o remain_v no_o more_o smell_n of_o they_o to_o which_o i_o be_v answer_v that_o it_o be_v true_a the_o excrement_n be_v so_o dispose_v of_o but_o that_o madrid_n be_v the_o stink_a town_n they_o ever_o come_v into_o yet_o that_o it_o be_v difficult_a to_o discern_v in_o the_o morning_n any_o peculiar_a smell_n of_o what_o have_v be_v cast_v into_o the_o street_n by_o night_n but_o they_o joint_o affirm_v that_o the_o place_n where_o the_o ambassador_n numerous_a family_n resort_v to_o make_v water_n in_o do_v not_o smell_v of_o piss_n and_o that_o they_o often_o observe_v the_o dog_n and_o cat_n that_o lay_v dead_a in_o the_o street_n be_v deprive_v of_o stench_n and_o his_o lordship_n suppose_v that_o the_o stench_n of_o a_o dead_a mule_n will_v in_o few_o hour_n vanish_v title_n xxviii_o of_o the_o operation_n of_o the_o air_n on_o the_o odour_n of_o vegetable_a substance_n may_v 16._o at_o the_o same_o time_n we_o open_v another_o small_a receiver_n wherein_o above_o three_o year_n before_o some_o large_a piece_n of_o orange_n have_v be_v include_v the_o rind_n of_o these_o be_v much_o discolour_a their_o surface_n be_v almost_o black_a they_o have_v scarce_o afford_v any_o liquor_n and_o yet_o we_o can_v not_o perceive_v the_o least_o mould_n in_o any_o of_o they_o nor_o have_v they_o a_o putrid_a smell_n title_n xxix_o of_o the_o operation_n of_o the_o air_n on_o the_o odour_n of_o mineral_n substance_n  _fw-fr title_n xxx_o of_o the_o operation_n of_o the_o air_n on_o the_o taste_n of_o animal_n substance_n he_o answer_v i_o that_o they_o can_v very_o well_o preserve_v meat_n as_o beef_n without_o salt_v it_o as_o long_o as_o the_o frost_n last_v that_o be_v during_o the_o whole_a winter_n but_o when_o it_o be_v once_o thorough_o freeze_v they_o can_v not_o dress_v it_o so_o as_o to_o make_v it_o relish_v like_o good_a meat_n mr._n nickson_n title_n xxxi_o of_o the_o operation_n of_o the_o air_n on_o the_o taste_n of_o vegetable_a substance_n  _fw-fr title_n xxxii_o of_o the_o operation_n of_o the_o air_n on_o the_o taste_n of_o mineral_n substance_n  _fw-fr title_n xxxiii_o of_o the_o operation_n of_o the_o air_n on_o the_o colour_n of_o animal_n substance_n inquire_v of_o a_o man_n of_o letter_n that_o have_v the_o curiosity_n to_o travel_v into_o the_o inland_a part_n of_o brasil_n whether_o in_o that_o country_n the_o air_n have_v not_o a_o great_a influence_n upon_o the_o colour_n of_o clothes_n he_o tell_v i_o it_o have_v and_o even_o upon_o black_a insomuch_o that_o a_o kind_n of_o black_a taffeta_n which_o be_v the_o usual_a wear_n of_o the_o better_a sort_n will_n after_o it_o have_v be_v wear_v a_o very_a few_o day_n degenerate_a into_o a_o ironish_a colour_n yet_o he_o answer_v i_o that_o in_o the_o shop_n where_o it_o be_v careful_o keep_v from_o the_o air_n the_o taffeta_n continue_v of_o a_o good_a black_n nor_o be_v it_o only_o upon_o the_o colour_n of_o stuff_n but_o of_o animal_n too_o that_o he_o say_v the_o brasilian_n air_n have_v a_o operation_n for_o he_o say_v that_o at_o a_o place_n 50_o league_n beyond_o parigna_n there_o be_v a_o region_n where_o white_a people_n do_v in_o a_o very_a short_a time_n grow_v basannez_fw-fr or_o tawny_a though_o a_o little_a way_n out_o of_o that_o particular_a region_n as_o for_o instance_n beyond_o it_o they_o quick_o recover_v their_o wont_a colour_n he_o tell_v i_o that_o upon_o charleton_n island_n they_o have_v flock_n of_o certain_a bird_n which_o the_o english_a there_o call_v partridge_n though_o they_o resemble_v we_o more_o in_o bulk_n than_o shape_n be_v somewhat_o like_o wild_a pigeon_n but_o a_o good_a deal_n big_a these_o he_o say_v be_v white_a in_o the_o winter_n and_o gray_a in_o the_o