etc._n here_o our_o man_n be_v at_o a_o stand_n how_o will_v you_o expedite_v this_o difficulty_n a._n i_o have_v do_v it_o already_o for_o the_o air_n be_v beat_v back_o by_o the_o retraction_n of_o the_o sucker_n and_o find_v no_o place_n in_o the_o world_n which_o we_o suppose_v to_o be_v full_a where_o it_o may_v dispose_v itself_o beside_o that_o which_o by_o drive_v out_o other_o body_n from_o their_o place_n it_o may_v make_v for_o itself_o be_v by_o perpetual_a pulsion_n at_o length_n force_v in_o the_o cylinder_n with_o so_o great_a swiftness_n between_o the_o concave_a surface_n of_o the_o cylinder_n and_o the_o convex_a surface_n of_o the_o sucker_n as_o may_v answer_v that_o store_n of_o power_n which_o you_o find_v necessary_a to_o the_o draw_v back_o of_o the_o sucker_n now_o the_o air_n with_o what_o swiftness_n it_o enter_v retain_v the_o same_o within_o and_o then_o distend_v every_o way_n the_o side_n of_o the_o brass_n cylinder_n which_o be_v of_o itself_o elastical_a therefore_o the_o air_n in_o the_o cylinder_n being_n vehement_o move_v endeavour_n or_o thrust_v against_o all_o part_n of_o the_o concave_a surface_n of_o the_o cylinder_n but_o in_o vain_a until_o the_o sucker_n be_v draw_v back_o but_o as_o soon_o as_o the_o sucker_n have_v slip_v the_o hand_n ceases_z to_o make_v its_o impulse_n upon_o the_o air_n that_o air_n which_o be_v before_o drive_v in_o by_o reason_n of_o its_o endeavour_n against_o every_o point_n of_o the_o internal_a superficies_n of_o the_o cylinder_n and_o of_o the_o elastical_a force_n of_o the_o air_n will_v insinuate_v itself_o between_o the_o same_o surface_n with_o the_o same_o swiftness_n as_o that_o by_o which_o it_o be_v impel_v that_o be_v with_o that_o velocity_n which_o answer_v the_o strength_n of_o the_o impulsion_n if_o therefore_o so_o great_a a_o power_n of_o weight_n be_v hang_v upon_o the_o sucker_n as_o may_v answer_v the_o power_n of_o the_o hand_n by_o which_o it_o be_v impulss_v the_o swiftness_n with_o which_o the_o same_o air_n go_v out_o of_o the_o cylinder_n find_v no_o place_n in_o the_o world_n which_o be_v full_a where_o to_o dispose_v itself_o will_v again_o impel_v the_o sucker_n to_o the_o top_n of_o the_o cylinder_n for_o the_o same_o reason_n that_o the_o sucker_n a_o little_a before_o make_v a_o impulse_n upon_o the_o air._n p._n 44._o in_o vas_fw-la etc._n etc._n b._n we_o pour_v water_n into_o a_o open_a vessel_n we_o place_v in_o the_o water_n a_o long_a straight_o slender_a tube_n and_o we_o observe_v that_o the_o water_n do_v ascend_v from_o the_o vessel_n underneath_o into_o the_o erect_a tube_n a._n no_o wonder_n for_o the_o small_a particle_n that_o be_v intersperse_v in_o the_o air_n near_o the_o water_n do_v by_o their_o motion_n beat_v upon_o the_o surface_n of_o the_o water_n so_o that_o the_o water_n must_v of_o necessity_n ascend_v into_o the_o pipe_n and_o that_o sensible_o into_o a_o pipe_n that_o be_v so_o exceed_o slender_a p._n 45._o siquis_fw-la etc._n etc._n if_o any_o one_o after_o the_o frequently-repeated_n impulse_n and_o retraction_n of_o the_o sucker_n endeavour_v to_o draw_v out_o the_o stopple_n of_o the_o upper_a orifice_n of_o the_o receiver_n he_o shall_v find_v it_o gravitates_fw-la very_o much_o as_o if_o a_o weight_n of_o many_o pound_n hang_v upon_o it_o whence_o come_v this_o a._n from_o a_o strong_a circular_a endeavour_n of_o the_o air_n within_o the_o receiver_n make_v by_o the_o violent_a ingress_n of_o the_o air_n between_o the_o convex_a surface_n of_o the_o sucker_n and_o the_o concave_n of_o the_o cylinder_n procure_v by_o the_o repeat_v impulse_n and_o revulsion_n of_o the_o sucker_n which_o you_o improper_o call_v the_o exsuction_n of_o the_o air._n for_o by_o reason_n of_o the_o fullness_n of_o nature_n the_o stopple_n can_v be_v draw_v out_o but_o the_o air_n that_o be_v in_o the_o receiver_n contiguous_a to_o the_o stopple_n must_v be_v draw_v out_o too_o which_o air_n if_o it_o be_v settle_v and_o at_o rest_n the_o stopple_n will_v easy_o be_v draw_v out_o but_o while_o that_o doesmost_o swift_o circulate_a it_o come_v out_o very_o hardly_o that_o be_v it_o seem_v to_o be_v very_o heavy_a b._n very_o likely_a for_o as_o soon_o as_o fresh_a air_n be_v by_o degree_n let_v into_o the_o receiver_n it_o likewise_o by_o degree_n lose_v this_o seem_a gravity_n p._n 47._o vidimus_fw-la etc._n etc._n we_o see_v also_o water_n be_v let_v down_o into_o the_o receiver_n after_o some_o return_n of_o the_o motion_n of_o the_o sucker_n to_o bubble_v so_o as_o if_o it_o have_v boil_v over_o a_o fire_n a._n this_o likewise_o happen_v as_o we_o speak_v by_o reason_n of_o the_o swiftness_n of_o the_o circulate_v air_n unless_o perhaps_o you_o find_v the_o water_n hot_a too_o while_o it_o bubble_n for_o if_o we_o be_v sure_a it_o be_v hot_a we_o must_v find_v out_o some_o other_o cause_n of_o the_o phaenomenon_n b._n we_o be_v certain_a it_o be_v not_o sensible_o hot_a a._n in_o what_o therefore_o can_v the_o great_a or_o lesser_a motion_n of_o the_o atmosphere_n promote_v such_o a_o motion_n as_o this_o b._n i_o suppose_v they_o do_v not_o attribute_v this_o motion_n to_o the_o atmosphere_n p._n 49._o a._n it_o be_v manifest_a from_o this_o experiment_n that_o the_o receiver_n be_v not_o make_v empty_a by_o this_o exsuction_n of_o air_n as_o you_o call_v it_o for_o the_o water_n can_v not_o be_v move_v but_o by_o some_o contiguous_a mover_n that_o be_v itself_o in_o motion_n therefore_o this_o phaenomenon_n seem_v to_o contain_v no_o weak_a demonstration_n of_o my_o hypothesis_n p._n 50._o beside_o tell_v i_o can_v you_o see_v the_o water_n bubble_v in_o that_o manner_n b._n what_o else_o a._n do_v not_o your_o associate_n grant_v that_o vision_n be_v make_v by_o a_o continue_a action_n from_o the_o object_n unto_o the_o eye_n do_v they_o not_o also_o think_v action_n to_o be_v motion_n and_o all_o motion_n to_o be_v of_o some_o body_n how_o therefore_o can_v the_o motion_n be_v derive_v from_o the_o object_n the_o water_n unto_o your_o eye_n through_o a_o vacuum_n that_o be_v somewhat_o that_o be_v not_o a_o body_n b._n our_o friend_n do_v not_o affirm_v the_o recipient_a to_o be_v so_o empty_a that_o no_o air_n at_o all_o be_v leave_v a._n no_o matter_n whether_o the_o receiver_n be_v whole_o or_o for_o the_o great_a part_n empty_a for_o which_o ever_o you_o suppose_v the_o derivation_n of_o the_o motion_n from_o the_o object_n to_o the_o eye_n will_v be_v intercept_v b._n it_o may_v be_v so_o i_o can_v tell_v what_o to_o answer_v p._n 51._o credin_n '_o tu_o etc._n etc._n do_v you_o think_v these_o animal_n be_v therefore_o so_o quick_o kill_v because_o they_o want_v air_n how_o then_o do_v they_o who_o make_v a_o trade_n of_o dive_v live_v under_o water_n of_o who_o there_o be_v some_o who_o be_v accustom_v from_o their_o childhood_n have_v want_v air_n a_o whole_a hour_n no._n thatmost_a vehement_a motion_n by_o which_o bladder_n shut_v therein_o be_v distend_v and_o break_v kill_v these_o animal_n shut_v up_o in_o the_o receiver_n ibid._n ego_fw-la contra_fw-la etc._n etc._n i_o on_o the_o contrary_n think_v that_o neither_o the_o air_n can_v be_v suck_v out_o nor_o that_o the_o animal_n will_v so_o soon_o die_v if_o it_o be_v suck_v out_o the_o action_n indeed_o to_o which_o this_o death_n be_v a_o consequent_a may_v seem_v either_o a_o certain_a suction_n and_o so_o that_o the_o animal_n be_v kill_v by_o the_o exsuction_n of_o the_o include_v air_n its_o respiration_n be_v take_v away_o or_o a_o compulsion_n of_o the_o air_n from_o all_o part_n towards_o the_o centre_n of_o the_o spherical_a glass_n in_o which_o the_o animal_n be_v enclose_v and_o so_o may_v be_v see_v to_o die_v stifle_v by_o the_o tenacity_n of_o the_o compress_v air_n as_o it_o be_v with_o water_n the_o air_n more_o tenacious_a than_o usual_a be_v draw_v into_o the_o inward_o of_o the_o lung_n and_o there_o between_o the_o pulmonary_a artery_n and_o vein_n stop_v the_o course_n of_o the_o blood_n p._n 53._o placet_fw-la etc._n etc._n your_o hypothesis_n please_v i_o better_o than_o that_o of_o the_o spring_n of_o the_o air_n for_o from_o its_o truth_n depend_v the_o truth_n of_o a_o vacuum_n or_o a_o plenum_fw-la but_o from_o the_o truth_n of_o that_o nothing_o follow_v on_o either_o part_n of_o the_o question_n the_o make_v of_o the_o air_n say_v he_o be_v like_o that_o of_o compress_a wool_n well_o wool_n be_v make_v of_o hair_n or_o thread_n right_a but_o of_o what_o figure_n if_o of_o a_o parallelopipedon_n there_o can_v be_v no_o compression_n of_o part_n if_o not_o of_o a_o parallelopipedon_n there_o will_v be_v betwixt_o the_o hair_n certain_a space_n leave_v which_o if_o they_o be_v empty_a they_o suppose_v
find_v there_o do_v only_o arise_v as_o former_o a_o pretty_a number_n of_o small_a bubble_n that_o make_v there_o no_o sensible_a froth_n upon_o the_o surface_n of_o the_o distil_a vinegar_n there_o be_v make_v two_o or_o three_o exsuction_n of_o the_o air_n upon_o which_o there_o emerge_v from_o the_o coral_n such_o a_o multitude_n of_o bubble_n as_o make_v the_o whole_a body_n of_o the_o menstruum_fw-la appear_v white_a and_o soon_o aster_v a_o froth_n as_o big_a as_o all_o the_o rest_n of_o the_o liquor_n be_v see_v to_o swim_v upon_o it_o and_o the_o menstruum_fw-la plain_o appear_v to_o boil_v in_o the_o glass_n like_o a_o seethe_a pot._n and_o though_o if_o we_o desist_v but_o one_o minute_n from_o pump_v the_o decrement_n of_o the_o froth_n and_o ebullition_n upon_o the_o get_n in_o of_o a_o little_a air_n at_o some_o leak_n or_o other_o seem_v to_o argue_v that_o the_o removal_n of_o the_o pressure_n of_o the_o external_a air_n be_v the_o cause_n or_o at_o least_o the_o occasion_n of_o this_o effervescence_n yet_o to_o evince_v this_o the_o more_o clear_o we_o turn_v the_o key_n and_o let_v in_o the_o external_a air_n at_o the_o stop-cock_n immediate_o upon_o who_o entrance_n the_o froth_n vanish_v and_o so_o many_o of_o the_o bubble_n within_o the_o body_n of_o the_o liquor_n disappear_v that_o it_o lose_v its_o whiteness_n and_o grow_v transparent_a again_o the_o menstruum_fw-la also_o work_v as_o languid_o upon_o the_o coral_n as_o it_o do_v before_o they_o be_v put_v into_o the_o receiver_n but_o when_o we_o have_v again_o draw_v out_o the_o air_n first_o the_o whiteness_n re-appeared_a than_o the_o ebullition_n be_v renew_v which_o the_o pump_v be_v a_o while_n long_o and_o nimble_o pursue_v grow_v so_o great_a that_o for_o 3_o or_o 4_o time_n one_o aster_n another_o when_o ever_o the_o air_n be_v let_v out_o of_o the_o receiver_n into_o the_o empty_v cylinder_n the_o frothy_a liquor_n overflow_v the_o glass_n and_o run_v down_o by_o the_o side_n of_o it_o and_o yet_o upon_o the_o readmit_v of_o the_o exclude_v air_n the_o boil_a liquor_n grow_v immediate_o as_o calm_v and_o as_o transparent_a as_o at_o first_o as_o if_o indeed_o the_o operation_n of_o it_o upon_o the_o coral_n have_v be_v facilitated_a by_o the_o exsuction_n of_o the_o incumbent_a air_n which_o on_o its_o recess_n lest_o it_o more_o easy_a sore_n the_o more_o active_a part_n of_o the_o liquor_n to_o show_v themselves_o such_o than_o it_o be_v whilst_o the_o wont_a pressure_n of_o the_o air_n continue_v unremoved_a it_o may_v indeed_o be_v suspect_v that_o those_o vast_a and_o numerous_a bubble_n proceed_v not_o from_o the_o action_n of_o the_o menstruum_fw-la upon_o the_o coral_n but_o from_o the_o sudden_a emersion_n of_o those_o many_o little_a parcel_n of_o air_n that_o as_o we_o former_o observe_v be_v wont_a to_o be_v disperse_v in_o liquor_n without_o exclude_v spirit_n of_o vinegar_n but_o have_v have_v this_o suspicion_n before_o we_o try_v the_o experiment_n we_o convey_v our_o distil_a vinegar_n alone_o into_o the_o receiver_n and_o keep_v it_o a_o while_n there_o to_o free_v it_o from_o its_o bubble_n which_o be_v but_o very_o small_a before_o ever_o we_o put_v the_o coral_n into_o it_o it_o may_v be_v suspect_v likewise_o that_o the_o agitation_n of_o the_o liquor_n necessary_a follow_v upon_o the_o shake_n of_o the_o glass_n by_o pump_v may_v occasion_v the_o recite_v ebullition_n but_o upon_o trial_n make_v there_o appear_v not_o any_o notable_a change_n in_o the_o liquor_n or_o its_o operation_n though_o the_o contain_v vessel_n be_v shake_v provide_v no_o air_n be_v suck_v out_o of_o it_o the_o former_a experiment_n be_v another_o time_n try_v in_o another_o small_a receiver_n with_o coral_n gross_o powder_v and_o the_o success_n be_v very_o much_o alike_o scarce_o differ_v in_o any_o thing_n but_o that_o the_o coral_n be_v reduce_v to_o small_a part_n upon_o the_o ebullition_n of_o the_o liquor_n so_o many_o little_a lump_n of_o coral_n will_v be_v carry_v and_o buoy_z up_o by_o the_o emerge_a bubble_n as_o sometime_o to_o darken_v the_o viol_n though_o the_o same_o coraline_n corpuscle_n will_v be_v let_v fall_n again_o upon_o the_o let_n in_o of_o the_o air._n some_o thing_n also_o we_o try_v in_o our_o great_a receiver_n concern_v the_o solution_n of_o metal_n in_o aqua_fw-la fortis_fw-la and_o other_o corrosive_a liquor_n but_o partly_o the_o stink_n and_o partly_o some_o accident_n keep_v we_o from_o observe_v any_o thing_n peculiar_a and_o remarkable_a about_o those_o solution_n one_o thing_n we_o must_v not_o omit_v that_o when_o the_o spirit_n of_o vinegar_n be_v boil_v upon_o the_o coral_n we_o take_v off_o the_o cover_n of_o the_o receiver_n and_o take_v out_o the_o viol_n but_o can_v not_o find_v that_o notwithstanding_o so_o very_o late_a a_o ebullition_n the_o liquor_n have_v any_o heat_n great_a enough_o to_o be_v at_o all_o sensible_a to_o our_o hand_n experiment_n xliii_o we_o will_v now_o subjoin_v a_o experiment_n which_o if_o the_o former_a do_v not_o lessen_v the_o wonder_n of_o it_o will_v probable_o appear_v very_o strange_a to_o your_o lordship_n as_o it_o do_v to_o the_o first_o spectator_n of_o it_o the_o experiment_n be_v this_o we_o cause_v water_n to_o be_v boil_v a_o pretty_a while_n that_o by_o the_o heat_n it_o may_v be_v free_v from_o the_o latitant_fw-la air_n so_o often_o already_o take_v notice_n of_o in_o common_a water_n then_o almost_o fill_v with_o it_o a_o glass_n viol._n capable_a of_o contain_v near_o four_o ounce_n of_o that_o liquor_n we_o convey_v it_o whilst_o the_o water_n be_v yet_o hot_a into_o one_o of_o our_o small_a receiver_n big_a enough_o to_o hold_v about_o a_o pound_n of_o water_n and_o have_v lute_v on_o the_o cover_n we_o cause_v the_o air_n to_o be_v draw_v out_o upon_o the_o two_o first_o exsuction_n there_o scarce_o appear_v any_o change_n in_o the_o liquor_n nor_o be_v there_o any_o notable_a alteration_n make_v by_o the_o three_o but_o at_o the_o four_o and_o afterward_o the_o water_n appear_v to_o boil_v in_o the_o viol_n as_o if_o it_o have_v stand_v over_o a_o very_a quick_a fire_n for_o the_o bubble_n be_v much_o great_a than_o be_v usual_o find_v upon_o the_o ebullition_n of_o very_a much_o more_o water_n than_o be_v contain_v in_o our_o viol._n and_o this_o effervescence_n be_v so_o great_a in_o the_o upper_a part_n of_o the_o water_n that_o the_o liquor_n boil_v over_o the_o top_n of_o the_o neck_n a_o pretty_a deal_n of_o it_o run_v down_o into_o the_o receiver_n and_o sometime_o continue_v though_o more_o languid_o boil_v there_o prosecute_a this_o experiment_n we_o observe_v that_o sometime_o after_o the_o first_o ebullition_n we_o be_v reduce_v to_o make_v divers_a exsuction_n of_o the_o air_n before_o the_o liquor_n will_v be_v bring_v to_o boil_v again_o but_o at_o other_o time_n as_o often_o as_o the_o key_n be_v turn_v to_o let_v the_o air_n pass_v from_o the_o receiver_n into_o the_o pump_n the_o effervescence_n will_v begin_v afresh_o though_o the_o pump_n be_v ply_v for_o a_o pretty_a while_n together_o which_o seem_v to_o argue_v that_o the_o boil_a of_o the_o water_n proceed_v from_o hence_o that_o upon_o the_o withdraw_a the_o pressure_n of_o the_o incumbent_a air_n either_o the_o fiery_a corpuscle_n or_o rather_o the_o vapour_n agitate_a by_o the_o heat_n in_o the_o water_n which_o last_o what_o we_o have_v former_o note_v touch_v the_o raresy_v water_n of_o a_o aeolipile_n manifest_a to_o be_v capable_a of_o a_o elastical_a power_n be_v permit_v to_o expand_v themselves_o mighty_o in_o the_o evacuated_a receiver_n and_o do_v in_o their_o tumultuous_a dilatation_n list_v up_o as_o the_o air_n be_v wont_a to_o do_v the_o uppermost_a part_n of_o the_o water_n and_o turn_v it_o into_o bubble_n make_v the_o water_n appear_v boil_v this_o conjecture_n be_v far_o confirm_v by_o these_o additional_a circumstance_n first_o the_o effervescence_n be_v confine_v to_o the_o upper_a part_n of_o the_o water_n the_o low_a remain_v quiet_a unless_o the_o liquor_n be_v but_o shallow_a next_o although_o sometime_o as_o be_v already_o note_v the_o ebullition_n begin_v again_o after_o it_o have_v cease_v a_o pretty_a while_n which_o seem_v to_o infer_v that_o some_o concurrent_a cause_n whatever_o that_o be_v do_v a_o little_a modify_v the_o operation_n of_o heat_n yet_o when_o the_o water_n in_o the_o viol_n can_v by_o no_o pump_v be_v bring_v to_o boil_v any_o more_o the_o selfsame_a water_n be_v in_o the_o very_a same_o viol_n warm_v again_o and_o reconvey_v into_o the_o pneumatical_a glass_n be_v quick_o bring_v to_o boil_v afresh_o and_o that_o vehement_o and_o long_o enough_o not_o to_o mention_v that_o a_o new_a parcel_n take_v out_o of_o the_o same_o parcel_n of_o the_o boil_a
suspicion_n the_o experiment_n about_o the_o coal_n may_v easy_o suggest_v and_o which_o the_o event_n declare_v not_o to_o have_v be_v altogether_o groundless_a for_o upon_o the_o admission_n of_o the_o external_a air_n the_o fire_n that_o seem_v to_o have_v go_v out_o a_o pretty_a while_n before_o do_v present_o revive_v and_o be_v as_o it_o be_v refresh_v by_o the_o new_a air_n and_o blow_v by_o the_o wind_n make_v by_o that_o air_n in_o rush_v in_o it_o begin_v again_o to_o shine_v and_o dissipate_v the_o neighbour_a fuel_n into_o smoke_n as_o formal_o experiment_n xiii_o a_o while_o after_o we_o let_v down_o into_o the_o receiver_n together_o with_o a_o light_a piece_n of_o match_n a_o great_a bladder_n well_o tie_v at_o the_o neck_n but_o very_o lank_a as_o not_o contain_v actual_o much_o if_o any_o thing_n above_o a_o pint_n of_o air_n but_o be_v capable_a of_o contain_v ten_o or_o twelve_o time_n as_o much_o our_o scope_n in_o this_o experiment_n be_v partly_o to_o try_v whether_o or_o no_o the_o smoke_n of_o the_o match_n replenish_n the_o receiver_n will_v be_v able_a to_o hinder_v the_o dilatation_n of_o the_o inward_a air_n upon_o the_o exsuction_n of_o the_o ambient_fw-la and_o partly_o to_o discover_v whether_o the_o extinction_n of_o the_o fire_n in_o the_o match_n do_v proceed_v from_o want_n of_o air_n or_o bare_o from_o the_o pressure_n of_o its_o own_o fume_n which_o for_o want_v of_o room_n to_o expand_v themselves_o in_o may_v be_v suppose_v to_o recoil_v upon_o the_o fire_n and_o so_o to_o stifle_v it_o the_o event_n of_o our_o trial_n be_v that_o at_o the_o begin_n of_o our_o pump_v the_o match_n appear_v well_o light_v though_o it_o have_v almost_o fill_v the_o receiver_n with_o its_o plentiful_a fume_n but_o by_o degree_n it_o burn_v more_o and_o more_o dim_o notwithstanding_o that_o by_o the_o nimble_a draw_v out_o the_o air_n and_o smoke_n the_o vessel_n be_v make_v less_o opacous_a and_o less_o full_a of_o compress_v matter_n as_o appear_v by_o this_o that_o the_o long_o we_o pump_v the_o less_o air_n and_o smoke_n come_v out_o of_o the_o cylinder_n at_o the_o open_n of_o the_o valve_n and_o consequent_o the_o less_o come_v into_o it_o before_o yet_o the_o fire_n in_o the_o match_n go_v but_o slow_o out_o and_o when_o afterward_o to_o satisfy_v ourselves_o of_o its_o expiration_n we_o have_v darken_v the_o room_n and_o in_o vain_a endeavour_v to_o discover_v any_o spark_n of_o fire_n as_o we_o can_v not_o for_o some_o time_n before_o by_o the_o help_n of_o candle_n discern_v the_o least_o rise_n of_o smoke_n we_o yet_o continue_v pump_v six_o or_o seven_o time_n and_o after_o all_o that_o let_v in_o the_o air_n the_o seem_o dead_a fire_n quick_o revive_v and_o manifest_v its_o recovery_n by_o light_n and_o store_n of_o smoke_n with_o the_o latter_a of_o which_o it_o quick_o begin_v to_o replenish_v the_o receiver_n then_o we_o fall_v to_o pump_v afresh_o and_o continue_v that_o labour_n so_o long_o till_o the_o re_fw-mi kindle_v match_n go_v out_o again_o and_o think_v it_o then_o fit_v not_o to_o cease_v from_o pump_v so_o soon_o as_o before_o we_o find_v that_o in_o less_o than_o half_a a_o quarter_n of_o a_o hour_n the_o fire_n be_v get_v out_o for_o good_a and_o all_o and_o past_o the_o possibility_n of_o be_v recover_v by_o the_o readmit_v air._n some_o circumstance_n beside_o those_o already_o mention_v occur_v in_o the_o make_n of_o the_o experiment_n of_o which_o these_o be_v the_o principal_a first_o when_o the_o receiver_n be_v full_a of_o smoke_n if_o the_o cylinder_n be_v empty_v immediate_o upon_o the_o turn_n of_o the_o stop-cock_n the_o receiver_n will_v appear_v manifest_o darken_v to_o his_o eye_n that_o look_v upon_o the_o light_n through_o it_o and_o this_o darkness_n be_v much_o less_o when_o the_o receiver_n be_v much_o less_o fill_v with_o fume_n it_o be_v also_o instantaneous_a and_o seem_v to_o proceed_v from_o a_o sudden_a change_n of_o place_n and_o situation_n in_o the_o exhalation_n upon_o the_o vent_n sudden_o afford_v they_o and_o the_o air_n they_o be_v mix_v with_o out_o of_o the_o receiver_n into_o the_o cylinder_n the_o next_o thing_n we_o observe_v be_v a_o kind_n of_o halo_n that_o appear_v a_o good_a while_n about_o the_o fire_n and_o seem_v to_o be_v produce_v by_o the_o surround_v exhalation_n and_o last_o it_o be_v remarkable_a that_o even_o when_o the_o fume_n seem_v most_o to_o replenish_v the_o receiver_n they_o do_v not_o sensible_o hinder_v the_o air_n include_v in_o the_o bladder_n from_o dilate_v itself_o after_o the_o same_o manner_n for_o aught_o we_o can_v discern_v as_o it_o will_v have_v otherwise_o do_v so_o that_o before_o the_o fire_n or_o the_o match_n be_v quite_o extinct_a the_o bladder_n appear_v swell_v at_o least_o to_o six_o or_o seven_o time_n its_o former_a capacity_n since_o the_o write_n of_o these_o last_o line_n we_o take_v a_o small_a receiver_n capable_a of_o contain_v by_o guess_n about_o a_o pound_n and_o a_o half_a of_o water_n and_o in_o the_o midst_n of_o it_o we_o suspend_v a_o light_a match_n but_o though_o within_o one_o minute_n of_o a_o hour_n or_o there_o about_o from_o the_o put_n in_o of_o the_o match_n we_o have_v cement_v on_o the_o cover_n yet_o we_o can_v not_o make_v such_o haste_n but_o that_o before_o we_o begin_v to_o pump_v the_o smoke_n have_v so_o fill_v that_o small_a receiver_n as_o for_o aught_o we_o discern_v to_o choke_v the_o fire_n and_o have_v again_o and_o again_o reiterated_a the_o experiment_n it_o seem_v still_o as_o at_o first_o that_o we_o can_v not_o close_o up_o the_o vessel_n and_o pump_v out_o all_o the_o fume_n time_n enough_o to_o rescue_v the_o fire_n from_o extinction_n whereupon_o we_o make_v use_v of_o this_o expedient_a assoon_o as_o we_o have_v pump_v once_o or_o twice_o we_o sudden_o turn_v the_o key_n and_o thereby_o give_v access_n to_o the_o exclude_v air_n which_o rush_v violent_o in_o as_o if_o it_o have_v be_v force_v through_o a_o pair_n of_o bellows_o do_v both_o drive_v away_o the_o ash_n fill_v the_o glass_n with_o fresh_a air_n and_o by_o blow_v the_o almost_o extinguish_v fire_n re-kindled_a it_o as_o appear_v by_o the_o match_n begin_v again_o to_o smoke_n which_o before_o it_o have_v cease_v to_o do_v we_o have_v by_o this_o mean_v obtain_v a_o light_a match_n in_o the_o receiver_n without_o be_v reduce_v to_o spend_v time_n to_o close_v it_o up_o command_v the_o air_n to_o be_v immediate_o pump_v out_o and_o find_v that_o upon_o the_o exsuction_n of_o it_o the_o match_n quick_o leave_v smoke_v as_o it_o seem_v by_o reason_n of_o the_o absence_n of_o the_o air_n and_o yet_o if_o some_o urgent_a occasion_n have_v not_o hinder_v we_o we_o will_v for_o great_a security_n have_v try_v whether_o or_o no_o the_o match_n rekindle_v as_o former_o will_v smoke_v much_o long_o in_o case_n of_o no_o exsuction_n of_o the_o ambient_fw-la air._n experiment_n fourteen_o to_o try_v diverse_a thing_n at_o once_o and_o particular_o whether_o fire_n though_o we_o find_v it_o will_v not_o long_o last_v may_v not_o be_v produce_v in_o our_o evacuated_a receiver_n we_o take_v a_o pistol_n of_o about_o a_o foot_n in_o length_n and_o have_v firm_o tie_v it_o to_o a_o stick_n almost_o as_o long_o as_o the_o cavity_n of_o the_o receiver_n we_o very_o careful_o prime_v it_o with_o well_o dry_a gunpowder_n and_o then_o cock_v it_o we_o tie_v to_o the_o tricker_n one_o end_n of_o a_o string_n who_o other_o end_n be_v fasten_v to_o the_o key_n former_o mention_v to_o belong_v to_o the_o cover_n of_o our_o receiver_n this_o do_v we_o convey_v the_o pistol_n together_o with_o the_o annex_v staff_n into_o the_o vessel_n which_o be_v close_v up_o and_o empty_v aster_n the_o usual_a manner_n we_o begin_v to_o turn_v the_o key_n in_o the_o cover_n and_o thereby_o shorten_v the_o string_n that_o reach_v from_o it_o to_o the_o pistol_n we_o pull_v aside_o the_o tricker_n and_o observe_v that_o according_a to_o our_o expectation_n the_o force_n of_o the_o spring_n of_o the_o lock_n be_v not_o sensible_o abate_v by_o the_o absence_n of_o the_o air_n from_o who_o impetus_fw-la yet_o some_o modern_a naturalist_n will_v derive_v the_o cause_n of_o the_o motion_n of_o restitution_n in_o solid_a body_n for_o the_o cock_n fall_v with_o its_o wont_a violence_n upon_o the_o steel_n strike_v out_o of_o it_o as_o many_o and_o as_o conspicuous_a part_n of_o fire_n as_o for_o aught_o we_o can_v perceive_v it_o will_v have_v do_v in_o the_o open_a air._n repeat_v this_o experiment_n diverse_a time_n we_o also_o observe_v whether_o or_o no_o there_o will_v appear_v any_o considerable_a diversity_n in_o the_o motion_n of_o the_o shine_a spark_n in_o
varenius_n 19_o tell_v we_o that_o in_o the_o island_n common_o call_v azore_n the_o air_n and_o wind_n be_v so_o sharp_a that_o in_o a_o short_a time_n it_o fret_v not_o only_a iron_n plate_n but_o the_o very_a tile_n upon_o the_o roof_n of_o house_n and_o reduce_v they_o to_o dust_n and_o i_o have_v elsewhere_o mention_v some_o recent_a observation_n of_o this_o kind_n but_o it_o may_v be_v say_v that_o the_o abovementioned_a author_n ascribe_v the_o recite_v effect_n chief_o to_o the_o wind_n and_o that_o however_o the_o corrosion_n of_o the_o iron_n and_o the_o tile_n may_v proceed_v not_o from_o the_o air_n itself_o or_o any_o of_o its_o genuine_a part_n but_o from_o some_o saline_a corpuscle_n disperse_v through_o the_o air_n and_o drive_v by_o the_o wind_n against_o the_o body_n it_o be_v presume_v to_o fret_v and_o that_o such_o volatile_a salt_n may_v copious_o ascend_v into_o the_o air_n and_o yet_o retain_v their_o nature_n as_o do_v the_o more_o fix_a salt_n in_o the_o sea-water_n the_o sublimation_n of_o salarmoniack_a may_v sufficient_o evince_v not_o to_o mention_v that_o i_o have_v show_v some_o friend_n a_o secret_a kind_n of_o saline_a substance_n incomparable_o subtle_a than_o salarmoniack_a which_o do_v not_o only_o easy_o enough_o ascend_v itself_o but_o carry_v up_o with_o it_o and_o that_o in_o a_o very_a great_a proportion_n the_o solid_a and_o ponderous_a body_n even_o of_o uncalcine_v gold_n in_o the_o form_n of_o subtle_a exhalation_n which_o do_v afterward_o fasten_v themselves_o to_o the_o upper_a part_n of_o the_o vessel_n and_o yet_o manifest_v themselves_o to_o continue_v gold_n we_o remember_v also_o that_o to_o try_v whether_o water_n can_v be_v turn_v into_o air_n we_o once_o take_v a_o aeolipile_n into_o which_o we_o have_v before_o convey_v some_o water_n and_o place_v it_o upon_o kindle_a coal_n when_o the_o heat_n force_v out_o a_o vehement_a stream_n of_o aqueous_a vapour_n we_o tie_v about_o the_o neck_n of_o it_o that_o of_o a_o bladder_n which_o we_o have_v before_o empty_v of_o air_n and_o find_v the_o aeolipile_n after_o a_o while_n to_o blow_v up_o the_o bladder_n we_o careful_o tie_v it_o again_o that_o the_o include_v substance_n may_v not_o get_v away_o then_o slip_v it_o off_o from_o the_o aeolipile_n we_o convey_v it_o into_o our_o receiver_n to_o try_v whether_o or_o no_o that_o which_o in_o part_n distend_v the_o bladder_n will_v appear_v by_o its_o spring_n to_o be_v true_a air_n whereby_o we_o find_v that_o upon_o the_o exsuction_n of_o the_o ambient_fw-la air_n the_o include_v substance_n expanded_a itself_o and_o the_o bladder_n to_o a_o very_a much_o great_a bulk_n than_o it_o be_v of_o before_o and_o for_o far_a satisfaction_n have_v again_o take_v out_o the_o bladder_n we_o suffer_v it_o to_o remain_v tie_v up_o till_o next_o morning_n to_o try_v whether_o time_n and_o the_o coldness_n of_o the_o night_n will_v make_v the_o contain_v substance_n relapse_n into_o water_n but_o the_o next_o morning_n we_o find_v it_o little_o less_o tumid_a than_o before_o i_o remember_v i_o say_v that_o i_o once_o make_v this_o experiment_n but_o i_o may_v say_v in_o answer_n to_o it_o that_o the_o chief_a reason_n of_o my_o mention_v it_o be_v to_o let_v your_o lordship_n see_v how_o requisite_a it_o be_v to_o be_v circumspect_a and_o considerate_a when_o we_o be_v to_o make_v and_o to_o build_v upon_o nice_a experiment_n for_o though_o i_o may_v seem_v to_o have_v use_v sufficient_a caution_n yet_o afterward_o consider_v with_o myself_o that_o the_o aeolipile_v i_o have_v employ_v be_v a_o very_a large_a one_o and_o that_o it_o require_v much_o more_o care_n than_o one_o that_o have_v not_o try_v it_o will_v imagine_v to_o drive_v out_o all_o the_o air_n from_o a_o large_a aeolipile_n i_o easy_o suspect_v that_o the_o distension_n of_o the_o bladder_n in_o our_o pneumatical_a vessel_n may_v proceed_v not_o from_o the_o watery_a steam_n that_o come_v out_o at_o the_o narrow_a mouth_n of_o the_o aeolipile_n and_o have_v very_o much_o wet_v the_o bladder_n but_o from_o the_o rarefy_a air_n which_o in_o that_o sort_n of_o vessel_n be_v wont_n for_o a_o good_a while_n together_o to_o come_v out_o with_o the_o rarefy_a water_n and_o according_o have_v reiterated_a the_o experiment_n i_o find_v it_o very_o difficult_a by_o reason_n of_o the_o thrink_n of_o the_o bladder_n upon_o their_o be_v heat_v and_o of_o other_o impediment_n to_o make_v it_o so_o accurate_o as_o to_o deduce_v from_o it_o that_o water_n may_v be_v rarefy_v into_o true_a air._n against_o the_o other_o four_o abovementioned_a consideration_n we_o can_v spend_v time_n to_o frame_v objection_n but_o must_v forthwith_o proceed_v to_o the_o mention_n of_o those_o thing_n that_o seem_v to_o argue_v that_o air_n at_o least_o such_o as_o produce_v our_o bubble_n may_v be_v generate_v of_o water_n and_o other_o body_n first_o then_o we_o have_v find_v by_o experience_n that_o a_o vapid_a air_n or_o water_n rarefy_v into_o vapour_n may_v at_o least_o for_o a_o while_o emulate_v the_o elastical_a power_n of_o that_o which_o be_v general_o acknowledge_v to_o be_v true_a air._n for_o if_o you_o take_v a_o good_a aeolipile_n with_o a_o moderate_o strong_a and_o slender_a neck_n and_o fill_v it_o with_o water_n lay_v it_o upon_o quick_a coal_n you_o may_v after_o a_o while_o observe_v so_o great_a a_o pressure_n by_o some_o of_o the_o part_n contain_v in_o the_o aeolipile_n upon_o other_o that_o the_o water_n will_v sometime_o be_v throw_v up_o into_o the_o air_n above_o three_o or_o four_o foot_n high_a and_o if_o you_o then_o take_v the_o aeolipile_n almost_o red_a hot_a from_o off_o the_o fire_n you_o may_v perceive_v that_o the_o water_n will_v for_o a_o long_a time_n than_o one_o will_v easy_o imagine_v continue_v to_o be_v spout_v out_o in_o a_o violent_a stream_n and_o if_o there_o remain_v but_o little_a water_n in_o the_o aeolipile_n when_o it_o be_v take_v very_o hot_a from_o the_o fire_n immerse_v the_o neck_n of_o it_o into_o cold_a water_n you_o will_v find_v that_o after_o it_o begin_v to_o suck_v in_o some_o water_n there_o will_v be_v make_v from_o time_n to_o time_n store_n of_o large_a bubble_n in_o that_o water_n wherein_o the_o neck_n be_v plunge_v which_o bubble_n seem_v manifest_o to_o proceed_v from_o hence_o that_o for_o a_o while_o the_o heat_n in_o the_o aeolipile_n continue_v strong_a enough_o to_o rarefy_v part_n of_o the_o water_n that_o be_v suck_v in_o and_o expel_v it_o in_o the_o form_n of_o vapour_n through_o the_o water_n incumbent_a on_o the_o pipe_n if_o also_o when_o the_o aeolipile_n be_v almost_o full_a of_o water_n and_o therefore_o can_v contain_v but_o little_a air_n you_o hold_v a_o coal_n or_o brand_n in_o that_o stream_n of_o vapour_n that_o issue_v out_o of_o the_o narrow_a mouth_n of_o it_o you_o will_v find_v this_o vapid_a or_o rorid_a air_n if_o i_o may_v so_o call_v it_o to_o blow_v the_o fire_n very_o strong_o and_o with_o a_o roar_a noise_n and_o that_o it_o be_v not_o say_v that_o it_o be_v by_o the_o external_a air_n which_o the_o aqueous_a steam_n drive_v before_o they_o and_o not_o by_o the_o steam_n themselves_o that_o the_o blast_n be_v make_v and_o the_o flame_n excite_v it_o have_v be_v observe_v that_o by_o approach_v the_o coal_n or_o brand_n almost_o to_o the_o mouth_n of_o the_o aeolipile_n the_o wind_n appear_v more_o vehement_a than_o if_o the_o body_n to_o be_v kindle_v be_v hold_v some_o inch_n off_o but_o in_o regard_n the_o elastical_a power_n of_o the_o stream_n issue_v out_o of_o a_o aeolipile_n seem_v manifest_o due_a to_o the_o heat_n that_o expand_v and_o agitate_v the_o aqueous_a particle_n whereof_o that_o stream_n consist_v and_o that_o such_o rapid_a wind_n seem_v to_o be_v but_o water_n scatter_v into_o little_a part_n and_o set_v a-moving_a since_o we_o find_v that_o hold_v a_o knife_n or_o any_o solid_a smooth_a and_o close_a body_n against_o the_o stream_n that_o issue_v out_o of_o the_o aeolipile_n the_o vapour_n condense_v upon_o it_o will_v present_o cover_v it_o with_o water_n it_o will_v be_v very_o pertinent_a to_o subjoin_v a_o notable_a experiment_n that_o i_o remember_v i_o have_v meet_v with_o in_o the_o description_n give_v we_o by_o the_o industrious_a kircher_n of_o several_a musical_a engine_n and_o though_o it_o may_v seem_v somewhat_o prolix_a we_o will_v recite_v what_o he_o deliver_v in_o his_o own_o word_n which_o be_v these_o cum_fw-la eodem_fw-la tempore_fw-la quo_fw-la haec_fw-la scripsi_fw-la summi_fw-la pont._n innocentii_fw-la x_o mi_o mandato_fw-la organi_fw-la hydraulici_fw-la in_o horto_fw-la quirinali_fw-la 309._o constituendi_fw-la cura_fw-la mihi_fw-la commendata_fw-la esset_fw-la aeoliam_fw-la cameram_fw-la insigni_fw-la sanè_fw-la successu_fw-la construi_fw-la jussimus_fw-la eâ_fw-la quae_fw-la sequitur_fw-la
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