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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 &_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 vinager_n alone_o into_o the_o receiver_n and_o keep_v it_o awhile_o 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 &_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 coralline_a 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 something_o 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 &_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 vinager_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 43._o experiment_n 43._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 while_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 rarefy_a 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_fw-la dilatio_fw-la lift_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 further_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 water_n with_o the_o former_a and_o put_v in_o cold_a can_v by_o no_o pump_v be_v bring_v to_o the_o least_o show_n of_o effervescence_n beside_o have_v try_v this_o experiment_n in_o hot_a salad_n oil_n be_v a_o much_o more_o tenacious_a liquor_n and_o require_v a_o strong_a heat_n to_o make_v it_o boil_v can_v not_o be_v bring_v to_o a_o effervescence_n in_o our_o reciver_n whereas_o the_o chemical_a oil_n of_o turpentine_n be_v thin_a and_o more_o volatile_a be_v present_o make_v to_o boil_v up_o till_o it_o reach_v four_o or_o five_o time_n its_o former_a height_n in_o the_o viol_n in_o who_o bottom_n it_o lay_v and_o continue_v boil_v till_o it_o be_v almost_o reduce_v to_o be_v but_o lukewarm_a wine_n also_o be_v a_o more_o thin_a and_o spirituous_a liquor_n than_o water_n be_v convey_v in_o hot_a instead_o of_o the_o oil_n do_v as_o i_o remember_v at_o the_o very_a first_o exsuction_n begin_v to_o boil_v so_o vehement_o that_o in_o a_o short_a time_n that_o the_o pump_n be_v keep_v move_v four_o part_n of_o five_o by_o our_o guess_n boil_v over_o out_o of_o the_o viol_n though_o it_o have_v a_o pretty_a long_a neck_n on_o which_o occasion_n we_o will_v add_v that_o even_o the_o water_n itself_o near_o one_o half_a will_v sometime_o boil_v over_o into_o the_o receiver_n before_o it_o become_v lukewarm_a and_o it_o be_v also_o remarkable_a that_o once_o when_o the_o air_n have_v be_v draw_v out_o the_o liquor_n do_v upon_o a_o single_a exsuction_n boil_v so_o long_o with_o prodigious_o vast_a bubble_n that_o the_o effervescence_n last_v almost_o as_o long_o as_o be_v requisite_a for_o the_o rehearse_n of_o a_o pater_fw-la noster_fw-la now_o the_o experiment_n have_v be_v try_v more_o than_o once_o and_o find_v to_o succeed_v as_o to_o the_o main_a seem_v much_o to_o countenance_v the_o conjecture_n we_o make_v at_o the_o begin_n of_o this_o letter_n where_o we_o tell_v your_o lordship_n that_o perhaps_o the_o pressure_n of_o the_o air_n may_v have_v a_o interest_n in_o more_o phaenomena_n then_o man_n have_v hitherto_o think_v for_o as_o we_o have_v not_o then_o make_v this_o experiment_n so_o now_o we_o have_v make_v it_o it_o seem_v to_o teach_v that_o the_o air_n by_o its_o strong_a or_o weak_a pressure_n may_v very_o much_o modify_v as_o the_o schoolman_n speak_v divers_a of_o the_o operation_n of_o that_o vehement_a and_o tumultuous_a agitation_n of_o the_o small_a part_n of_o body_n
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 thereabouts_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_n 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 14._o experiment_n 14._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 yet_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 after_o 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 divers_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 a_o place_n where_o the_o remain_a air_n be_v so_o much_o rarify_v but_o can_v not_o perceive_v but_o that_o they_o move_v some_o of_o they_o upward_o as_o well_o as_o some_o of_o they_o downward_o and_o some_o of_o they_o sideways_o as_o they_o be_v wont_v to_o do_v when_o upon_o such_o collision_n they_o fly_v out_o in_o the_o open_a air._n we_o likewise_o cause_v a_o piece_n of_o steel_n to_o be_v make_v of_o the_o form_n and_o bigness_n of_o the_o flint_n in_o who_o place_n we_o put_v it_o and_o then_o the_o pistol_n be_v cock_v and_o convey_v into_o the_o receiver_n the_o trigger_n be_v pull_v after_o the_o air_n be_v draw_v out_o and_o though_o the_o place_n be_v purposely_o somewhat_o darken_v yet_o there_o appear_v not_o upon_o the_o strike_n of_o the_o two_o steel_n against_o each_o other_o the_o least_o spark_n of_o fire_n nor_o do_v we_o expect_v any_o have_v before_o in_o vain_a attempt_v to_o strike_v fire_n this_o way_n in_o the_o open_a air_n though_o we_o think_v fit_a to_o make_v the_o experiment_n to_o undeceive_v those_o who_o fancy_n in_o rarify_v air_n i_o know_v not_o what_o strange_a disposition_n to_o take_v fire_n upon_o a_o much_o slight_a occasion_n than_o this_o experiment_n afford_v we_o have_v indeed_o find_v that_o by_o the_o dextrous_a collision_n of_o two_o harden_v piece_n of_o steel_n store_n of_o spark_n may_v be_v strike_v out_o but_o that_o be_v do_v with_o such_o vehement_a percussion_n of_o the_o edge_n of_o the_o two_o steel_n as_o can_v not_o well_o be_v compass_v in_o our_o receiver_n but_o the_o chief_a thing_n we_o design_v to_o do_v with_o our_o pistol_n be_v to_o observe_v whether_o gunpowder_n will_v take_v fire_n in_o our_o empty_v and_o close_o stop_v glass_n whether_o the_o expansion_n of_o the_o flame_n will_v be_v considerable_o vary_v by_o the_o absence_n of_o so_o much_o of_o the_o ambient_fw-la air_n as_o be_v draw_v out_o of_o the_o receiver_n and_o whether_o the_o flame_n will_v diffuse_v itself_o upward_o as_o it_o be_v wont_a notwithstanding_o it_o be_v not_o have_v about_o it_o the_o usual_a proportion_n of_o air_n to_o force_v it_o up_o and_o though_o most_o of_o our_o attempt_n to_o fire_v the_o gunpowder_n in_o the_o pan_n of_o the_o pistol_n succeed_v not_o because_o we_o be_v fain_o to_o let_v it_o hang_v almost_o perpendicular_a in_o the_o receiver_n whereby_o the_o powder_n be_v shake_v down_o before_o the_o spark_n can_v reach_v it_o yet_o once_o the_o experiment_n succeed_v and_o the_o kindle_a powder_n seem_v to_o make_v a_o more_o expanded_a flame_n than_o it_o will_v have_v do_v in_o the_o open_a air_n but_o mount_v upward_o according_a to_o its_o wont_a 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memorable_a relation_n that_o i_o have_v meet_v with_o in_o the_o learned_a josephus_n acosta_n who_o tell_v we_o that_o when_o he_o himself_o past_o the_o high_a mountain_n of_o peru_n which_o they_o call_v pariaecaca_fw-la to_o which_o he_o say_v that_o the_o alps_o themselves_o seem_v to_o they_o but_o as_o ordinary_a house_n in_o regard_n of_o high_a tower_n he_o and_o his_o companion_n be_v surprise_v with_o such_o extreme_a pang_n of_o strain_v and_o vomit_v not_o without_o cast_v up_o blood_n too_o and_o with_o so_o violent_a a_o distemper_n that_o he_o conclude_v he_o shall_v undoubted_o have_v dye_v but_o that_o this_o last_v not_o above_o three_o or_o four_o hour_n before_o they_o come_v into_o a_o more_o convenient_a and_o natural_a temperature_n of_o air_n to_o which_o our_o learned_a author_n add_v a_o inference_n which_o be_v the_o principal_a thing_n
author_n absurd_a yet_o beside_o that_o it_o shall_v not_o be_v bare_o assert_v but_o explicate_v and_o prove_v and_o beside_o that_o some_o objection_n may_v be_v frame_v against_o it_o out_o of_o what_o have_v be_v already_o argue_v against_o the_o transmutation_n of_o air_n into_o vital_a spirit_n beside_o these_o thing_n it_o seem_v not_o probable_a that_o the_o bare_a want_n of_o the_o generation_n of_o the_o wont_a quantity_n of_o vital_a spirit_n for_o less_o than_o one_o minute_n shall_v within_o that_o time_n be_v able_a to_o kill_v a_o lively_a animal_n without_o the_o help_n of_o any_o external_a violence_n at_o all_o but_o yet_o on_o occasion_n of_o this_o opinion_n of_o paracelsus_n perhaps_o it_o will_v not_o be_v impertinent_a if_o before_o i_o proceed_v i_o acquaint_v your_o lordship_n with_o a_o conceit_n of_o that_o deserve_o famous_a mechanician_a and_o chemist_n cornelius_n drebell_n who_o among_o other_o strange_a thing_n that_o he_o perform_v be_v affirm_v by_o more_o than_o a_o few_o credible_a person_n to_o have_v contrive_v for_o the_o late_a learned_a king_n james_n a_o vessel_n to_o go_v under_o water_n of_o which_o trial_n be_v make_v in_o the_o thames_n with_o admire_a success_n the_o vessel_n carry_v twelve_o rower_n beside_o passenger_n one_o of_o which_o be_v yet_o alive_a and_o relate_v it_o to_o a_o excellent_a mathematician_n that_o inform_v i_o of_o it_o now_o that_o for_o which_o i_o mention_v this_o story_n be_v that_o have_v have_v the_o curiosity_n and_o opportunity_n to_o make_v particular_a inquiry_n among_o the_o relation_n of_o drebell_n and_o especial_o of_o a_o ingenious_a physician_n that_o marry_v his_o daughter_n concern_v the_o ground_n upon_o which_o he_o conceive_v it_o feasible_a to_o make_v man_n unaccustomed_a to_o continue_v so_o long_o under_o water_n without_o suffocation_n or_o as_o the_o last_o mention_v person_n that_o go_v in_o the_o vessel_n affirm_v without_o inconvenience_n i_o be_v answer_v that_o drebell_n conceive_v that_o it_o be_v not_o the_o whole_a body_n of_o the_o air_n but_o a_o certain_a quintessence_n as_o chemist_n speak_v or_o spirituous_a part_n of_o it_o that_o make_v it_o fit_a for_o respiration_n which_o be_v spend_v the_o remain_a grosser_n body_n or_o carcase_n if_o i_o may_v so_o call_v it_o of_o the_o air_n be_v unable_a to_o cherish_v the_o vital_a flame_n reside_v in_o the_o heart_n so_o that_o for_o aught_o i_o can_v gather_v beside_o the_o mechanical_a contrivance_n of_o his_o vessel_n he_o have_v a_o chemical_a liquor_n which_o he_o account_v the_o chief_a secret_a of_o his_o submarine_a navigation_n for_o when_o from_o time_n to_o time_n he_o perceive_v that_o the_o fine_a and_o pure_a part_n of_o the_o air_n be_v consume_v or_o over_o clog_v by_o the_o respiration_n and_o steame_n of_o those_o that_o go_v in_o his_o ship_n he_o will_v by_o unstop_v a_o vessel_n full_a of_o this_o liquor_n speedy_o restore_v to_o the_o trouble_a air_n such_o a_o proportion_n of_o vital_a part_n as_o will_v make_v it_o again_o for_o a_o good_a while_n fit_a for_o respiration_n whether_o by_o dissipate_v or_o precipitate_v the_o grosser_n exhalation_n or_o by_o some_o other_o intelligible_a way_n i_o must_v not_o now_o stay_v to_o examine_v content_v myself_o to_o add_v that_o have_v have_v the_o opportunity_n to_o do_v some_o service_n to_o those_o of_o his_o relation_n that_o be_v most_o intimate_v with_o he_o and_o have_v make_v it_o my_o business_n to_o learn_v what_o this_o strange_a liquor_n may_v be_v they_o constant_o affirm_v that_o drebell_n will_v never_o disclose_v the_o liquor_n unto_o any_o nor_o so_o much_o as_o tell_v the_o matter_n whereof_o he_o make_v it_o to_o above_o one_o person_n who_o himself_o assure_v i_o that_o it_o be_v this_o account_n of_o drebell_n performance_n i_o mention_v not_o that_o i_o any_o further_a assent_n to_o his_o opinion_n than_o i_o have_v already_o intimate_v but_o because_o the_o man_n and_o the_o invention_n be_v extraordinary_a i_o suppose_v your_o lordship_n will_v not_o be_v displease_v to_o know_v the_o utmost_a i_o can_v learn_v about_o it_o especial_o not_o have_v find_v it_o mention_v by_o any_o writer_n wherefore_o i_o have_v be_v sometime_o incline_v to_o favourable_a thought_n of_o their_o opinion_n who_o will_v have_v the_o air_n necessary_a to_o ventilate_v and_o cherish_v the_o vital_a flame_n which_o they_o do_v suppose_v to_o be_v continual_o burn_v in_o the_o heart_n for_o we_o see_v that_o in_o our_o engine_n the_o flame_n of_o a_o lamp_n will_v last_v almost_o as_o little_a after_o the_o exsuction_n on_o of_o the_o air_n as_o the_o life_n of_o a_o animal_n nay_o i_o remember_v that_o though_o i_o devise_v a_o more_o promise_a way_n to_o make_v a_o fire_n last_o in_o our_o exhaust_a receiver_n yet_o it_o will_v not_o succeed_v we_o take_v a_o hard_a body_n make_v in_o the_o form_n of_o a_o clove_n but_o twice_o as_o long_o and_o proportionable_o thick_a this_o body_n be_v make_v of_o such_o a_o composition_n that_o if_o it_o be_v kindle_a at_o the_o upper_a end_n it_o will_v most_o certain_o burn_v away_o to_o the_o very_a bottom_n much_o better_a than_o a_o match_n we_o convey_v it_o diverse_a time_n kindle_a at_o the_o upper_a end_n into_o one_o of_o our_o small_a receiver_n but_o still_o find_v that_o though_o present_o upon_o the_o exsuction_n of_o the_o air_n it_o will_v leave_v smoke_v and_o seem_v quite_o go_v out_o and_o again_o begin_v to_o smoke_v as_o soon_o as_o the_o air_n be_v let_v in_o upon_o it_o yet_o if_o the_o air_n be_v keep_v out_o but_o four_o or_o five_o minute_n the_o fire_n will_v be_v total_o and_o irrevocable_o extinguish_v to_o which_o we_o will_v add_v that_o though_o we_o convey_v into_o a_o great_a receiver_n a_o small_a lamp_n with_o rectify_v spirit_n of_o wine_n that_o be_v so_o pure_a as_o not_o to_o smut_v the_o cotton_n week_n or_o so_o much_o as_o a_o piece_n of_o white_a paper_n hold_v over_o it_o yet_o we_o can_v not_o by_o divers_a trial_n make_v the_o flame_n last_o a_o couple_n of_o minute_n after_o the_o air_n be_v begin_v to_o be_v draw_v out_o but_o though_o our_o engine_n thus_o show_v we_o a_o new_a kind_n of_o resemblance_n betwixt_o fire_n and_o life_n yet_o the_o opinion_n we_o have_v last_o mention_v be_v not_o free_a from_o difficulty_n for_o though_o in_o the_o heart_n of_o many_o animall_n blood_n be_v a_o warm_a liquor_n and_o in_o some_o even_o a_o hot_a one_o yet_o it_o be_v not_o easy_a to_o conceive_v either_o how_o the_o air_n in_o substance_n can_v get_v thither_o or_o how_o in_o case_n it_o can_v it_o be_v able_a to_o increase_v the_o heat_n since_o however_o the_o air_n may_v increase_v the_o heat_n of_o a_o coal_n by_o blow_v off_o the_o ash_n and_o make_v the_o active_a corpuscle_n pierce_v further_o into_o the_o kindle_a body_n and_o shatter_v it_o the_o more_o yet_o we_o see_v hot_a liquor_n have_v their_o heat_n allay_v and_o not_o augment_v by_o have_v air_n blow_v on_o they_o and_o whereas_o some_o eminent_a naturalist_n think_v it_o not_o inconvenient_a to_o make_v the_o heat_n reside_v in_o the_o heart_n to_o be_v a_o true_a flame_n provide_v they_o add_v that_o it_o be_v such_o a_o temperate_a and_o almost_o insensible_a fire_n as_o the_o flame_n of_o spirit_n of_o wine_n which_o will_v long_o burn_v upon_o fine_a white_a linen_n or_o paper_n without_o consume_v either_o give_v i_o leave_v to_o wish_v that_o they_o have_v be_v more_o curious_a to_o make_v differ_v trial_n with_o that_o liquor_n for_o as_o we_o observe_v in_o another_o treatise_n the_o reason_n why_o a_o linen_n cloth_n dip_v in_o common_a spirit_n of_o wine_n be_v not_o burn_v by_o the_o flame_n of_o it_o be_v because_o the_o phlegm_n of_o the_o liquor_n defend_v the_o cloth_n and_o the_o flame_n of_o spirit_n of_o wine_n be_v so_o far_o from_o be_v too_o weak_a to_o burn_v a_o piece_n of_o paper_n or_o of_o linen_n that_o i_o have_v use_v it_o in_o lamp_n to_o distil_v liquor_n out_o of_o tall_a cucurbit_n and_o find_v that_o the_o spirit_n burn_v away_o indeed_o much_o fast_o than_o salad_n oil_n but_o give_v at_o least_o as_o great_a a_o heat_n nay_o i_o have_v for_o curiosity_n sake_n melt_v crude_a gold_n and_o that_o ready_o enough_o with_o the_o bare_a flame_n of_o pure_a spirit_n of_o wine_n but_o not_o to_o press_v this_o any_o further_a we_o will_v on_o this_o occasion_n venture_v to_o subjoin_v a_o odd_a observation_n which_o may_v perhaps_o invite_v to_o a_o further_a enquiry_n into_o the_o opinion_n we_o have_v for_o discourse_n sake_n oppose_v our_o english_a democritus_n dr._n harvey_n propose_v this_o difficult_a and_o noble_a problem_n to_o anatomist_n why_o a_o faetus_fw-la even_o out_o of_o the_o womb_n if_o involve_v in_o the_o
press_v on_o the_o bladder_n the_o internal_a air_n not_o find_v the_o wont_a resistance_n first_o swell_v and_o distend_v the_o bladder_n and_o then_o break_v it_o with_o so_o wide_a and_o crooked_a a_o rent_n as_o if_o it_o have_v be_v forcible_o tear_v asunder_o with_o hand_n after_o which_o a_o second_o bladder_n be_v convey_v in_o the_o experiment_n be_v repeat_v with_o like_a success_n and_o i_o suppose_v it_o will_v not_o be_v imagine_v that_o in_o this_o case_n the_o bladder_n be_v break_v by_o its_o own_o fibre_n rather_o than_o by_o the_o imprison_v air._n and_o of_o this_o experiment_n these_o two_o phaenomena_n may_v be_v take_v notice_n of_o the_o one_o that_o the_o bladder_n at_o its_o break_n give_v a_o great_a report_n almost_o like_o a_o craker_n and_o the_o other_o that_o the_o air_n contain_v in_o the_o bladder_n have_v the_o power_n to_o break_v it_o with_o the_o mention_a impetuosity_n long_o before_o the_o ambient_fw-la air_n be_v all_o or_o near_o all_o draw_v out_o of_o the_o receiver_n but_o to_o verify_v what_o we_o say_v in_o another_o discourse_n where_o we_o show_v that_o even_o true_a experiment_n may_v by_o reason_n of_o the_o easy_a mistake_n of_o some_o unheeded_a circumstance_n be_v unsuccessful_o try_v we_o will_v advertise_v on_o this_o occasion_n that_o we_o do_v oftentimes_o in_o vain_a try_v the_o break_n of_o bladder_n after_o the_o manner_n abovementioned_a of_o which_o the_o cause_n appear_v to_o be_v this_o that_o the_o bladder_n we_o can_v not_o break_v have_v be_v bring_v we_o ready_a blow_v from_o those_o that_o sell_v they_o be_v grow_v dry_a before_o they_o come_v to_o our_o hand_n whence_o it_o come_v to_o pass_v that_o if_o we_o afterward_o tie_v they_o very_o hard_o they_o be_v apt_a to_o fret_v and_o so_o become_v unserviceable_a and_o if_o we_o tie_v they_o but_o moderate_o hard_a their_o stiffness_n keep_v they_o from_o be_v close_v so_o exact_o but_o that_o when_o the_o include_v air_n have_v in_o the_o exhaust_a receiver_n distend_v they_o as_o much_o as_o easy_o it_o can_v it_o will_v in_o part_n get_v out_o between_o the_o little_a wrinkle_n of_o the_o sphincter_n of_o tâ—e_v neck_n whence_o also_o it_o usual_o happen_v that_o upon_o the_o let_n in_o the_o air_n from_o without_o the_o bladder_n appear_v more_o flaccid_a and_o empty_a then_o before_o they_o be_v put_v in_o whereas_o when_o the_o bladder_n be_v bring_v we_o moist_a from_o the_o butcher_n we_o can_v without_o injure_v they_o tie_v their_o neck_n so_o close_o that_o none_o of_o the_o air_n once_o blow_v in_o can_v get_v out_o of_o they_o but_o by_o violent_o break_v they_o it_o will_v not_o be_v amiss_o on_o this_o occasion_n to_o point_n at_o something_o which_o may_v deserve_v a_o more_o deliberate_a speculation_n than_o we_o can_v now_o afford_v it_o namely_o that_o the_o elastical_a power_n of_o the_o sâ—me_a quantity_n of_o air_n may_v be_v as_o well_o increase_v by_o the_o agitation_n of_o the_o aërial_a particle_n whether_o only_o move_v they_o more_o swift_o and_o scatter_v they_o or_o also_o extend_v or_o stretch_v they_o out_o i_o determine_v not_o within_o a_o every_o way_n enclose_v and_o yet_o yield_a body_n as_o display_v by_o the_o withdraw_n of_o the_o air_n that_o press_v it_o without_o for_o we_o find_v that_o a_o bladder_n but_o moderate_o fill_v with_o air_n and_o strong_o tie_v be_v a_o while_n hold_v near_o the_o fire_n not_o only_o grow_v exceed_v turgid_a and_o hard_a but_o afterward_o be_v approach_v near_o to_o the_o fire_n sudden_o break_v with_o so_o loud_a and_o vehement_a a_o noise_n as_o stony_v those_o that_o be_v by_o and_o make_v we_o for_o a_o while_n after_o almost_o deaf_a 6._o experiment_n 6._o have_v thus_o see_v that_o the_o air_n have_v a_o elastical_a power_n we_o be_v next_o desirous_a to_o know_v in_o some_o measure_n how_o far_o a_o parcel_n of_o air_n may_v by_o this_o its_o own_o spring_n be_v dilate_v and_o though_o we_o be_v not_o provide_v of_o instrument_n fit_a to_o measure_v the_o dilatation_n of_o the_o air_n any_o thing_n accurate_o yet_o because_o a_o imperfect_a measure_n of_o it_o be_v more_o desirable_a than_o none_o at_o all_o we_o devise_v the_o follow_a method_n as_o very_o easy_o practicable_a we_o take_v a_o limber_a lamb_n bladder_n which_o be_v thorough_o wet_v in_o fair_a water_n that_o the_o side_n of_o it_o be_v squeeze_v together_o there_o may_v be_v no_o air_n leave_v in_o its_o fold_n as_o indeed_o we_o can_v not_o afterward_o upon_o trial_n discern_v any_o the_o neck_n of_o this_o bladder_n be_v strong_o tie_v about_o that_o of_o a_o small_a glass_n capable_a of_o hold_v five_o full_a drachma_n of_o water_n the_o bladder_n be_v first_o so_o compress_v that_o all_o the_o include_v air_n be_v only_o in_o the_o glass_n without_o be_v press_v there_o then_o the_o pump_n be_v set_v a-work_o after_o a_o few_o exsuction_n the_o air_n in_o the_o little_a viol_n begin_v to_o dilate_v itself_o and_o produce_v a_o small_a tumour_n in_o the_o neck_n of_o the_o bladder_n and_o as_o the_o ambient_fw-la air_n be_v more_o and_o more_o draw_v away_o so_o the_o include_v air_n penetrate_v further_o and_o further_o into_o the_o bladder_n and_o by_o degree_n lift_v up_o the_o side_n and_o display_v its_o fold_n till_o at_o length_n it_o seem_v to_o have_v blow_v it_o up_o to_o its_o full_a extent_n whereupon_o the_o external_a air_n be_v permit_v to_o flow_v back_o into_o the_o reciver_n repulse_v the_o air_n that_o have_v fill_v the_o bladder_n into_o its_o former_a narrow_a receptacle_n and_o bring_v the_o bladder_n to_o be_v again_o flaccid_a and_o wrinkle_a as_o before_o then_o take_v out_o the_o bladder_n but_o without_o sever_n it_o from_o the_o glass_n we_o do_v by_o a_o hole_n make_v at_o the_o top_n of_o the_o bladder_n fill_v the_o vessel_n they_o both_o make_v up_o with_o water_n who_o weight_n be_v five_o ounce_n five_o drachma_n and_o a_o half_a five_o drachma_n whereof_o be_v abovementioned_a to_o be_v the_o content_n of_o the_o bottle_n so_o that_o in_o this_o experiment_n when_o the_o air_n have_v most_o extend_v the_o bladder_n it_o possess_v in_o all_o above_o nine_o time_n as_o much_o room_n as_o it_o do_v when_o it_o be_v put_v into_o the_o receiver_n and_o it_o will_v probable_o have_v much_o enlarge_v its_o bound_n but_o that_o the_o bladder_n by_o its_o weight_n and_o the_o stick_v together_o of_o its_o side_n do_v somewhat_o resist_v its_o expansion_n and_o which_o be_v more_o considerable_a the_o bladder_n appear_v tumid_a enough_o whilst_o yet_o a_o pretty_a deal_n of_o air_n be_v leave_v in_o the_o receiver_n who_o exsuction_n will_v according_a to_o our_o former_a observation_n probable_o have_v give_v way_n to_o a_o further_a expansion_n of_o the_o air_n especial_o suppose_v the_o dilatation_n not_o to_o be_v restrain_v by_o the_o bladder_n since_o we_o write_v the_o other_o day_n the_o former_a experiment_n we_o have_v meet_v with_o some_o glass_n not_o very_o unfit_a for_o our_o purpose_n by_o mean_n of_o which_o we_o be_v now_o able_a with_o a_o little_a more_o trouble_n to_o measure_v the_o expansion_n of_o the_o air_n a_o great_a deal_n more_o accurate_o than_o we_o can_v by_o the_o help_n of_o the_o abovementioned_a bladder_n which_o be_v much_o to_o narrow_a to_o allow_v the_o air_n its_o utmost_a distension_n we_o take_v then_o first_o a_o cylindrical_a pipe_n of_o glass_n who_o bore_n be_v about_o a_o quarter_n of_o a_o inch_n in_o diameter_n this_o pipe_n be_v so_o bend_v and_o double_v that_o notwithstanding_o its_o be_v about_o two_o foot_n in_o length_n it_o may_v have_v be_v shut_v up_o into_o a_o small_a receiver_n not_o a_o foot_n high_a but_o by_o misfortune_n it_o crack_v in_o the_o cool_a whereby_o we_o be_v reduce_v to_o make_v use_n of_o one_o part_v which_o be_v straight_o and_o entire_a but_o exceed_v not_o six_o or_o seven_o inch_n this_o little_a tube_n be_v open_a at_o one_o end_n and_o at_o the_o other_o where_o it_o be_v hermetical_o seal_v have_v a_o small_a glass_n bubble_n to_o receive_v the_o air_n who_o dilatation_n be_v to_o be_v measure_v along_o the_o side_n of_o this_o tube_n be_v past_v a_o straight_a narrow_a piece_n of_o parchment_n divide_v into_o twenty_o six_o equal_a part_n mark_v with_o black_a line_n and_o figure_n that_o by_o they_o may_v be_v measure_v both_o the_o include_v air_n and_o its_o dilatation_n afterward_o we_o fill_v the_o tube_n with_o water_n almost_o to_o the_o top_n and_o stop_v the_o open_a end_n with_o a_o finger_n and_o invert_v the_o tube_n the_o air_n be_v permit_v to_o ascend_v to_o the_o abovementioned_a glass_n bubble_n and_o by_o reason_n this_o ascent_n be_v very_o slow_a it_o give_v we_o the_o opportunity_n to_o mark_v how_o
the_o flame_n go_v out_o though_o the_o snuff_n have_v be_v purposely_o leave_v of_o that_o length_n we_o judge_v the_o most_o convenient_a for_o the_o last_a of_o the_o flame_n but_o the_o second_o time_n have_v put_v in_o the_o same_o candle_n into_o the_o receiver_n after_o it_o have_v by_o the_o blast_n of_o a_o pair_n of_o bellows_o be_v free_v from_o fume_n the_o flame_n last_v about_o two_o minute_n from_o the_o time_n the_o pumper_n begin_v to_o draw_v out_o the_o air_n upon_o the_o first_o exsuction_n whereof_o the_o flame_n seem_v to_o contract_v itself_o in_o all_o its_o dimension_n and_o these_o thing_n be_v further_a observable_a that_o after_o the_o two_o or_o three_o first_o exsuction_n of_o the_o air_n the_o flame_n except_o at_o the_o very_a top_n appear_v exceed_o blue_a and_o that_o the_o flame_n still_o recede_v more_o and_o more_o from_o the_o tallow_n till_o at_o length_n it_o appear_v to_o possess_v only_o the_o very_a top_n of_o the_o week_n and_o there_o it_o go_v out_o the_o same_o candle_n be_v light_v again_o be_v shut_v into_o the_o receiver_n to_o try_v how_o it_o will_v last_v there_o without_o draw_v forth_o the_o air_n and_o we_o find_v that_o it_o last_v much_o long_o then_o former_o and_o before_o it_o go_v out_o recede_v from_o the_o tallow_n towards_o the_o the_o top_n of_o the_o week_n but_o not_o near_o so_o much_o as_o in_o the_o former_a experiment_n and_o have_v a_o intention_n to_o observe_v particular_o what_o the_o motion_n of_o the_o smoke_n will_v be_v in_o these_o experiment_n we_o take_v notice_n that_o when_o the_o air_n be_v not_o draw_v out_o there_o do_v upon_o the_o extinction_n of_o the_o flame_n a_o considerable_a part_n of_o the_o week_n remain_v kindle_v which_o probable_o by_o reason_n of_o the_o circulation_n of_o the_o air_n in_o the_o vessel_n occasion_v by_o the_o heat_n emit_v a_o steam_n which_o ascend_v swift_o and_o direct_o upward_o in_o a_o slender_a and_o uninterrupted_a cylinder_n of_o smoke_n till_o it_o come_v to_o the_o top_n whence_o it_o manifest_o recoil_v by_o the_o side_n to_o the_o low_a part_n of_o the_o vessel_n whereas_o when_o the_o flame_n go_v out_o upon_o the_o exsuction_n of_o the_o air_n one_o time_n when_o the_o flame_n retire_v very_o leisurely_o to_o the_o top_n we_o perceive_v it_o not_o to_o be_v follow_v by_o any_o smoke_n at_o all_o and_o at_o a_o other_o time_n the_o upper_a part_n of_o the_o week_n remain_v kindle_v after_o the_o extinction_n of_o the_o flame_n the_o slender_a steam_n of_o fume_n that_o do_v arise_v ascend_v but_o a_o very_a little_a way_n and_o then_o after_o some_o uncertain_a motion_n this_o and_o that_o way_n do_v for_o the_o most_o part_n soon_o fall_v downward_o be_v desirous_a also_o to_o try_v whether_o there_o will_v be_v any_o difference_n as_o well_o in_o our_o receiver_n as_o there_o be_v wont_a to_o be_v elsewhere_o betwixt_o candle_n make_v of_o wax_n and_o those_o make_v of_o tallow_n as_o to_o their_o duration_n we_o take_v slender_a taper_n of_o white_a wax_n common_o call_v virgin_n wax_v that_o be_v find_v to_o burn_v with_o much_o less_o smoke_n then_o common_a yellow_a wax_n six_o of_o these_o of_o like_a bigness_n and_o each_o of_o they_o of_o about_o the_o thickness_n of_o a_o swan_n quill_n we_o press_v together_o into_o one_o candle_n and_o have_v light_v all_o the_o week_n we_o let_v in_o the_o abovementioned_a wax_n into_o the_o receiver_n and_o make_v what_o haste_n we_o can_v to_o close_v it_o up_o with_o cement_n but_o though_o in_o the_o mean_a while_o we_o leave_v open_v the_o valve_n of_o the_o cylinder_n the_o hole_n of_o the_o stop-cock_n and_o that_o in_o the_o cover_n of_o the_o receiver_n that_o some_o air_n may_v get_v in_o to_o cherish_v the_o flame_n and_o the_o smoke_n may_v have_v a_o vent_n yet_o for_o so_o great_a a_o flame_n the_o air_n suffice_v not_o so_o much_o as_o till_o the_o cover_n can_v be_v perfect_o lute_v on_o so_o that_o before_o we_o be_v quite_o ready_a to_o employ_v the_o pump_n the_o candle_n be_v extinguish_v wherefore_o we_o take_v but_o one_o of_o the_o above_o mention_v taper_n and_o have_v light_v it_o close_v it_o up_o in_o the_o receiver_n to_o try_v how_o long_o a_o small_a flame_n with_o a_o proportionable_a smoke_n will_v continue_v in_o such_o a_o quantity_n of_o air_n but_o we_o find_v upon_o two_o several_a trial_n that_o from_o the_o begin_n of_o pump_v the_o flame_n go_v out_o in_o about_o a_o minute_n of_o a_o hour_n it_o appear_v indeed_o to_o we_o that_o the_o swing_a of_o the_o wire_n to_o and_o fro_o in_o the_o engine_n shake_v by_o pump_v hasten_v the_o vanish_v of_o the_o flame_n which_o seem_v by_o that_o motion_n to_o be_v cast_v sometime_o on_o one_o side_n of_o the_o week_n and_o sometime_o on_o the_o other_o but_o though_o once_o we_o purposely_o refrain_v pump_v after_o a_o very_a few_o exsuction_n of_o the_o air_n that_o the_o flame_n may_v not_o be_v agitate_a yet_o it_o last_v not_o much_o long_a than_o the_o new_o mention_v time_n and_o last_o close_v up_o the_o same_o taper_n light_v again_o to_o discover_v how_o long_o it_o will_v last_v without_o draw_v out_o of_o the_o air_n we_o find_v that_o it_o burn_v for_o a_o while_n vivid_o enough_o but_o afterward_o begin_v to_o be_v lessen_v more_o and_o more_o in_o all_o its_o dimension_n and_o we_o observe_v that_o the_o flame_n do_v not_o as_o before_z retire_v itself_o by_o little_a and_o little_a towards_o the_o top_n but_o towards_o the_o bottom_n of_o the_o week_n from_o which_o yet_o it_o do_v a_o little_a withdraw_v upward_o just_a before_o it_o go_v out_o so_o that_o the_o upper_a part_n of_o the_o week_n appear_v for_o a_o pretty_a while_n manifest_o above_o the_o top_n of_o the_o flame_n which_o have_v last_v about_o five_o minute_n be_v succeed_v by_o a_o direct_o ascend_v stream_n of_o smoak_n 11._o experiment_n 11._o there_o be_v take_v a_o wire_n which_o be_v bend_v almost_o in_o the_o form_n of_o a_o screw_n constitute_v such_o a_o instrument_n to_o contain_v coal_n and_o leave_v they_o every_o way_n accessible_a to_o the_o air_n as_o the_o ten_o figure_n declare_v the_o breadth_n of_o this_o vessel_n be_v no_o less_o than_o that_o it_o may_v with_o ease_n be_v convey_v into_o the_o receiver_n and_o have_v fill_v it_o to_o the_o height_n of_o about_o five_o inch_n with_o thorough_o kindle_a wood-coal_n we_o let_v it_o down_o into_o the_o glass_n and_o speedy_o close_v it_o we_o cause_v the_o pumper_n to_o ply_v his_o work_n and_o observe_v that_o upon_o the_o very_a first_o exsuction_n of_o the_o air_n though_o perhaps_o not_o because_o of_o that_o only_a the_o fire_n in_o the_o coal_n begin_v to_o grow_v very_o dim_a and_o though_o the_o agitation_n of_o the_o vessel_n do_v make_v they_o swing_v up_o and_o down_o which_o in_o the_o free_a air_n will_v have_v retart_v the_o extinction_n of_o the_o fire_n yet_o when_o we_o can_v no_o long_o discern_v any_o redness_n at_o all_o in_o any_o of_o they_o cast_v our_o eye_n upon_o a_o minute-watch_n we_o keep_v by_o we_o on_o this_o occasion_n we_o find_v that_o from_o the_o begin_n of_o the_o pump_v which_o may_v be_v about_o two_o minute_n after_o the_o coal_n have_v be_v put_v in_o glow_a to_o the_o total_a dis-appearing_a of_o the_o fire_n there_o have_v pass_v but_o three_o minute_n whereupon_o to_o try_v the_o experiment_n a_o little_a further_o we_o present_o take_v out_o the_o coal_n in_o which_o it_o seem_v there_o have_v remain_v some_o little_a parcel_n of_o fire_n rather_o cover_v then_o total_o quench_v for_o in_o the_o open_a air_n the_o coal_n begin_v to_o be_v rekindled_n in_o several_a place_n wherefore_o have_v by_o swing_v they_o about_o in_o the_o wire_n thorough_o light_v they_o the_o second_o time_n we_o let_v they_o down_o again_o into_o the_o receiver_n and_o close_v it_o speedy_o as_o before_o and_o then_o wait_v till_o the_o fire_n seem_v total_o extinct_a without_o meddle_v with_o the_o pump_n we_o find_v that_o from_o the_o time_n the_o vessel_n be_v close_v till_o that_o no_o fire_n at_o all_o can_v be_v perceive_v there_o have_v pass_v about_o four_o minute_n whereby_o it_o seem_v to_o appear_v that_o the_o draw_v away_o of_o the_o ambient_fw-la air_n make_v the_o fire_n go_v out_o soon_o than_o otherwise_o it_o will_v have_v do_v though_o that_o part_n of_o the_o air_n that_o we_o draw_v out_o leave_v the_o more_o room_n for_o the_o stifle_a steam_n of_o the_o coal_n to_o be_v receive_v into_o last_o have_v take_v out_o the_o wire_n and_o put_v other_o coal_n into_o it_o we_o do_v in_o the_o same_o room_n where_o the_o engine_n stand_v let_v it_o hang_v quiet_o by_o
a_o string_n in_o the_o open_a air_n to_o try_v how_o long_o the_o fire_n will_v last_v without_o agitation_n when_o no_o air_n be_v keep_v from_o it_o and_o we_o find_v that_o the_o fire_n begin_v to_o go_v out_o first_o at_o the_o top_n and_o outside_n of_o the_o coal_n but_o inward_o and_o near_o the_o bottom_n the_o fire_n continue_v visible_a for_o above_o half_a a_o hour_n a_o great_a part_n of_o the_o coal_n especial_o those_o next_o the_o bottom_n be_v burn_v to_o ash_n before_o the_o fire_n go_v out_o we_o cause_v likewise_o a_o piece_n of_o iron_n to_o be_v forge_v of_o the_o bigness_n of_o a_o middle_n size_v char-coal_n and_o have_v make_v it_o red_a hot_a throughout_o we_o cause_v it_o in_o the_o late_o mention_v wier_n to_o be_v speedy_o convey_v and_o shut_v up_o into_o the_o receiver_n be_v desirous_a to_o try_v what_o will_v become_v of_o a_o glow_a body_n by_o reason_n of_o its_o texture_n more_o vehement_o hot_a then_o a_o burn_a coal_n of_o the_o same_o bigness_n &_o yet_o unlike_a to_o send_v forth_o such_o copious_a &_o stifle_a fume_n but_o we_o can_v not_o observe_v any_o manifest_a change_n upon_o the_o exsuction_n of_o the_o air._n the_o iron_n begin_v indeed_o to_o lose_v its_o fiery_a redness_n at_o the_o top_n but_o that_o seem_v to_o be_v because_o it_o be_v at_o the_o upper_a end_n somewhat_o more_o slender_a then_o at_o the_o low_a the_o redness_n though_o it_o be_v in_o the_o day_n time_n continue_v visible_a about_o four_o minute_n and_o then_o before_o it_o do_v quite_o disappear_a we_o turn_v the_o key_n of_o the_o stop-cock_n but_o can_v not_o discern_v any_o change_n of_o the_o iron_n upon_o the_o rush_n in_o of_o the_o air._n yet_o some_o little_a remainder_n of_o wax_n that_o stick_v to_o the_o wire_n and_o be_v turn_v into_o fume_n by_o the_o heat_n of_o the_o neighbour_a iron_n seem_v to_o afford_v a_o more_o plentiful_a or_o at_o least_o a_o much_o more_o free_a expanded_a smoke_n when_o the_o air_n be_v suck_v out_o then_o afterward_o though_o allowance_n be_v make_v for_o the_o decrease_a heat_n of_o the_o iron_n and_o last_o notwithstanding_o a_o considerable_a exsuction_n of_o the_o ambient_fw-la air_n though_o not_o by_o far_o so_o great_a a_o one_o as_o may_v have_v be_v make_v by_o the_o engine_n and_o notwithstanding_o the_o inconsiderable_a dissipation_n of_o the_o part_n of_o the_o iron_n the_o surround_v side_n of_o the_o receiver_n be_v sensible_o and_o almost_o offensive_o heat_v by_o it_o insomuch_o that_o a_o pretty_a while_n after_o the_o iron_n be_v take_v out_o the_o side_n of_o the_o glass_n manifest_o retain_v a_o warmth_n which_o will_v not_o be_v unfit_a to_o be_v consider_v by_o a_o person_n at_o more_o leisure_n than_o i_o be_o now_o be_v willing_a to_o try_v after_o this_o something_o that_o will_v not_o cherish_v much_o fire_n at_o once_o 12._o experiment_n 12._o and_o will_v keep_v fire_n much_o long_o than_o a_o coal_n we_o take_v a_o piece_n of_o match_n such_o as_o soldier_n use_v of_o the_o thickness_n of_o a_o man_n little_a finger_n or_o somewhat_o thick_a and_o this_o be_v well_o light_v at_o one_o end_n be_v by_o a_o string_n suspend_v with_o that_o end_n downward_o in_o the_o cavity_n of_o the_o receiver_n which_o be_v immediate_o close_v and_o yet_o by_o that_o time_n it_o can_v well_o be_v so_o the_o copious_a fume_n of_o the_o match_n have_v near_o fill_v and_o darken_v the_o receiver_n wherefore_o lest_o the_o vessel_n shall_v be_v endanger_v the_o pump_n be_v nimble_o ply_v and_o a_o great_a deal_n of_o air_n and_o smoke_n mix_v together_o be_v draw_v out_o whereby_o the_o receiver_n grow_v more_o clear_a we_o can_v discern_v the_o fire_n in_o the_o match_n to_o burn_v more_o and_o more_o languid_o and_o notwithstanding_o that_o by_o the_o diligence_n use_v in_o pump_v it_o seem_v to_o have_v room_n enough_o allow_v it_o to_o throw_v out_o fume_n yet_o after_o no_o long_a time_n it_o cease_v from_o be_v discernible_a either_o by_o its_o light_n or_o its_o smoke_n and_o though_o by_o that_o we_o be_v invite_v to_o suppose_v it_o quite_o extinguish_v yet_o we_o continue_v pump_v a_o while_n in_o prosecution_n of_o another_o experiment_n we_o be_v try_v at_o the_o same_o time_n and_o this_o we_o do_v the_o more_o willing_o because_o of_o a_o 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 refreshd_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 former_o 13._o experiment_n 13._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 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the_o bottom_n be_v every_o way_n bend_v inward_o that_o so_o the_o orifice_n not_o much_o exceed_v a_o quarter_n of_o a_o inch_n in_o diameter_n may_v be_v the_o more_o easy_o and_o exact_o stop_v by_o the_o experimenter_n finger_n between_o which_o and_o the_o quicksilver_n that_o there_o may_v be_v no_o air_n intercept_v as_o very_o often_o it_o happen_v that_o there_o be_v it_o be_v requisite_a that_o the_o tube_n be_v fill_v as_o full_a as_o possible_o it_o can_v be_v that_o the_o finger_n which_o be_v to_o stop_v it_o press_v upon_o the_o accumulate_v and_o protuberant_a mercury_n may_v rather_o throw_v down_o some_o than_o not_o find_v enough_o exact_o to_o keep_v out_o the_o air._n it_o be_v also_o a_o useful_a and_o compendious_a way_n not_o to_o fill_v the_o tube_n at_o first_o quite_o full_o of_o mercury_n but_o to_o leave_v near_o the_o top_n about_o a_o quarter_n of_o a_o inch_n empty_a for_o if_o you_o then_o stop_v the_o open_a end_n with_o your_o finger_n and_o invert_v the_o tube_n that_o quarter_n of_o a_o inch_n of_o air_n will_v ascend_v in_o a_o great_a bubble_n to_o the_o top_n and_o in_o its_o passage_n thither_o will_v gather_v up_o all_o the_o little_a bubble_n and_o unite_v they_o with_o itself_o into_o one_o great_a one_o so_o that_o if_o by_o reinvert_v the_o tube_n you_o let_v that_o bubble_n return_n to_o the_o open_a end_n of_o it_o you_o will_v have_v a_o much_o close_a mercurial_a cylinder_n than_o before_o and_o need_v but_o to_o add_v a_o very_a little_a quicksilver_n more_o to_o fill_v up_o the_o tube_n exact_o and_o last_o as_o for_o those_o lesser_a and_o inconspicuous_a parcel_n of_o air_n which_o can_v this_o way_n be_v glean_v up_o you_o may_v endeavour_v before_o you_o invert_v the_o tube_n to_o free_v the_o quicksilver_n from_o they_o by_o shake_v the_o tube_n and_o gentle_o knock_v on_o the_o outside_n of_o it_o after_o every_o little_a parcel_n of_o quicksilver_n which_o you_o pour_v in_o and_o afterward_o by_o force_v 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about_o five_o week_n amount_v to_o full_a two_o inch_n of_o which_o we_o find_v by_o our_o several_a mark_n whereby_o we_o have_v take_v notice_n of_o its_o several_a remove_n that_o it_o have_v descend_v about_o â—_o 16_o of_o a_o inch_n from_o the_o place_n where_o it_o first_o settle_v &_o the_o other_o inch_n and_o â—_o 16_o it_o have_v ascend_v and_o it_o seem_v probable_a that_o the_o height_n of_o the_o mercurial_a cylinder_n will_v have_v vary_v yet_o more_o if_o the_o experiment_n have_v be_v make_v in_o the_o open_a air_n and_o in_o a_o long_a tube_n where_o the_o particle_n of_o the_o imprison_v air_n by_o have_v more_o room_n to_o display_v themselves_o in_o may_v not_o have_v have_v so_o strong_a a_o spring_n to_o work_v upon_o the_o quicksilver_n with_o but_o for_o want_n both_o of_o time_n and_o of_o a_o competent_a quantity_n of_o mercury_n which_o be_v not_o to_o be_v procure_v where_o we_o than_o happen_v to_o be_v we_o be_v unable_a to_o make_v any_o further_a 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of_o light_n yet_o it_o be_v indeed_o but_o a_o whiteness_n which_o do_v as_o have_v already_o be_v note_v opacate_v as_o some_o speak_v the_o inside_n of_o the_o glass_n next_o we_o consider_v that_o our_o common_a air_n abound_v with_o particle_n or_o little_a body_n capable_a to_o reflect_v the_o beam_n of_o light_n of_o this_o we_o may_v easy_o give_v divers_a proof_n but_o we_o shall_v name_v but_o two_o the_o one_o that_o vulgar_a observation_n of_o the_o mote_n that_o appear_v in_o multitude_n swim_v up_o and_o down_o in_o the_o air_n when_o the_o sunbeam_n shoot_v into_o a_o room_n or_o any_o other_o shady_a place_n discover_v they_o though_o otherwise_o the_o eye_n can_v distinguish_v they_o from_o the_o rest_n of_o the_o air_n the_o other_o proof_n we_o will_v take_v from_o what_o we_o and_o no_o doubt_n very_o many_o other_o have_v observe_v touch_v the_o illumination_n of_o the_o air_n in_o the_o night_n and_o we_o particular_o remember_v that_o be_v at_o some_o distance_n 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out_o part_n of_o the_o air_n bring_v he_o to_o droop_v and_o to_o appear_v swell_v and_o by_o let_v in_o the_o air_n again_o we_o soon_o reduce_v he_o to_o his_o former_a liveliness_n a_o digression_n contain_v some_o doubt_n touch_v respiration_n i_o fear_v your_o lordship_n will_v now_o expect_v that_o to_o these_o experiment_n i_o shall_v add_v my_o reflection_n on_o they_o and_o attempt_v by_o their_o assistance_n to_o resolve_v the_o difficulty_n that_o occur_v about_o respiration_n since_o at_o the_o beginning_n i_o acknowledge_v a_o further_a enquiry_n into_o the_o nature_n of_o that_o to_o have_v be_v my_o design_n in_o the_o relate_a trial_n but_o i_o have_v yet_o because_o of_o the_o inconvenient_a season_n of_o the_o year_n make_v so_o few_o experiment_n and_o have_v be_v so_o little_o satisfy_v by_o those_o i_o have_v be_v able_a to_o make_v that_o they_o have_v hitherto_o make_v respiration_n appear_v to_o i_o rather_o a_o more_o than_o a_o less_o mysterious_a thing_n than_o it_o do_v before_o but_o yet_o since_o they_o have_v furnish_v i_o with_o some_o such_o new_a consideration_n concern_v the_o use_n of_o the_o air_n as_o confirm_v i_o in_o my_o diffidence_n of_o the_o truth_n of_o what_o be_v common_o believe_v touch_v that_o matter_n that_o i_o may_v not_o appear_v sullen_a or_o lazy_a i_o be_o content_a not_o to_o decline_v employ_v a_o few_o hour_n in_o set_v down_o my_o doubt_n iâ—_n present_v your_o lordship_n some_o hint_n and_o in_o consider_v whether_o the_o trial_n make_v in_o our_o engine_n will_v at_o least_o assist_v we_o to_o discover_v wherein_o the_o deficiency_n lie_v that_o needs_o to_o be_v supply_v and_o this_o my_o lord_n be_v all_o my_o present_a design_n i_o suppose_v you_o will_v not_o expect_v that_o as_o if_o you_o know_v not_o or_o have_v forget_v what_o anatomist_n be_v wont_a to_o teach_v i_o shall_v entertain_v you_o with_o a_o needless_a discourse_n of_o the_o organ_n of_o respiration_n and_o the_o variety_n of_o their_o structure_n in_o several_a animal_n though_o if_o it_o be_v necessary_a and_o have_v not_o be_v perform_v by_o other_o i_o shall_v think_v 3._o galeâ—us_fw-fr de_fw-fr usu_fw-la part_n lib_n 3._o with_o galen_n that_o by_o treat_v of_o the_o fabric_n of_o live_a body_n i_o may_v compose_v hymn_n to_o the_o wise_a author_n of_o nature_n who_o in_o the_o excellent_a contrivance_n of_o the_o lung_n and_o other_o part_n of_o those_o admirable_a engine_n animal_n manifest_v himself_o to_o be_v indeed_o what_o the_o eloquent_a prophet_n most_o just_o speak_v he_o wonderful_a in_o council_n 28.29_o isa._n 28.29_o and_o excellent_a in_o work_v nor_o shall_v we_o any_o further_o meddle_v with_o those_o controversy_n so_o much_o agitate_a among_o the_o modern_n namely_o whether_o the_o motion_n of_o the_o lung_n in_o respiration_n be_v their_o own_o or_o but_o consequent_a to_o the_o motion_n of_o the_o thorax_n diaphragme_n and_o as_o some_o learned_a man_n will_v have_v it_o the_o abdomen_fw-la and_o whence_o it_o be_v that_o the_o air_n swell_v the_o lung_n in_o inspiration_n any_o further_a than_o they_o may_v receive_v light_n from_o our_o engine_n but_o that_o it_o may_v appear_v what_o kind_n of_o service_n it_o be_v that_o may_v be_v expect_v from_o it_o on_o this_o occasion_n we_o must_v premise_v a_o few_o word_n to_o show_v wherein_o the_o strength_n of_o the_o objection_n we_o be_v to_o answer_v lie_v in_o favour_n then_o of_o those_o that_o will_v have_v the_o lung_n rather_o passive_a then_o active_a in_o the_o business_n of_o respiration_n it_o may_v against_o the_o common_a opinion_n be_v allege_v that_o as_o the_o lung_n be_v destitute_a of_o muscle_n and_o of_o fibres_n be_v unfit_a to_o dilate_v themselves_o so_o it_o appear_v that_o without_o the_o motion_n of_o the_o thorax_n they_o will_v not_o be_v fill_v with_o air._n since_o as_o our_o learned_a friend_n dr._n highmore_n have_v well_o and_o congruous_o to_o what_o ourselves_o have_v purposely_o try_v observe_v if_o a_o live_v dog_n have_v a_o great_a wound_n make_v in_o his_o chest_n the_o lobe_n of_o the_o lung_n on_o that_o side_n of_o the_o mediastinum_n will_v subside_o and_o lie_v still_o the_o thorax_n and_o the_o lobe_n on_o the_o other_o side_n of_o the_o mediastinum_fw-la continue_v their_o former_a motion_n and_o if_o sudden_o at_o once_o the_o muscle_n of_o the_o chest_n be_v on_o both_o side_n dissect_v upon_o the_o ingress_n of_o the_o air_n the_o whole_a lung_n though_o untouched_a will_v remain_v moveless_a at_o least_o as_o to_o any_o expansion_n or_o contraction_n of_o their_o substance_n to_o which_o we_o may_v add_v the_o observation_n of_o the_o diligent_a bartholinus_n who_o affirm_v the_o like_a of_o the_o diaphragme_n also_o namely_o that_o it_o be_v wound_v the_o lung_n will_v fall_v together_o and_o the_o respiration_n cease_v which_o my_o experiment_n oppose_v not_o provide_v the_o wound_n be_v any_o thing_n great_a and_o indeed_o the_o diaphragme_n seem_v the_o principal_a instrument_n of_o ordinary_a and_o gentle_a respiration_n although_o to_o restrain_a respiration_n if_o i_o may_v so_o call_v it_o the_o intercostal_a muscle_n and_o perhaps_o some_o other_o may_v be_v allow_v eminent_o to_o concur_v but_o the_o chief_a of_o the_o controversy_n former_o point_v at_o be_v not_o yet_o decide_v namely_o what_o it_o be_v that_o convey_v the_o air_n into_o the_o lung_n for_o when_o to_o counterbalance_v all_o that_o have_v be_v allege_v those_o that_o plead_v for_o the_o lung_n demand_v what_o it_o be_v that_o shall_v bring_v the_o air_n into_o the_o lung_n if_o themselves_o do_v not_o attract_v it_o their_o antagonist_n disagree_v about_o the_o reply_n for_o when_o to_o this_o question_n some_o of_o the_o best_a modern_a philosopher_n answer_v
destroy_v a_o little_a animal_n or_o at_o least_o make_v the_o air_n too_o intemperate_o hot_a to_o be_v fit_a for_o respiration_n but_o though_o this_o be_v a_o difficulty_n not_o so_o easy_o to_o be_v resolve_v without_o the_o assistance_n of_o our_o engine_n yet_o i_o suppose_v we_o have_v already_o answer_v the_o objection_n by_o our_o 38_o and_o 39_o experiment_n which_o though_o we_o make_v partly_o for_o other_o purpose_n yet_o we_o premise_v they_o only_o to_o clear_v up_o the_o difficulty_n propose_v another_o suspicion_n we_o shall_v have_v entertain_v concern_v the_o death_n of_o our_o animal_n namely_o that_o upon_o the_o sudden_a removal_n of_o the_o wont_a pressure_n of_o the_o ambient_fw-la air_n the_o warm_a blood_n of_o those_o animal_n be_v bring_v to_o a_o effervescence_n or_o ebullition_n or_o at_o least_o so_o vehement_o expanded_a as_o to_o disturb_v the_o circulation_n of_o the_o blood_n and_o so_o disorder_v the_o whole_a oeconomy_n of_o the_o body_n this_o i_o say_v i_o shall_v have_v have_v some_o suspicion_n of_o but_o that_o animal_n of_o a_o hot_a constitution_n be_v not_o the_o sole_a one_o that_o can_v in_o our_o exhaust_a engine_n exercise_v the_o function_n of_o life_n but_o i_o must_v not_o now_o dwell_v upon_o matter_n of_o this_o nature_n because_o i_o think_v it_o high_a time_n to_o proceed_v to_o the_o consideration_n of_o the_o principal_a subject_n of_o our_o engine_n namely_o the_o use_n of_o respiration_n or_o rather_o the_o use_n of_o the_o air_n in_o respiration_n for_o whereas_o of_o the_o divers_a use_n of_o it_o mention_v by_o anatomist_n the_o most_o such_o as_o the_o production_n and_o modulation_n of_o the_o voice_n by_o the_o elision_n of_o the_o air_n the_o larynx_n etc._n etc._n the_o expulsion_n of_o excrement_n by_o cough_n the_o convey_n in_o of_o odour_n by_o inspiration_n and_o some_o other_o rather_o convenient_a for_o the_o well_o be_v of_o a_o animal_n then_o absolute_o necessary_a to_o his_o life_n whereas_o i_o say_v the_o other_o use_n be_v such_o as_o we_o have_v say_v the_o great_a hypocrates_n himself_o give_v this_o notable_a testimony_n to_o the_o use_n of_o the_o air_n as_o to_o animal_n endow_v with_o lung_n mortalibus_fw-la say_v he_o hic_fw-la spiritus_fw-la tum_fw-la aquavitae_fw-la tum_fw-la morborum_fw-la aegrotis_fw-la causa_fw-la est_fw-la tantáque_fw-la corporibus_fw-la omnibus_fw-la spiritûs_fw-la inest_fw-la necessitas_fw-la ut_fw-la siquidem_fw-la aliis_fw-la omnibus_fw-la &_o cibis_fw-la &_o potionibus_fw-la quis_fw-la abstineat_fw-la dvos_fw-la tamen_fw-la aut_fw-la tres_fw-la vel_fw-la plures_fw-la dies_fw-la possit_fw-la vitam_fw-la ducere_fw-la at_o si_fw-la quis_fw-la spiritus_fw-la in_o corpus_fw-la vias_fw-la intercipiat_fw-la vel_fw-la exiguâ_fw-la diei_fw-la parte_fw-la homini_fw-la pereundum_fw-la sit_fw-la adâ—o_n necessarius_fw-la est_fw-la usus_fw-la spiritûs_fw-la in_o corpore_fw-la ad_fw-la haec_fw-la quoque_fw-la quum_fw-la omnibus_fw-la aliis_fw-la actionibus_fw-la homines_fw-la quâ—escant_fw-la quod_fw-la mutationibus_fw-la innumeris_fw-la vita_fw-la sit_fw-la exposita_fw-la ab_fw-la hâc_fw-la tamen_fw-la solá_fw-la actione_n nunquam_fw-la desistant_fw-la animantia_fw-la quin_fw-la aut_fw-la spiritum_fw-la adducant_fw-la aut_fw-la reddant_fw-la but_o touch_v the_o account_n upon_o which_o the_o inspiration_n and_o expiration_n of_o air_n both_o which_o be_v comprehend_v in_o 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d respiration_n be_v so_o necessary_a to_o life_n both_o naturalist_n and_o physician_n do_v so_o disagree_v that_o it_o will_v be_v very_o difficult_a either_o to_o reconcile_v their_o opinion_n or_o determine_v their_o controversy_n for_o first_o many_o there_o be_v who_o think_v the_o chief_a if_o not_o sole_a use_v of_o respiration_n to_o be_v the_o cooling_n and_o temper_v of_o that_o heat_n in_o the_o heart_n and_o blood_n which_o otherwise_o will_v be_v immoderate_a and_o this_o opinion_n not_o only_o seem_v to_o be_v most_o receive_v among_o scholastic_a writer_n but_o divers_a of_o the_o new_a philosopher_n cartesian_n and_o other_o admit_v with_o some_o variation_n teach_v that_o the_o air_n be_v necessary_a by_o its_o coldness_n to_o condense_a the_o blood_n that_o pass_v out_o of_o the_o right_a ventricle_n of_o the_o heart_n into_o the_o lung_n that_o thereby_o it_o may_v obtain_v such_o a_o consistence_n as_o be_v requisite_a to_o make_v it_o fit_a fuel_n for_o the_o vital_a fire_n or_o flame_n in_o the_o left_a ventricle_n of_o the_o heart_n and_o this_o opinion_n seem_v favour_v by_o this_o that_o fish_n and_o other_o cold_a creature_n who_o heart_n have_v but_o one_o cavity_n be_v also_o unprovided_a of_o lung_n and_o by_o some_o other_o consideration_n but_o though_o it_o need_v not_o be_v deny_v that_o the_o inspire_v air_n may_v sometime_o be_v of_o use_n by_o refrigerate_v the_o heart_n yet_o against_o the_o opinion_n that_o make_v this_o refrigeration_n the_o most_o genuine_a and_o constant_a use_n of_o the_o air_n it_o may_v be_v object_v that_o divers_a cold_a creature_n some_o of_o which_o as_o particular_o frog_n live_v in_o the_o water_n have_v yet_o need_v of_o respiration_n which_o seem_v not_o likely_a to_o be_v need_v for_o refrigeration_n by_o they_o that_o be_v destitute_a of_o any_o sensible_a heat_n and_o beside_o live_v in_o the_o cold_a water_n that_o even_o decrepit_a old_a man_n who_o natural_a heat_n be_v make_v very_o languid_a and_o almost_o extinguish_v by_o reason_n of_o age_n have_v yet_o a_o necessity_n of_o frequent_a respiration_n that_o a_o temperate_a air_n be_v fit_a for_o the_o generality_n of_o breathe_a creature_n and_o as_o a_o air_n too_o hot_a so_o also_o a_o air_n too_o cold_a may_v be_v inconvenient_a for_o they_o especial_o if_o they_o be_v trouble_v with_o a_o immoderate_a degree_n of_o the_o same_o quality_n which_o be_v predominant_a in_o the_o air_n that_o in_o some_o disease_n the_o natural_a heat_n be_v so_o weaken_a that_o in_o case_n the_o use_n of_o respiration_n be_v to_o cool_v it_o will_v be_v more_o hurtful_a than_o beneficial_a to_o breath_n and_o the_o suspending_a of_o the_o respiration_n may_v supply_v the_o place_n of_o those_o very_a hot_a medicine_n that_o be_v wont_a to_o be_v employ_v in_o such_o distemper_n that_o nature_n may_v much_o better_o have_v give_v the_o heart_n but_o a_o moderate_a heat_n than_o such_o a_o excessive_a one_o as_o needs_o to_o be_v perpetual_o cool_v to_o keep_v it_o from_o grow_v destructive_a which_o the_o gentle_a and_o not_o the_o burn_a heat_n of_o a_o animal_n heart_n seem_v not_o intense_a enough_o so_o indispensable_o to_o require_v these_o and_o other_o objection_n may_v be_v oppose_v and_o press_v against_o the_o recite_v opinion_n but_o we_o shall_v not_o insist_v on_o they_o but_o only_o add_v to_o they_o that_o it_o appear_v not_o by_o our_o forego_v experiment_n i_o mean_v the_o 38_o and_o 39_o that_o in_o our_o exhaust_a 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of_o the_o heart_n and_o lung_n be_v very_o far_o from_o be_v synchronical_a beside_o that_o the_o spirit_n seem_v to_o be_v but_o the_o most_o subtle_a and_o unctuous_a particle_n of_o the_o blood_n appear_v to_o be_v of_o a_o very_a differ_a nature_n from_o that_o of_o the_o lean_a and_o incombustible_a corpuscle_n of_o air._n other_o objection_n against_o this_o opinion_n have_v be_v propose_v and_o press_v by_o that_o excellent_a anatomist_n and_o my_o industrious_a friend_n dr._n highmore_n to_o who_o i_o shall_v therefore_o refer_v you_o another_o opinion_n there_o be_v touch_v respiration_n which_o make_v the_o genuine_a use_n of_o it_o to_o be_v ventilation_n not_o of_o the_o heart_n but_o of_o the_o blood_n in_o its_o passage_n through_o the_o lung_n in_o which_o passage_n it_o be_v disburden_v of_o those_o excrementitious_a steam_n proceed_v for_o the_o most_o part_n from_o the_o superfluous_a serosity_n of_o the_o blood_n we_o may_v add_v and_o of_o the_o chyle_n too_o which_o by_o those_o new_a conduit_n of_o late_a very_o happy_o detect_v by_o the_o famous_a pecquet_n have_v be_v new_o mix_v with_o it_o in_o the_o