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 on_o work_n 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 far_o and_o far_o into_o the_o bladder_n and_o by_o degree_n list_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 receiver_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 far_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 too_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 the_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 above_o mention_v 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 much_o more_o or_o less_o than_o one_o of_o the_o twenty_o six_o division_n this_o air_n take_v up_o by_o this_o mean_n after_o a_o trial_n or_o two_o we_o be_v enable_v to_o convey_v to_o the_o top_n of_o the_o glass_n a_o bubble_n of_o air_n equal_a enough_o as_o to_o sight_n to_o one_o of_o those_o division_n then_o the_o open_a end_n of_o the_o tube_n be_v put_v into_o a_o small_a viol_n who_o bottom_n be_v cover_v with_o water_n about_o half_a a_o inch_n high_a we_o include_v both_o glass_n into_o a_o small_a and_o slender_a receiver_n and_o cause_v the_o pump_n to_o be_v set_v on_o work_n the_o event_n be_v that_o at_o the_o first_o exsuction_n of_o the_o air_n there_o appear_v not_o any_o expansion_n of_o the_o bubble_n comparable_a to_o what_o appear_v at_o the_o second_o and_o that_o upon_o a_o very_a few_o exsuction_n the_o bubble_n reach_v as_o low_a as_o the_o surface_n of_o the_o subjacent_a water_n give_v we_o cause_n to_o think_v that_o if_o our_o pipe_n have_v not_o be_v break_v it_o will_v have_v expanded_a itself_o much_o far_o wherefore_o we_o take_v out_o the_o little_a tube_n and_o find_v that_o beside_o the_o twenty_o six_o division_n former_o mention_v the_o glass_n bubble_n and_o some_o part_n of_o the_o pipe_n to_o which_o the_o divide_a parchment_n do_v not_o reach_v amount_v to_o six_o division_n more_o whereby_o it_o appear_v that_o the_o air_n have_v take_v up_o one_o and_o thirty_o time_n as_o much_o room_n as_o before_o and_o yet_o seem_v capable_a of_o a_o much_o great_a expansion_n if_o the_o glass_n will_v have_v permit_v it_o wherefore_o after_o the_o former_a manner_n we_o let_v in_o another_o bubble_n that_o by_o our_o guess_n be_v but_o half_a as_o big_a as_o the_o former_a and_o find_v that_o upon_o the_o exsuction_n of_o the_o air_n from_o the_o receiver_n this_o little_a bubble_n do_v not_o only_o fill_v up_o the_o whole_a tube_n but_o in_o part_n break_v through_o the_o subjacent_a water_n in_o the_o viol_n and_o thereby_o manifest_v itself_o to_o have_v prossess_v sixty_o and_o odd_a time_n its_o former_a room_n these_o two_o experiment_n be_v mention_v to_o make_v way_n for_o the_o more_o easy_a belief_n of_o that_o which_o be_v now_o to_o follow_v find_v then_o that_o our_o tube_n be_v too_o short_a to_o serve_v our_o turn_n we_o take_v a_o slender_a quill_n of_o glass_n which_o happen_v to_o be_v at_o hand_n though_o it_o be_v not_o so_o fit_a for_o our_o purpose_n as_o we_o can_v have_v wish_v in_o regard_n it_o be_v three_o or_o four_o time_n as_o big_a at_o one_o end_n as_o the_o other_o this_o pipe_n which_o be_v thirty_o inch_n long_o be_v hermetical_o seal_v at_o the_o slender_a end_n be_v almost_o fill_v with_o water_n and_o after_o the_o above-related_n manner_n a_o bubble_n be_v convey_v to_o the_o top_n of_o it_o and_o the_o open_a extreme_a be_v put_v into_o a_o viol_n that_o have_v a_o little_a fair_a water_n at_o the_o bottom_n then_o the_o cover_v by_o mean_n of_o a_o small_a hole_n purposely_o make_v in_o it_o for_o the_o glass_n pipe_n to_o stand_v out_o at_o be_v cement_v on_o to_o the_o receiver_n and_o the_o pump_n be_v set_v on_o work_n after_o some_o exsuction_n not_o only_o the_o air_n manifest_o appear_v extend_v below_o the_o surface_n of_o the_o subjacent_a water_n but_o one_o of_o the_o bystander_n affirm_v that_o he_o see_v some_o bubble_n come_v out_o at_o the_o bottom_n of_o the_o pipe_n and_o break_v through_o the_o water_n this_o do_v we_o leave_v off_o pump_v and_o observe_v how_o at_o the_o unperceived_a leak_n of_o the_o receiver_n the_o air_n get_v in_o so_o fast_o that_o it_o very_o quick_o impel_v up_o the_o water_n to_o the_o top_n of_o the_o tube_n except_v a_o little_a space_n whereinto_o that_o bubble_n be_v repulse_v which_o have_v so_o late_o possess_v the_o whole_a tube_n this_o air_n at_o the_o slender_a end_n appear_v to_o be_v a_o cylinder_n of_o â…š_n part_n of_o a_o inch_n in_o length_n but_o when_o the_o pipe_n be_v take_v out_o and_o turn_v upside_o down_o it_o appear_v at_o the_o other_o end_n inferior_a in_o bulck_n to_o a_o pea._n these_o thing_n be_v thus_o do_v we_o take_v to_o make_v the_o experiment_n the_o more_o exact_o a_o small_a pair_n of_o
to_o agree_v well_o enough_o with_o mr._n townley_n theory_n and_o so_o do_v as_o their_o author_n be_v please_v to_o tell_v i_o some_o trial_n make_v about_o the_o same_o time_n by_o that_o noble_a virtuoso_fw-la and_o eminent_a mathematician_n the_o lord_n brouncker_fw-ge from_o who_o further_a inquiry_n into_o this_o matter_n if_o his_o occasion_n will_v allow_v he_o to_o make_v they_o the_o curious_a may_v well_o hope_v for_o something_o very_o accurate_a a_o table_n of_o the_o rarefaction_n of_o the_o air._n a_o b_o c_o d_o e_o 1_o 00_o 0_o 0_o subtract_v from_o 29¾_n leave_v 29¾_n 29¾_n 1_o ½_o 10_o â…_n 19_o â…›_n 19_o â…š_n 2_o 15_o â…œ_n 14_o â…œ_n 14_o â…ž_n 3_o 20_o 2_o 8_o 9_o 4_o 8_o 9_o 15_o 12_o 4_o 22_o â…_n 7_o â…›_n 7_o 7_o 16_o 5_o 24_o â…›_n 5_o â…_n 5_o 19_o 20_o 6_o 24_o â…ž_n 4_o â…ž_n 4_o 23_o 24_o 7_o 25_o 4_o 8_o 4_o 2_o 8_o 4_o ¼_n 8_o 26_o 0_o 0_o 3_o 6_o 8_o 3_o 23_o 32_o 9_o 26_o â…œ_n 3_o â…œ_n 3_o 11_o 36_o 10_o 26_o 6_o 8_o 3_o 0_o 0_o 2_o 39_o 40_o 12_o 27_o â…›_n 2_o â…_n 2_o 23_o 48_o 14_o 27_o 4_o 8_o 2_o 2_o 8_o 2_o â…›_n 16_o 27_o 6_o 8_o 2_o 0_o 0_o 1_o 55_o 64_o 18_o 27_o â…ž_n 1_o â…ž_n 1_o 47_o 72_o 20_o 28_n 1_o 6_o 8_o 1_o 9_o 80_o 24_o 28_o 2_o 8_o 1_o 4_o 8_o 1_o 23_o 96_o 28_o 28_o â…œ_n 1_o â…œ_n 1_o 1_o 16_o 32_o 28_o 4_o 8_o 1_o 2_o 8_o 0_o 119_o 128_o a._n the_o number_n of_o equal_a space_n at_o the_o top_n of_o the_o tube_n that_o contain_v the_o same_o parcel_n of_o air._n b._n the_o height_n of_o the_o mercurial_a cylinder_n that_o together_o with_o the_o spring_n of_o the_o include_v air_n counterbalance_v the_o pressure_n of_o the_o atmosphere_n c._n the_o pressure_n of_o the_o atmosphere_n d._n the_o compliment_n of_o b_o to_z c_z exhibit_v the_o pressure_n sustain_v by_o the_o include_v air._n e._n what_o that_o pressure_n shall_v be_v according_a to_o the_o hypothesis_n to_o make_v the_o experiment_n of_o the_o debilitate_a force_n of_o expanded_a air_n the_o plain_a it_o will_v not_o be_v amiss_o to_o note_v some_o particular_n especial_o touch_v the_o manner_n of_o make_v the_o trial_n which_o for_o the_o reason_n late_o mention_v we_o make_v on_o a_o lightsome_a pair_n of_o stair_n and_o with_o a_o box_n also_o line_v with_o paper_n to_o receive_v the_o mercury_n that_o may_v be_v spill_v and_o in_o regard_n it_o will_v require_v a_o vast_a and_o in_o few_o place_n procurable_a quantity_n of_o quicksilver_n to_o employ_v vessel_n of_o such_o kind_a as_o be_v ordinary_a in_o the_o torricellian_a experiment_n we_o make_v use_v of_o a_o glass-tube_n of_o about_o six_o foot_n long_o for_o that_o be_v hermetical_o seal_v at_o one_o end_n serve_v out_o turn_v as_o well_o as_o if_o we_o can_v have_v make_v the_o experiment_n in_o a_o tub_n or_o pond_n of_o seventy_o inch_n deep_a second_o we_o also_o provide_v a_o slender_a glass-pipe_n of_o about_o the_o bigness_n of_o a_o swan_n quill_n and_o open_a at_o both_o end_n all_o along_o which_o be_v past_v a_o narrow_a list_n of_o paper_n divide_v into_o inch_n and_o half_a quarter_n three_o this_o slender_a pipe_n be_v thrust_v down_o into_o the_o great_a tube_n almost_o fill_v with_o quicksilver_n the_o glass_n help_v to_o make_v it_o swell_v to_o the_o top_n of_o the_o tube_n and_o the_o quicksilver_n get_v in_o at_o the_o low_a orifice_n of_o the_o pipe_n fill_v it_o up_o till_o the_o mercury_n include_v in_o that_o be_v near_o about_o a_o level_n with_o the_o surface_n of_o the_o surround_v mercury_n in_o the_o tube_n four_o there_o be_v as_o near_o as_o we_o can_v guess_v little_o more_o than_o a_o inch_n of_o the_o slender_a pipe_n leave_v above_o the_o surface_n of_o the_o restagnant_fw-la mercury_n and_o consequent_o unfilled_a therewith_o the_o prominent_a orifice_n be_v careful_o close_v with_o seal_v wax_n melt_v after_o which_o the_o pipe_n be_v let_v alone_o for_o a_o while_n that_o the_o air_n dilate_v a_o little_a by_o the_o heat_n of_o the_o wax_n may_v upon_o refrigeration_n be_v reduce_v to_o its_o wont_a density_n and_o then_o we_o observe_v by_o the_o help_n of_o the_o abovementioned_a list_v of_o paper_n whether_o we_o have_v not_o include_v somewhat_o more_o or_o somewhat_o less_o than_o a_o inch_n of_o air_n and_o in_o either_o case_n we_o be_v fain_o to_o rectify_v the_o error_n by_o a_o small_a hole_n make_v with_o a_o heat_a pin_n in_o the_o wax_n and_o afterward_o close_v up_o again_o five_o have_v thus_o include_v a_o just_a inch_n of_o air_n we_o lift_v up_o the_o slender_a pipe_n by_o degree_n till_o the_o air_n be_v dilate_v to_o a_o inch_n a_o inch_n and_o a_o half_a two_o inch_n etc._n etc._n and_o observe_v in_o inches_n and_o eighth_n the_o length_n of_o the_o mercurial_a cylinder_n which_o at_o each_o degree_n of_o the_o air_n be_v expansion_n be_v impel_v above_o the_o surface_n of_o the_o restagnant_fw-la mercury_n in_o the_o tube_n six_o the_o observation_n be_v end_v we_o present_o make_v the_o torricellian_a experiment_n with_o the_o abovementioned_a great_a tube_n of_o six_o foot_n long_o that_o we_o may_v know_v the_o height_n of_o the_o mercurial_a cylinder_n for_o that_o particular_a day_n and_o hour_n which_o height_n we_o find_v to_o be_v 29¾_n inches_n seven_o our_o observation_n make_v after_o this_o manner_n furnish_v we_o with_o the_o precede_a table_n in_o which_o there_o will_v not_o probable_o have_v be_v find_v the_o difference_n here_o set_v down_o betwixt_o the_o force_n of_o the_o air_n when_o expanded_a to_o double_v its_o former_a dimension_n and_o what_o that_o force_n shall_v have_v be_v precise_o according_a to_o the_o theory_n but_o that_o the_o include_v inch_n of_o air_n receive_v some_o little_a accession_n during_o the_o trial_n which_o this_o newly-mentioned_a difference_n make_v we_o suspect_v we_o find_v by_o replung_v the_o pipe_n into_o the_o quicksilver_n that_o the_o include_v air_n have_v gain_v about_o half_a a_o eight_o which_o we_o guest_n to_o have_v come_v from_o some_o little_a aëreal_a bubble_n in_o the_o quicksilver_n contain_v in_o the_o pipe_n so_o easy_a be_v it_o in_o such_o nice_a experiment_n to_o miss_v of_o exactness_n we_o try_v also_o with_o 12_o inch_n of_o air_n shut_v up_o to_o be_v dilate_v but_o be_v then_o hinder_v by_o some_o unwelcome_a avocation_n to_o prosecute_v those_o experiment_n we_o shall_v elsewhere_o out_o of_o other_o note_n and_o trial_n god_n permit_v set_v down_o some_o other_o accurate_a table_n concern_v this_o matter_n by_o which_o possible_o we_o may_v be_v assist_v to_o resolve_v whether_o the_o atmosphere_n shall_v be_v look_v upon_o as_o it_o usual_o be_v as_o a_o limit_a and_o bound_a portion_n of_o the_o air_n or_o whether_o we_o shall_v in_o a_o strict_a sense_n than_o we_o do_v before_o use_v the_o atmosphere_n and_o aëreal_a part_n of_o the_o world_n for_o almost_o equivalent_a term_n or_o else_o whether_o we_o shall_v allow_v the_o word_n atmosphere_n some_o other_o notion_n in_o relation_n to_o its_o extent_n and_o limit_n for_o as_o to_o its_o spring_n and_o weight_n these_o experiment_n do_v not_o question_v but_o evince_v they_o but_o we_o be_v willing_a as_o we_o say_v to_o refer_v these_o matter_n to_o our_o appendix_n and_o till_o then_o to_o retain_v our_o wont_a manner_n of_o speak_v of_o the_o air_n and_o atmosphere_n in_o the_o mean_a time_n to_o return_v to_o our_o last-mentioned_a experiment_n beside_o that_o so_o little_a a_o variation_n may_v be_v in_o great_a part_n impute_v to_o the_o difficulty_n of_o make_v experiment_n of_o this_o nature_n exact_o and_o perhaps_o a_o good_a part_n of_o it_o to_o something_o of_o inequality_n in_o the_o cavity_n of_o the_o pipe_n or_o even_o in_o the_o thickness_n of_o the_o glass_n beside_o this_o i_o say_v the_o proportion_n betwixt_o the_o several_a pressure_n of_o the_o include_v air_n undilate_v and_o expanded_a especial_o when_o the_o dilatation_n be_v great_a for_o when_o the_o air_n swell_v but_o to_o four_o time_n its_o first_o extent_n the_o mercurial_a cylinder_n though_o of_o near_o 23_o inch_n differ_v not_o a_o quarter_n of_o a_o inch_n from_o what_o it_o shall_v have_v be_v according_a to_o mathematical_a exactness_n the_o proportion_n i_o say_v be_v suitable_a enough_o to_o what_o may_v be_v expect_v to_o allow_v we_o to_o make_v this_o reflection_n upon_o the_o whole_a that_o whether_o or_o no_o the_o intimate_v theory_n will_v hold_v exact_o for_o about_o that_o as_o i_o say_v above_o i_o dare_v determine_v nothing_o resolute_o till_o i_o have_v further_o consider_v the_o matter_n yet_o since_o the_o inch_n of_o air_n when_o it_o be_v first_o include_v be_v shut_v up_o with_o no_o other_o pressure_n than_o that_o
therefore_o do_v in_o the_o allege_a case_n descend_v because_o it_o be_v thrust_v down_o by_o that_o parcel_n of_o air_n which_o dilate_v its_o self_n by_o its_o own_o spring_n ibid._n sic_fw-la deberet_fw-la etc._n etc._n so_o shall_v the_o finger_n be_v rather_o thrust_v from_o the_o top_n of_o the_o tube_n than_o thereby_o fasten_v to_o it_o because_o this_o dilatation_n must_v be_v make_v as_o well_o upward_o as_o downward_o p._n 6._o concipi_fw-la etc._n etc._n it_o can_v be_v conceive_v how_o that_o air_n shall_v dilate_v itself_o or_o thrust_v down_o the_o mercury_n unless_o by_o take_v up_o a_o great_a place_n which_o thing_n these_o author_n be_v much_o against_o assert_v that_o rarefaction_n can_v be_v make_v no_o otherway_n than_o by_o corpuscle_n or_o vacuity_n chap._n 3._o p._n 7._o si_fw-mi etc._n etc._n if_o you_o take_v a_o tube_n open_a at_o both_o end_n of_o a_o good_a length_n suppose_v forty_o inch_n long_o and_o fill_v it_o with_o mercury_n and_o place_v your_o finger_n on_o the_o top_n as_o before_o take_v away_o your_o low_a finger_n you_o will_v find_v the_o mercury_n to_o descend_v even_o to_o its_o wont_a station_n and_o your_o finger_n on_o the_o top_n to_o be_v strong_o draw_v within_o the_o tube_n and_o to_o stick_v close_o unto_o it_o whence_o again_o it_o be_v evident_o conclude_v that_o the_o mercury_n place_v in_o its_o own_o station_n be_v not_o there_o uphold_v by_o the_o external_a air_n but_o suspend_v by_o a_o certain_a internal_a cord_n who_o upper_a end_n be_v fasten_v to_o the_o finger_n draw_v and_o fasten_v it_o after_o this_o manner_n into_o the_o tube_n chap._n 4._o p._n 8._o sumatur_fw-la etc._n etc._n take_v a_o tube_n short_a than_o twenty_o nine_o inch_n and_o a_o half_a for_o instance_n of_o twenty_o digit_n not_o shut_v as_o hitherto_o at_o one_o end_n but_o with_o both_o end_n open_a let_v this_o tube_n its_o orifice_n be_v immerse_v in_o restagnant_fw-la mercury_n and_o one_o finger_n be_v place_v underneath_o that_o the_o mercury_n to_o be_v pour_v in_o run_v not_o through_o be_v fill_v with_o mercury_n and_o then_o another_o finger_n be_v apply_v to_o its_o orifice_n to_o close_v it_o well_o which_o be_v do_v if_o you_o draw_v away_o your_o low_a finger_n the_o upper_a will_v be_v find_v to_o be_v strong_o draw_v and_o suck_v into_o the_o tube_n and_o so_o stiff_o to_o adhere_v to_o it_o or_o rather_o to_o the_o quicksilver_n as_o i_o shall_v hereafter_o show_v that_o it_o will_v elevate_v the_o tube_n itself_o with_o all_o the_o quicksilver_n and_o make_v it_o continue_v to_o hang_v pendulous_a in_o the_o vessel_n from_o which_o experiment_n this_o opinion_n be_v most_o clear_o refute_v for_o see_v according_a to_o it_o the_o quicksilver_n in_o such_o a_o tube_n but_o twenty_o inch_n long_o must_v be_v thrust_v upward_o by_o the_o preponderate_a air_n it_o will_v never_o by_o it_o be_v explain_v how_o this_o finger_n be_v so_o draw_v downward_o and_o make_v so_o strong_o to_o stick_v to_o the_o tube_n for_o it_o can_v by_o the_o air_n thrust_v upward_o be_v thus_o draw_v downward_o p._n 10_o 11._o quod_fw-la vel_fw-la etc._n etc._n which_o be_v thence_o confirm_v because_o if_o that_o preponderate_a air_n succeed_v as_o be_v assert_v in_o the_o place_n of_o the_o low_a finger_n which_o be_v withdraw_v that_o be_v if_o it_o uphold_v the_o quicksilver_n after_o the_o same_o manner_n which_o it_o be_v uphold_v by_o the_o low_a finger_n apply_v under_o it_o it_o be_v manifest_a according_a to_o this_o opinion_n that_o the_o finger_n on_o the_o top_n ought_v not_o to_o be_v more_o draw_v downward_o after_o the_o low_a finger_n be_v remove_v than_o before_o see_v then_o that_o experience_n teach_v the_o contrary_a it_o be_v manifest_v that_o opinion_n must_v be_v false_a chap._n 5._o p._n 11_o 12._o quarto_fw-la etc._n etc._n in_o the_o four_o place_n it_o be_v impugned_a because_o thence_o it_o will_v follow_v that_o quicksilver_n through_o a_o like_a tube_n may_v be_v suck_v with_o the_o same_o easiness_n out_o of_o a_o vessel_n that_o water_n be_v suck_v out_o of_o the_o same_o which_o notwithstanding_o be_v contrary_n to_o experience_n by_o which_o we_o be_v teach_v that_o water_n be_v easy_o draw_v into_o the_o mouth_n of_o he_o that_o suck_v whereas_o quicksilver_n can_v be_v draw_v thither_o by_o his_o utmost_a endeavour_n nay_o scarce_o unto_o the_o middle_n of_o the_o tube_n the_o sequel_n i_o thus_o manifest_a because_o see_v according_a to_o this_o opinion_n that_o the_o liquor_n underneath_o whether_o it_o be_v water_n or_o mercury_n may_v so_o ascend_v no_o more_o be_v require_v but_o that_o the_o air_n shut_v in_o the_o tube_n may_v be_v draw_v upward_o by_o suck_v which_o be_v draw_v up_o the_o liquor_n underneath_o will_n immediate_o ascend_v be_v thrust_v thither_o by_o the_o external_a air_n now_o preponderate_v as_o pecquet_n declare_v in_o his_o anatomical_a discourse_n p._n 63._o it_o be_v manifest_a that_o the_o mercury_n may_v be_v suck_v out_o with_o the_o same_o easiness_n that_o water_n be_v suck_v out_o with_o which_o be_v so_o evident_o against_o experience_n the_o opinion_n from_o whence_o it_o be_v deduce_v must_v needs_o be_v false_a p._n 13._o neque_fw-la hoc_fw-la etc._n etc._n and_o not_o only_o this_o but_o over_o and_o above_o if_o a_o glass_n diabetes_n or_o syringe_n be_v make_v of_o a_o sufficient_a length_n and_o after_o that_o the_o sucker_n be_v thrust_v into_o the_o utmost_a orifice_n it_o be_v place_v according_a to_o use_v in_o the_o mercury_n underneath_o he_o find_v that_o as_o soon_o as_o the_o sucker_n be_v draw_v out_o the_o mercury_n follow_v and_o ascend_v to_o the_o same_o height_n of_o two_o foot_n and_o three_o inch_n and_o a_o half_a and_o when_o afterward_o although_o no_o great_a force_n be_v add_v the_o sucker_n be_v draw_v high_o he_o find_v that_o the_o mercury_n stand_v and_o follow_v no_o further_o and_o so_o that_o space_n be_v make_v empty_a which_o remain_v between_o the_o mercury_n and_o the_o sucker_n p._n 15._o maneat_fw-la igitur_fw-la etc._n etc._n be_v it_o therefore_o confirm_v by_o so_o many_o argument_n of_o which_o every_o one_o be_v sufficient_a in_o itself_o that_o quicksilver_n the_o experiment_n be_v make_v in_o a_o open_a place_n be_v not_o uphold_v from_o fall_v by_o the_o weight_n of_o the_o external_a air._n cap._n 6._o ibid._n argentum_fw-la etc._n etc._n that_o quicksilver_n in_o a_o close_a place_n be_v not_o uphold_v from_o fall_v by_o the_o elater_n or_o spring_n of_o the_o air._n ibid._n cum_fw-la tota_fw-la etc._n etc._n see_v the_o whole_a power_n of_o this_o spring_n depend_v upon_o the_o already-confuted_n aequilibrium_fw-la of_o the_o air_n with_o 29_o inch_n and_o a_o half_a of_o quicksilver_n so_o that_o this_o spring_n do_v neither_o more_o nor_o less_o in_o a_o close_a place_n than_o be_v do_v by_o that_o aequilibrium_fw-la in_o a_o open_a place_n it_o be_v manifest_a see_v this_o aequilibrium_fw-la be_v already_o show_v to_o be_v plain_o fictitious_a and_o imaginary_a that_o the_o spring_n of_o the_o air_n be_v so_o likewise_o p._n 16._o nec_fw-la plus_fw-la etc._n etc._n and_o that_o this_o spring_n do_v neither_o more_o nor_o less_o in_o a_o close_a place_n than_o be_v do_v by_o that_o aequilibrium_fw-la in_o a_o open_a place_n ibid._n add_v etc._n etc._n add_v that_o see_v the_o experiment_n bring_v in_o the_o chapter_n above_o of_o the_o adhesion_n of_o the_o finger_n etc._n etc._n be_v alike_o in_o a_o close_a and_o a_o open_a place_n it_o be_v necessary_a and_o certain_a that_o the_o same_o argument_n make_v against_o the_o aequilibrium_fw-la have_v force_n against_o the_o spring_n of_o the_o air._n p._n 17._o et_fw-la profecto_fw-la etc._n etc._n and_o real_o if_o these_o author_n will_v consider_v how_o great_a a_o difficulty_n there_o be_v in_o explain_v this_o spring_n of_o the_o air_n unless_o the_o same_o air_n by_o itself_o alone_o may_v take_v up_o a_o great_a place_n i_o believe_v they_o will_v ready_o alter_v their_o opinion_n part_n 2._o chap._n 1._o p._n 19_o constet_fw-la hoc_fw-la etc._n etc._n this_o appear_v from_o what_o have_v be_v already_o speak_v in_o the_o precede_a chapter_n for_o the_o quicksilver_n descend_v can_v so_o draw_v the_o finger_n downward_o and_o fasten_v it_o unto_o the_o tube_n unless_o it_o be_v hang_v upon_o the_o finger_n by_o such_o a_o cord_n which_o by_o its_o weight_n it_o vehement_o stretch_v as_o be_v manifest_a by_o itself_o ibid._n respondeo_fw-la etc._n etc._n i_o answer_v that_o this_o come_v to_o pass_v that_o there_o may_v be_v no_o vaculty_n see_v there_o be_v nothing_o else_o there_o that_o can_v succeed_v into_o the_o place_n of_o the_o descend_a quicksilver_n ibid._n and_o hence_o be_v confirm_v that_o common_a axiom_n use_v in_o the_o school_n for_o so_o many_o age_n past_a that_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 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
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climate_n yet_o we_o can_v not_o believe_v that_o that_o difference_n in_o the_o air_n shall_v alone_o be_v able_a to_o make_v so_o great_a a_o one_o in_o the_o height_n of_o the_o mercurial_a cylinder_n and_o according_o upon_o enquiry_n we_o find_v that_o though_o the_o various_a density_n of_o the_o air_n be_v not_o to_o be_v over-looked_n in_o this_o experiment_n yet_o the_o main_a reason_n why_o we_o find_v the_o cylinder_n of_o mercury_n to_o consist_v of_o so_o many_o inch_n be_v this_o that_o our_o english_a inch_n be_v somewhat_o inferior_a in_o length_n to_o the_o digit_n make_v use_v of_o in_o foreign_a part_n by_o the_o writer_n of_o the_o experiment_n the_o next_o thing_n i_o desire_v your_o lordship_n to_o take_v notice_n of_o be_v that_o the_o height_n of_o the_o mercurial_a cylinder_n be_v not_o wont_a to_o be_v find_v altogether_o so_o great_a as_o real_o it_o may_v prove_v by_o reason_n of_o the_o negligence_n or_o incogitancy_n of_o most_o that_o make_v the_o 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answer_v that_o of_o those_o which_o be_v easy_o intelligible_a without_o ocular_a demonstration_n we_o can_v at_o present_a suggest_v upon_o our_o own_o trial_n no_o better_a than_o these_o first_o at_o the_o open_a end_n of_o the_o tube_n the_o glass_n must_v not_o only_o be_v make_v as_o even_o at_o the_o edge_n as_o you_o can_v but_o it_o be_v very_o convenient_a especial_o if_o the_o tube_n be_v large_a that_o 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 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 beglean_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 the_o small_a latitant_fw-la bubble_n of_o air_n to_o disclose_v themselves_o and_o break_v by_o employ_v a_o hot_a iron_n in_o such_o manner_n as_o we_o late_o mention_v i_o remember_v that_o by_o careful_o fill_v the_o tube_n though_o yet_o it_o be_v not_o quite_o free_a from_o air_n we_o have_v make_v the_o mercurial_a cylinder_n reach_n to_o 30_o inch_n and_o above_o a_o eight_o and_o this_o in_o a_o very_a short_a tube_n which_o we_o therefore_o mention_v because_o we_o have_v find_v by_o experience_n that_o in_o short_a tube_n a_o little_a air_n be_v more_o 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which_o i_o remember_v i_o have_v somewhere_o read_v in_o a_o book_n of_o the_o ingenious_a kircherus_n who_o give_v a_o pertinent_a admonition_n concern_v the_o various_a refraction_n that_o may_v happen_v in_o the_o air_n relate_v that_o during_o his_o stay_n in_o malta_n he_o often_o see_v mount_n aetna_n though_o the_o next_o day_n notwithstanding_o its_o be_v extreme_o clear_a he_o can_v not_o see_v it_o add_v that_o vintemillius_fw-la a_o very_a learned_a person_n do_v oftentimes_o from_o a_o hill_n he_o name_v behold_v the_o whole_a island_n he_o call_v luprica_fw-la protuberant_a above_o the_o sea_n though_o at_o other_o time_n notwithstanding_o a_o clear_a sky_n he_o can_v not_o see_v it_o and_o though_o perhaps_o this_o may_v be_v in_o part_n ascribe_v to_o the_o various_a light_n and_o position_n of_o the_o sun_n or_o to_o the_o various_a disposition_n of_o the_o spectator_n eye_n or_o peradventure_o to_o some_o other_o cause_n yet_o the_o most_o probable_a cause_n seem_v 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and_o thick_a that_o it_o will_v oftentimes_o put_v out_o their_o very_a candle_n if_o they_o do_v not_o seasonable_o prevent_v it_o and_o i_o think_v it_o will_v easy_o be_v grant_v that_o the_o ascension_n of_o such_o steam_n into_o this_o or_o that_o part_n of_o the_o air_n and_o their_o mix_n with_o it_o be_v very_o like_a to_o thicken_v it_o as_o on_o the_o other_o side_n either_o heat_n or_o the_o sudden_a condensation_n of_o the_o air_n in_o another_o part_n of_o the_o atmosphere_n to_o mention_v now_o no_o other_o cause_n be_v capable_a of_o rarefy_v it_o nor_o will_v it_o very_o much_o import_v the_o main_a scope_n of_o our_o discourse_n whether_o it_o be_v suppose_v that_o the_o copious_a steam_n the_o earth_n send_v into_o the_o air_n thicken_v that_o part_n of_o the_o atmosphere_n that_o receive_v they_o and_o make_v it_o more_o heavy_a or_o that_o sometime_o the_o fume_n may_v ascend_v with_o such_o celerity_n that_o though_o the_o air_n be_v thicken_v yet_o they_o 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tube_n above_o the_o wont_a height_n of_o betwixt_o six_o and_o seven_o and_o twenty_o digit_n and_o if_o to_o these_o thing_n we_o annex_v that_o for_o aught_o we_o can_v find_v by_o trial_n purposely_o make_v the_o degree_n of_o rarity_n or_o density_n of_o the_o air_n shut_v up_o into_o our_o receiver_n do_v not_o sensible_o alter_v its_o temperature_n as_o to_o cold_a or_o heat_n it_o will_v not_o i_o hope_v appear_v absurd_a to_o conceive_v that_o since_o the_o air_n include_v in_o the_o tube_n can_v but_o very_o saintly_o hinder_v the_o ascent_n of_o the_o quicksilver_n or_o press_v it_o downward_o since_o too_o that_o include_v air_n can_v scarce_o immediate_o receive_v any_o sensible_a alteration_n save_o either_o by_o heat_n or_o cold_a and_o since_o also_o that_o according_a to_o the_o bare_a density_n or_o rarity_n of_o the_o air_n incumbent_a on_o the_o subjacent_a quicksilver_n in_o the_o vessel_n that_o in_o the_o tube_n be_v impel_v more_o or_o less_o high_a such_o 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draw_n of_o the_o air_n out_o of_o the_o receiver_n the_o mercury_n will_v descend_v in_o a_o tube_n short_a than_o six_o and_o twenty_o digit_n induce_v we_o also_o to_o expect_v that_o by_o the_o same_o mean_n water_n may_v be_v bring_v to_o subside_v in_o glass_n tubes_fw-la of_o a_o moderate_a length_n though_o by_o the_o noble_a experiment_n say_v to_o have_v be_v accurate_o make_v in_o france_n by_o mounseur_fw-fr paschal_n we_o be_v inform_v that_o a_o tube_n of_o no_o less_o than_o about_o two_o and_o thirty_o foot_n be_v find_v requisite_a to_o make_v the_o experiment_n de_fw-fr vacuo_fw-la succeed_v with_o water_n instead_o of_o quicksilver_n so_o tall_a a_o cylinder_n of_o that_o light_a liquor_n be_v it_o seem_v requisite_a to_o equal_v the_o weight_n of_o a_o mercurial_a cylinder_n of_o six_o or_o seven_o and_o twenty_o digit_n and_o surmount_v the_o pressure_n of_o the_o atmosphere_n we_o take_v then_o a_o tube_n of_o glass_n hermetical_o seal_v at_o one_o end_n of_o 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the_o bladder_n from_o swim_v and_o no_o more_o for_o i_o suppose_v that_o if_o when_o all_o thing_n be_v thus_o order_v the_o receiver_n be_v empty_v in_o case_n there_o be_v any_o such_o pressure_n of_o the_o atmosphere_n upon_o water_n as_o i_o be_v incline_v to_o believe_v the_o air_n within_o the_o bladder_n be_v upon_o the_o exsuction_n of_o the_o air_n within_o the_o receiver_n free_v from_o that_o pressure_n and_o be_v press_v only_o by_o the_o small_a weight_n of_o the_o incumbent_a water_n will_v considerable_o expand_v itself_o but_o whilst_o we_o be_v prepare_v bladder_n for_o this_o experiment_n there_o occur_v a_o easy_a way_n for_o the_o make_n at_o once_o both_o the_o discovery_n i_o desire_v we_o take_v then_o a_o glass_n viol._n contain_v by_o guess_v a_o pound_n and_o some_o ounce_n of_o water_n this_o we_o fill_v top_n full_a and_o then_o we_o put_v into_o the_o neck_n of_o it_o a_o glass_n pipe_v a_o pretty_a deal_n big_a than_o a_o goose_n quill_n open_a at_o 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to_o be_v mention_v which_o be_v no_o less_o than_o those_o already_o recite_v pertinent_a to_o our_o present_a purpose_n in_o the_o first_o place_n then_o when_o the_o great_a part_n of_o the_o air_n have_v be_v pump_v out_o of_o the_o receiver_n the_o rise_a bubble_n ascend_v so_o very_o slow_o in_o the_o pipe_n that_o their_o progress_n be_v scarce_o discernible_a which_o seem_v to_o proceed_v from_o this_o that_o their_o bigness_n be_v such_o that_o they_o can_v not_o sufficient_o extend_v themselves_o in_o the_o cavity_n of_o the_o glass_n without_o press_v on_o both_o hand_n against_o the_o side_n of_o it_o whereby_o they_o become_v of_o more_o difficult_a extrusion_n to_o the_o water_n and_o though_o it_o may_v seem_v strange_a that_o these_o bubble_n shall_v be_v of_o any_o considerable_a bulk_n since_o it_o be_v like_a they_o consist_v of_o lesser_a parcel_n of_o the_o air_n lurk_v in_o the_o water_n than_o those_o that_o be_v vigorous_a enough_o to_o make_v their_o way_n 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shall_v add_v the_o three_o follow_v particular_n first_o that_o in_o a_o engine_n so_o contrive_v that_o the_o pump_n lie_v cover_v with_o water_n when_o the_o sucker_n be_v retract_v the_o atmosphere_n will_v strong_o press_v the_o water_n against_o it_o and_o if_o the_o manubrium_fw-la be_v let_v go_v will_v swift_o enough_o repel_v up_o the_o sucker_n into_o the_o desert_a
his_o explication_n and_o i_o be_o not_o oblige_v to_o do_v so_o i_o shall_v only_o take_v notice_n of_o what_o our_o author_n object_n to_o prove_v that_o this_o phaenomenon_n can_v be_v solve_v by_o the_o spring_n of_o the_o air_n in_o these_o word_n b._n curio_n non_fw-la potest_fw-la aqua_fw-la quae_fw-la cum_fw-la injiceretur_fw-la particulas_fw-la aëris_fw-la comprimebat_fw-la ab_fw-la iisdem_fw-la particulis_fw-la se_fw-la explicantibus_fw-la 24._o rursus_fw-la rejici_fw-la a._n quia_fw-la locum_fw-la explicatae_fw-la majorem_fw-la non_fw-la requirunt_fw-la quam_fw-la compressae_fw-la quemadmodum_fw-la in_o vase_n aqua_fw-la pleno_fw-la in_fw-la qua_fw-la esset_fw-la multitudo_fw-la anguillarum_fw-la anguillas_fw-la sive_fw-la in_o se_fw-la volutas_fw-la sive_fw-la explicatas_fw-la idem_fw-la semper_fw-la capit_fw-la locum_fw-la propellere_fw-la ergo_fw-la aquam_fw-la per_fw-la vim_o elasticam_fw-la quae_fw-la alia_fw-la non_fw-la est_fw-la quam_fw-la motus_fw-la corporum_fw-la se_fw-la explicantium_fw-la non_fw-la possunt_fw-la b._n comparatio_fw-la illa_fw-la aëris_fw-la cum_fw-la aqua_fw-la anguillis_fw-la plena_fw-la nostris_fw-la credo_fw-la non_fw-la displicebit_fw-la but_o the_o elaterist_n will_v answer_v that_o neither_o can_v his_o earthly_a atom_n to_o who_o he_o ascribe_v the_o rejection_n of_o the_o water_n force_v in_o true_o fill_v up_o more_o part_n of_o space_n at_o one_o time_n than_o at_o another_o and_o therefore_o the_o objection_n may_v have_v be_v spare_v but_o indeed_o it_o reach_v we_o not_o for_o we_o as_o mr._n hobbs_n know_v well_o be_v not_o wont_a to_o compare_v the_o air_n to_o eel_n but_o to_o wool_n and_o though_o each_o hair_n that_o make_v up_o a_o compress_v lock_n of_o wool_n do_v not_o real_o fill_v more_o space_n with_o wool_n when_o extend_v than_o when_o crumple_v yet_o when_o there_o be_v a_o congery_n of_o these_o hair_n compress_v together_o the_o whole_a fleece_n or_o congery_n do_v by_o its_o spring_n endeavour_v 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i_o think_v i_o can_v easy_o enough_o do_v it_o especial_o since_o he_o rather_o excuse_v those_o that_o may_v have_v negligent_o express_v themselves_o than_o disprove_v what_o i_o say_v and_o since_o i_o speak_v chief_o and_o by_o name_n of_o the_o peripatetic_a school_n he_o may_v well_o allow_v that_o their_o expression_n concern_v this_o matter_n be_v not_o always_o so_o accurate_a whilst_o in_o this_o very_a passage_n he_o conclude_v with_o these_o word_n vides_fw-la quam_fw-la ineptum_fw-la sit_fw-la ad_fw-la explicationem_fw-la effectuum_fw-la talium_fw-la advocare_fw-la verba_fw-la metaphorica_fw-la ut_fw-la fugam_fw-la vacui_fw-la horrorem_fw-la naturae_fw-la etc._n etc._n 25._o quibus_fw-la olim_fw-la ad_fw-la existimationem_fw-la svam_fw-la tuendam_fw-la usae_fw-la sunt_fw-la scholae_fw-la nor_o be_v what_o he_o add_v concern_v the_o vacuum_n to_o be_v attribute_v to_o democritus_n and_o epicurus_n either_o clear_a enough_o or_o of_o concernment_n enough_o to_o our_o 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praeterquam_fw-la quem_fw-la aqua_fw-la deseret_fw-la but_o this_o experiment_n i_o have_v already_o examine_v as_o it_o be_v propose_v in_o his_o element_n of_o philosophy_n and_o therefore_o i_o shall_v now_o only_o say_v to_o the_o light_a variation_n i_o find_v of_o it_o here_o that_o the_o reason_n here_o assign_v why_o the_o water_n in_o gardener_n pot_n close_v at_o the_o top_n do_v not_o descend_v be_v not_o right_o assign_v since_o to_o omit_v other_o objection_n by_o monsieur_n paschall_n experiment_n it_o appear_v that_o though_o in_o pipe_n of_o no_o great_a length_n the_o water_n will_v not_o run_v out_o yet_o if_o the_o pipe_n be_v long_o enough_o though_o the_o orifice_n be_v no_o wide_o the_o water_n will_v descend_v without_o give_v passage_n to_o the_o air_n at_o the_o circumference_n of_o it_o but_o the_o other_o particular_a here_o mention_v by_o mr._n hobbs_n who_o thus_o propose_v it_o qui_fw-la per_fw-la fistulam_fw-la ore_fw-la aquam_fw-la sugit_fw-la aerem_fw-la medium_n prius_fw-la sugit_fw-la quo_fw-la distentum_fw-la aerem_fw-la externum_fw-la removet_fw-la qui_fw-la remotus_fw-la locum_fw-la in_fw-la pleno_fw-la habere_fw-la nisi_fw-la 25._o proximum_fw-la removendo_fw-la non_fw-la potest_fw-la &_o sic_fw-la continua_fw-la pulsione_n aqua_fw-la tandem_fw-la pellitur_fw-la in_o fistulam_fw-la succeditque_fw-la aeri_fw-la qui_fw-la exugitur_fw-la deserve_v a_o more_o particular_a consideration_n for_o this_o account_n of_o the_o ascension_n of_o liquor_n by_o suction_n be_v not_o only_o here_o give_v by_o mr._n hobbs_n but_o for_o the_o main_a by_o the_o learned_a gassendus_fw-la himself_n and_o other_o atomist_n and_o be_v general_o acquiesce_v in_o by_o the_o modern_a philosopher_n perhaps_o the_o rather_o because_o it_o seem_v not_o to_o establish_v or_o overthrow_v a_o vacuum_n but_o though_o i_o shall_v not_o deny_v but_o that_o many_o phaenomena_n of_o nature_n may_v be_v probable_o explicate_v by_o this_o propagation_n and_o return_n of_o motion_n yet_o there_o be_v some_o phaenomena_n here_o below_o which_o i_o see_v not_o how_o the_o cartesian_o or_o the_o atomist_n or_o mr._n hobbs_n can_v explicate_v without_o admit_v the_o spring_n of_o the_o air_n and_o which_o perhaps_o by_o the_o spring_n of_o the_o air_n may_v be_v explicate_v without_o the_o recur_v to_o such_o a_o propagation_n and_o return_n of_o impulse_n divers_a instance_n to_o this_o purpose_n i_o elsewhere_o consider_v but_o at_o present_a i_o shall_v propose_v only_o one_o experiment_n purposely_o devise_v to_o show_v that_o both_o vacuist_n and_o plenist_n shall_v admit_v a_o elastical_a power_n in_o the_o air._n i_o take_v then_o a_o glass-vessel_n consist_v of_o two_o part_n the_o one_o be_v a_o vial_n capable_a of_o contain_v about_o a_o pound_n of_o water_n and_o the_o other_o a_o pipe_n open_a at_o both_o end_n the_o low_a of_o which_o reach_v within_o two_o inch_n of_o the_o bottom_n of_o the_o vial_n this_o pipe_n be_v by_o 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weigh_v other_o body_n in_o its_o natural_a or_o ordinary_a consistence_n without_o at_o all_o condense_a it_o nay_o which_o be_v remarkable_a have_v convey_v a_o lamb_n bladder_n about_o half_a full_a of_o air_n into_o the_o receiver_n we_o observe_v that_o though_o upon_o the_o draw_v out_o of_o the_o ambient_fw-la air_n the_o imprison_a air_n so_o expanded_a itself_o as_o to_o distend_v the_o bladder_n so_o as_o to_o seem_v ready_a to_o break_v it_o yet_o this_o rarefy_a air_n do_v manifest_o depress_v the_o scale_n whereunto_o it_o be_v annex_v another_o thing_n we_o must_v not_o forget_v to_o mention_v that_o happen_v to_o we_o whilst_o we_o be_v make_v trial_n concern_v the_o weight_n of_o the_o air_n namely_o that_o have_v once_o cause_v the_o pump_n to_o be_v somewhat_o obstinate_o ply_v to_o discover_v the_o better_a what_o may_v be_v expect_v from_o the_o thinness_n of_o the_o medium_n in_o this_o experiment_n the_o imprison_v air_n break_v its_o brittle_a prison_n and_o 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those_o we_o appoint_v to_o attend_v it_o so_o excessive_o increase_v that_o when_o we_o come_v back_o to_o the_o furnace_n we_o find_v the_o spirituous_a and_o saline_a corpuscle_n pour_v out_o if_o i_o may_v so_o call_v it_o so_o hot_a and_o so_o copious_o into_o the_o receiver_n that_o they_o make_v it_o all_o opacous_a and_o more_o likely_a to_o fly_v in_o piece_n than_o fit_a to_o be_v touch_v yet_o be_v curious_a to_o observe_v the_o effect_n of_o a_o distillation_n prosecute_v with_o so_o intense_a and_o unusual_a a_o degree_n of_o heat_n we_o venture_v to_o come_v near_o and_o observe_v among_o other_o thing_n that_o on_o the_o outside_n of_o the_o receiver_n at_o a_o great_a distance_n from_o the_o juncture_n there_o be_v settle_v a_o round_a whitish_a spot_n or_o two_o which_o at_o first_o we_o think_v may_v be_v some_o stain_n upon_o the_o glass_n but_o after_o find_v it_o to_o be_v in_o divers_a quality_n like_o the_o oil_n and_o salt_n of_o the_o concrete_a we_o be_v distil_v we_o begin_v to_o suspect_v that_o the_o most_o subtle_a and_o fugitive_a part_n of_o the_o impetuous_o ascend_v steam_n have_v penetrate_v the_o substance_n as_o they_o speak_v of_o the_o glass_n and_o by_o the_o cold_a of_o the_o ambient_fw-la air_n be_v condense_v on_o the_o surface_n of_o it_o and_o though_o we_o be_v very_o backward_o to_o credit_v this_o suspicion_n and_o therefore_o call_v in_o a_o ingenious_a person_n or_o two_o both_o to_o assist_v we_o in_o the_o observation_n and_o have_v witness_v of_o its_o event_n we_o continue_v a_o while_n long_o to_o watch_v the_o escape_n of_o such_o unctuous_a fume_n and_o upon_o the_o whole_a matter_n unanimous_o conclude_v that_o all_o thing_n consider_v the_o subtle_a part_n of_o the_o distil_a matter_n be_v violent_o agitate_a by_o the_o excessive_a heat_n that_o pass_v through_o the_o pore_n of_o the_o glass_n widen_v by_o the_o same_o heat_n but_o this_o have_v never_o happen_v but_o once_o in_o any_o of_o the_o distillation_n we_o have_v either_o make_v or_o see_v though_o these_o be_v not_o a_o few_o it_o be_v much_o more_o reasonable_a to_o suppose_v that_o the_o perviousness_n of_o our_o receiver_n to_o a_o body_n much_o more_o subtle_a than_o air_n proceed_v partly_o from_o the_o loose_a texture_n of_o that_o particular_a parcel_n of_o glass_n the_o receiver_n be_v make_v of_o for_o experience_n have_v teach_v we_o that_o all_o glass_n be_v not_o of_o the_o same_o compactness_n and_o solidity_n and_o partly_o from_o the_o enormous_a heat_n which_o together_o with_o the_o vehement_a agitation_n of_o the_o penetrant_fw-la spirit_n open_v the_o pore_n of_o the_o glass_n than_o to_o imagine_v that_o such_o a_o substance_n as_o air_n shall_v be_v able_a to_o permeate_n the_o body_n of_o glass_n contrary_n to_o the_o testimony_n of_o a_o thousand_o chemical_a and_o mechanical_a experiment_n and_o of_o many_o of_o those_o make_v in_o our_o engine_n especial_o that_o new_o recite_v nay_o by_o 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of_o the_o pipe_n some_o inch_n of_o water_n will_v remain_v suspend_v which_o it_o be_v probable_a will_v not_o happen_v if_o the_o air_n can_v get_v in_o to_o succeed_v it_o since_o if_o the_o hole_n be_v a_o little_a wide_o the_o water_n will_v immediate_o subside_o and_o though_o it_o be_v true_a that_o if_o the_o pipe_n be_v of_o the_o length_n of_o many_o inch_n a_o great_a part_n of_o the_o water_n will_v run_v down_o at_o the_o wide_a orifice_n yet_o that_o seem_v to_o happen_v for_o some_o other_o reason_n than_o because_o the_o air_n succeed_v it_o at_o the_o upper_a and_o narrow_a orifice_n since_o all_o the_o slender_a part_n of_o the_o pipe_n and_o perhaps_o some_o inch_n more_o will_v continue_v full_a of_o water_n and_o on_o this_o occasion_n i_o remember_v that_o whereas_o it_o appear_v by_o our_o five_o experiment_n that_o the_o aërial_a corpuscle_n except_o perhaps_o some_o that_o be_v extraordinary_o fine_a will_v not_o pass_v through_o the_o pore_n of_o a_o lamb_n 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