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the_o bottom_n a_o pipe_n of_o glass_n which_o be_v close_o cement_v to_o the_o new_o mention_v neck_n the_o upper_a part_n of_o which_o pipe_n be_v draw_v in_o some_o place_n more_o slender_a than_o a_o crow_n quill_n that_o the_o change_n of_o the_o air_n in_o that_o glass_n egg_n may_v be_v the_o more_o conspicuous_a then_o there_o be_v convey_v into_o the_o glass_n five_o or_o six_o spoonfuls_a of_o water_n part_n of_o which_o by_o blow_v air_n into_o the_o egg_n be_v raise_v into_o the_o abovementioned_a slender_a part_n of_o the_o pipe_n so_o that_o the_o water_n be_v interpose_v between_o the_o external_a air_n and_o that_o include_v in_o the_o egg._n this_o wether_n glass_n delineate_v in_o the_o fourteen_o figure_n be_v so_o place_v and_o close_v up_o in_o the_o cavity_n of_o one_o of_o our_o small_a receiver_n that_o only_o the_o slender_a part_n of_o the_o pipe_n to_o the_o height_n of_o four_o or_o five_o inch_n pass_v through_o a_o hole_n in_o the_o cover_n remain_v 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with_o wax_n and_o afterward_o suffer_v to_o cool_v there_o will_v not_o be_v in_o the_o cavity_n of_o the_o aeolipile_n a_o resistance_n any_o thing_n near_o equal_a to_o the_o pressure_n of_o the_o outward_a air._n and_o therefore_o if_o you_o perforate_v the_o wax_n that_o air_n will_v violent_o be_v impel_v in_o at_o the_o unstop_v orifice_n whether_o the_o neck_n be_v hold_v parallel_n or_o perpendicular_a to_o the_o horizon_n or_o in_o any_o other_o situation_n in_o respect_n of_o the_o centre_n of_o the_o earth_n and_o the_o like_a will_v happen_v if_o the_o aeolipile_n be_v unstop_v under_o water_n next_o i_o relate_v in_o the_o mention_a history_n that_o have_v draw_v some_o of_o the_o air_n out_o of_o a_o large_a glass_n with_o a_o narrow_a mouth_n and_o thereby_o destroy_v the_o equality_n of_o force_n betwixt_o the_o weight_n of_o the_o outward_a air_n and_o the_o now_o weaken_a spring_n of_o the_o inward_a i_o find_v that_o by_o immediate_o apply_v a_o flat_a body_n to_o 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height_n which_o argue_v its_o be_v force_v upward_o by_o the_o oblique_a pressure_n of_o the_o air_n in_o the_o vial_n for_o it_o be_v only_o in_o the_o pipe_n and_o not_o in_o the_o vial_n that_o there_o be_v any_o air_n in_o the_o same_o perpendicular_a with_o the_o water_n that_o be_v impel_v up_o but_o let_v we_o follow_v mr._n hobbs_n a_o little_a further_o have_v ask_v this_o question_n sed_fw-la vis_fw-la illa_fw-la elastica_fw-la quam_fw-la in_o aëre_fw-la esse_fw-la dicunt_fw-la nihilne_fw-la ad_fw-la marmor_fw-la sustinendum_fw-la confer_v potest_fw-la he_o answer_n nihil_fw-la omnino_fw-la non_fw-la enim_fw-la conatus_fw-la in_o aëre_fw-la est_fw-la 21._o ullus_fw-la ad_fw-la centrum_fw-la terrae_fw-la magis_fw-la quam_fw-la ad_fw-la aliud_fw-la quodvis_fw-la punctum_fw-la universi_fw-la quoniam_fw-la enim_fw-la gravia_fw-la omne_fw-la tendunt_fw-la à _fw-la circumferentia_fw-la atmosphaerae_fw-la ad_fw-la centrum_fw-la terrae_fw-la &_o inde_fw-la rursus_fw-la ad_fw-la 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gravitare_fw-la his_o notion_n about_o gravity_n be_v somewhat_o strange_a and_o probable_o either_o do_v not_o concern_v we_o or_o will_v be_v find_v repugnant_a to_o those_o experiment_n on_o which_o our_o conjecture_n be_v ground_v and_o as_o for_o what_o he_o add_v si_fw-la possibile_fw-la esse_fw-la negarem_fw-la ut_fw-la diligentiâ_fw-la &_o arte_fw-la humanâ_fw-la dvae_fw-la superficies_n corporum_fw-la 22._o duorum_fw-la inter_fw-la se_fw-la per_fw-la omne_fw-la puncta_fw-la ita_fw-la accurate_a congruae_fw-la fiant_fw-la ut_fw-la ne_fw-la minimus_fw-la quidem_fw-la corpusculo_fw-la creabili_fw-la transitus_fw-la permittatur_fw-la non_fw-la video_fw-la quomodo_fw-la illi_fw-la aut_fw-la svam_fw-la hypothesim_n tueri_fw-la aut_fw-la negationem_fw-la nostram_fw-la improbitatis_fw-la arguere_fw-la jure_fw-la possent_fw-la i_o confess_v i_o do_v not_o see_v how_o this_o argumentation_n prove_v any_o thing_n against_o the_o interest_n either_o of_o the_o weight_n or_o so_o much_o as_o of_o the_o spring_n of_o the_o air_n in_o the_o cohesion_n of_o our_o marble_n for_o provide_v that_o the_o corpuscle_n of_o the_o air_n get_v not_o in_o between_o the_o two_o stone_n the_o pressure_n of_o the_o air_n may_v well_o suffice_v to_o keep_v they_o together_o and_o last_o as_o for_o that_o modest_a passage_n that_o immediate_o precede_v the_o word_n new_o recite_v wherein_o he_o say_v utraque_fw-la illa_fw-la phantasia_fw-la tum_fw-la gravitatis_fw-la atmosphaerae_fw-la tum_fw-la vis_fw-la elasticae_fw-la sive_fw-la antitupiae_fw-la aëris_fw-la 22._o somnium_fw-la erat_fw-la siquidem_fw-la autem_fw-la illis_fw-la concederetur_fw-la esse_fw-la aliquam_fw-la in_o filiculis_fw-la aëris_fw-la antitupiam_fw-la quaeretque_fw-la aliquis_fw-la unde_fw-la illa_fw-la curvata_fw-la quidem_fw-la sed_fw-la quiescentia_fw-la moverentur_fw-la rursus_fw-la ad_fw-la rectitudinem_fw-la deberent_fw-la illi_fw-la si_fw-la physici_fw-la haberi_fw-la volunt_fw-la causam_fw-la ejus_fw-la aliquam_fw-la possibilem_fw-la assignare_fw-la we_o have_v already_o give_v a_o account_n why_o we_o forbear_v to_o assign_v a_o cause_n of_o the_o motion_n of_o restitution_n but_o methinks_v mr._n hobbs_n may_v have_v for_o the_o speak_v so_o choose_v a_o fit_a place_n than_o this_o where_o he_o give_v i_o so_o far_o a_o opportunity_n to_o tell_v he_o again_o that_o he_o shall_v if_o he_o will_v be_v think_v a_o naturalist_n have_v assign_v some_o cause_n of_o the_o phaenomenon_n about_o which_o he_o have_v all_o this_o while_n be_v despute_v which_o since_o even_o he_o himself_o have_v decline_v to_o do_v perhaps_o the_o phaenomenon_n will_v be_v think_v somewhat_o difficult_a and_o my_o attempt_n at_o discover_v the_o cause_n of_o it_o will_v be_v at_o least_o excuse_v but_o after_o have_v so_o long_o dwell_v upon_o the_o consideration_n of_o our_o marble_n it_o be_v high_a time_n to_o proceed_v to_o what_o remain_v in_o the_o 24._o page_n mr._n hobbs_n have_v that_o passage_n i_o former_o recite_v touch_v the_o glass-fountain_n out_o of_o which_o water_n be_v throw_v up_o by_o compress_v air._n but_o though_o i_o as_o well_o as_o other_o have_v make_v use_n of_o such_o fountain_n invent_v by_o vincenzo_n vincenti_fw-la of_o urbino_n and_o be_v unsatisfied_a with_o the_o account_n he_o give_v of_o their_o phaenomena_n yet_o in_o regatd_v some_o learned_a man_n and_o particular_o dr._n ward_n have_v already_o examine_v
vessel_n the_o air_n thrust_v away_o by_o he_o that_o suck_v can_v at_o all_o come_v to_o bear_v or_o press_v upon_o the_o water_n and_o yet_o whether_o the_o pipe_n be_v incline_v or_o erect_v the_o water_n do_v according_a to_o my_o expectation_n easy_o enough_o ascend_v upon_o suction_n to_o the_o top_n of_o the_o pipe_n and_o run_v over_o into_o my_o mouth_n i_o say_v easy_o enough_o because_o that_o though_o the_o spring_n of_o the_o air_n pen_v up_o in_o the_o vial_n be_v able_a upon_o the_o decrease_n of_o the_o pressure_n of_o the_o outward_a air_n occasion_v by_o my_o suck_n to_o impel_v the_o water_n strong_o enough_o into_o the_o pipe_n yet_o when_o a_o pretty_a quantity_n of_o water_n have_v be_v so_o impel_v up_o the_o include_v air_n gain_v thereby_o more_o room_n to_o expand_v itself_o its_o spring_n be_v thereby_o so_o far_o weaken_v that_o the_o water_n ascend_v far_o less_o easy_o than_o in_o ordinary_a suction_n the_o other_o circumstance_n worth_a note_v in_o this_o experiment_n belong_v not_o to_o this_o place_n and_o what_o have_v be_v deliver_v may_v i_o hope_v suffice_v for_o the_o purpose_n it_o be_v allege_v for_o only_o one_o particular_a i_o shall_v here_o add_v by_o way_n of_o confirmation_n of_o what_o i_o say_v touch_v the_o weaken_v spring_n of_o the_o air_n and_o it_o be_v this_o that_o partly_o to_o show_v some_o who_o yet_o embrace_v the_o opinion_n of_o the_o school_n that_o the_o ascension_n of_o the_o water_n in_o the_o pipe_n do_v not_o proceed_v from_o any_o such_o tendency_n in_o the_o water_n itself_o to_o ascend_v for_o prevention_n of_o a_o vacuum_n and_o partly_o for_o other_o reason_n that_o concern_v not_o this_o place_n i_o do_v careful_o take_v out_o the_o water_n by_o degree_n till_o the_o low_a end_n of_o the_o pipe_n be_v but_o very_o little_a under_o the_o surface_n of_o the_o water_n though_o in_o the_o cavity_n of_o the_o pipe_n the_o water_n as_o it_o usual_o will_v be_v in_o pipe_n that_o be_v not_o wide_a be_v a_o pretty_a deal_n high_o then_o suffer_v the_o vessel_n to_o rest_v and_o suck_v at_o the_o upper_a end_n of_o the_o pipe_n the_o water_n as_o i_o foresee_v it_o will_v be_v be_v impel_v up_o yet_o without_o reach_v near_o the_o top_n till_o the_o surface_n of_o it_o be_v fall_v a_o little_a below_o the_o bottom_n of_o the_o pipe_n but_o then_o though_o i_o continue_v suck_v no_o more_o water_n ascend_v into_o the_o pipe_n but_o the_o air_n pass_v through_o it_o towards_o my_o mouth_n do_v in_o its_o passage_n toss_v up_o the_o water_n that_o be_v already_o in_o the_o pipe_n and_o turn_v it_o into_o bubble_n of_o a_o strong_a bigness_n when_o the_o cavity_n of_o the_o pipe_n will_v permit_v it_o which_o break_v not_o without_o noise_n one_o after_o another_o and_o thus_o the_o ascend_a air_n for_o a_o pretty_a while_n keep_v the_o water_n in_o the_o pipe_n from_o fall_v back_o to_o that_o in_o the_o vial._n but_o when_o i_o remove_v my_o mouth_n the_o spring_n of_o the_o air_n remain_v in_o the_o cavity_n of_o the_o vial_n be_v debilitate_a by_o the_o recess_n of_o the_o air_n i_o have_v as_o man_n be_v wont_a to_o speak_v suck_v out_o it_o be_v not_o able_a to_o resist_v the_o pressure_n of_o the_o outward_a air_n and_o according_o the_o water_n in_o the_o pipe_n be_v not_o only_o depress_v into_o the_o vial_n but_o the_o outward_a air_n force_v its_o way_n in_o many_o bubble_n and_o not_o without_o some_o noise_n through_o the_o water_n contiguous_a to_o the_o bottom_n of_o the_o pipe_n till_o the_o pressure_n of_o the_o include_v air_n and_o that_o of_o the_o atmosphere_n be_v reduce_v to_o a_o equality_n but_o in_o the_o same_o 25._o page_n our_o author_n tell_v we_o that_o the_o society_n he_o write_v against_o will_v have_v the_o cause_n of_o filtration_n and_o that_o of_o the_o passage_n of_o water_n through_o siphons_n to_o be_v the_o same_o to_o which_o he_o annex_v this_o peremptory_a passage_n id_fw-la vero_fw-la impossibile_fw-it est_fw-la no_o in_o siphone_n nisi_fw-la ambo_fw-la crura_fw-la aquâ_fw-la impleantur_fw-la aqua_fw-la è_fw-la pelvi_fw-la non_fw-la ascendet_fw-la ascensionis_fw-la causa_fw-la in_o pannum_fw-la est_fw-la motus_fw-la ille_fw-la terrearum_fw-la atomorum_fw-la quae_fw-la aquae_fw-la contiguae_fw-la sunt_fw-la motus_fw-la inquam_fw-la circularis_fw-la simplex_fw-la aëri_fw-la in_o quo_fw-la moventur_fw-la communicatus_fw-la quae_fw-la atomy_n aquam_fw-la ferientes_fw-la in_o materiam_fw-la laneam_fw-la incutiunt_fw-la incussae_fw-la autem_fw-la magis_fw-la magisque_fw-la madefaciunt_fw-la donec_fw-la madida_fw-la tota_fw-la sit_fw-la cum_fw-la vero_fw-la madida_fw-la tota_fw-la sit_fw-la etc._n etc._n thus_o far_o he_o but_o the_o passage_n in_o my_o epistle_n upon_o which_o he_o seem_v to_o have_v ground_v his_o opposition_n be_v but_o this_o wherewith_o i_o begin_v my_o 35._o experiment_n some_o learned_a mathematician_n i_o mean_v the_o industrious_a schottus_n and_o some_o cartesian_o have_v of_o late_o ingenious_o endeavour_v to_o reduce_v filtre_n to_o siphons_n but_o still_o the_o cause_n of_o the_o ascension_n of_o water_n and_o other_o liquor_n both_o in_o siphons_n and_o in_o filtration_n need_v for_o aught_o we_o have_v yet_o find_v a_o clear_a discovery_n and_o explication_n we_o be_v desirous_a to_o try_v etc._n etc._n so_o that_o neither_o do_v i_o ascribe_v this_o reduction_n of_o filtre_n to_o siphons_n to_o a_o society_n which_o be_v not_o then_o in_o be_v nor_o perhaps_o so_o much_o as_o design_v nor_o do_v i_o adopt_v it_o myself_o but_o express_v a_o desire_n to_o have_v it_o further_o examine_v but_o as_o for_o the_o cause_n of_o filtration_n itself_o i_o may_v take_v a_o fit_a opportunity_n to_o discourse_v of_o it_o in_o the_o mean_a time_n i_o doubt_v whether_o the_o reason_n here_o assign_v by_o mr._n hobbs_n will_v not_o seem_v as_o well_o precarious_a as_o the_o motus_fw-la circularis_fw-la simplex_fw-la of_o earthly_a atom_n whereon_o it_o be_v ground_v nor_o do_v his_o explication_n render_v a_o reason_n why_o quicksilver_n will_v not_o ascend_v the_o 14._o part_n as_o high_a in_o the_o filtre_n though_o in_o part_n immerse_v into_o it_o as_o water_n nay_o will_v not_o reach_v so_o high_a where_o it_o be_v contiguous_a to_o the_o filtre_n as_o where_o it_o be_v not_o nor_o why_o it_o shall_v begin_v to_o ascend_v since_o for_o aught_o he_o show_v to_o the_o contrary_a the_o pressure_n of_o the_o air_n even_o in_o the_o sense_n he_o take_v the_o air_n aught_o to_o be_v the_o same_o on_o that_o part_n of_o the_o surface_n of_o the_o liquor_n which_o be_v contiguous_a to_o the_o filtre_n and_o on_o any_o other_o part_n of_o the_o same_o surface_n to_o which_o i_o shall_v only_o add_v that_o as_o resolute_o as_o mr._n hobbs_n say_v it_o be_v impossible_a for_o the_o water_n to_o ascend_v out_o of_o the_o vessel_n into_o a_o siphon_n unless_o both_o the_o leg_n be_v fill_v with_o that_o liquor_n he_o will_v probable_o have_v speak_v more_o wary_o and_o distinguish_v betwixt_o siphons_n if_o he_o have_v be_v please_v to_o take_v notice_n of_o what_o i_o relate_v in_o the-forementioned_n 35._o experiment_n of_o a_o small_a glass-siphon_a i_o devise_v whereof_o when_o the_o short_a leg_n be_v but_o dip_v in_o water_n the_o liquor_n do_v present_o as_o it_o be_v of_o itself_o run_v down_o the_o long_a leg_n which_o experiment_n beside_o other_o consideration_n may_v induce_v we_o to_o suspect_v that_o the_o nature_n of_o siphons_n and_o of_o filtration_n may_v not_o yet_o be_v so_o thorough_o understand_v as_o not_o to_o deserve_v a_o further_a enquiry_n but_o to_o draw_v at_o length_n towards_o a_o conclusion_n of_o our_o troublesome_a examen_fw-la it_o remain_v only_o that_o i_o take_v some_o notice_n of_o the_o general_a corollary_n that_o mr._n hobbs_n be_v please_v to_o deduce_v from_o his_o whole_a discourse_n of_o the_o experiment_n exhibit_v in_o our_o engine_n a._n fateris_fw-la ergo_fw-la say_v he_o nihil_fw-la hactenus_fw-la à _fw-la collegis_fw-la tuis_fw-la promotam_fw-la esse_fw-la scientiam_fw-la causarum_fw-la naturalium_fw-la 23._o nisi_fw-la quod_fw-la unus_fw-la eorum_fw-la machinam_fw-la invenerit_fw-la qua_fw-la motus_fw-la excitari_fw-la aeris_fw-la possit_fw-la talis_fw-la ut_fw-la part_n sphaerae_fw-la simul_fw-la undiquaque_fw-la tendant_a ad_fw-la centrum_fw-la &_o ut_fw-la hypothesis_n hobbianae_n ante_fw-la quidem_fw-la satis_fw-la probabiles_fw-la hinc_fw-la reddantur_fw-la probabiliores_fw-la b._n nec_fw-la fateri_fw-la pudet_fw-la nam_fw-la est_fw-la aliquid_fw-la prodire_fw-la tenus_fw-la si_fw-la non_fw-la datur_fw-la ultra_fw-la a._n quid_fw-la tenus_fw-la quorsum_fw-la autem_fw-la tantus_fw-la apparatus_n &_o sumptus_fw-la machinarum_fw-la factu_fw-la difficilium_fw-la ut_fw-la eatenus_fw-la tantum_fw-la prodiretis_fw-la quantum_fw-la ante_fw-la prodierat_fw-la hobbius_n cur_n non_fw-la inde_fw-la potius_fw-la incepistis_fw-la ubi_fw-la ille_fw-la desiit_fw-la cur_n principiis_fw-la ab_fw-la eo_fw-la positis_fw-la non_fw-la estis_fw-la usi_fw-la cumque_fw-la aristoteles_n recte_fw-la dixisset_fw-la
perforate_v with_o a_o little_a hole_n 8_o traverse_v the_o whole_a thickness_n of_o it_o at_o the_o low_a end_n through_o which_o and_o a_o little_a brass_n ring_n l_o fasten_v to_o one_o side_n no_o matter_n which_o of_o the_o bottom_n of_o the_o stopple_n fg_n a_o string_n 8_o 9_o 10._o may_v pass_v to_o be_v employ_v to_o move_v some_o thing_n in_o the_o capacity_n of_o the_o empty_v vessel_n without_o any_o where_o unstop_v it_o the_o last_o thing_n belong_v to_o our_o receiver_n be_v the_o stop-cock_n design_v in_o the_o first_o figure_n by_o n_o for_o the_o better_a fasten_n of_o which_o to_o the_o neck_n and_o exacter_n exclusion_n of_o the_o air_n there_o be_v solder_a on_o to_o the_o shank_n of_o the_o cock_n x_o a_o plate_n of_o tin_n mtuw_n long_a enough_o to_o cover_v the_o neck_n of_o the_o receiver_n but_o because_o the_o cement_n of_o this_o be_v a_o matter_n of_o some_o difficulty_n it_o will_v not_o be_v amiss_o to_o mention_v here_o the_o manner_n of_o it_o which_o be_v that_o the_o cavity_n of_o the_o tin_n plate_n be_v fill_v with_o a_o melt_a cement_n make_v of_o pitch_n rosin_n and_o wood_n ash_n well_o incorporate_v and_o to_o hinder_v this_o liquid_a mixture_n from_o get_v into_o the_o orifice_n z_o of_o the_o shank_n x_o that_o hole_n be_v stop_v with_o a_o cock_n to_o which_o be_v fasten_v a_o string_n whereby_o it_o may_v be_v pull_v out_o at_o the_o upper_a orifice_n of_o the_o receiver_n and_o then_o the_o glass_n neck_n of_o the_o receiver_n be_v well_o warm_v be_v thrust_v into_o this_o cement_n and_o over_o the_o shank_n whereby_o it_o be_v effect_v that_o all_o the_o space_n betwixt_o the_o tin_n plate_n and_o the_o receiver_n and_o betwixt_o the_o internal_a superficies_n of_o the_o receiver_n and_o the_o shank_n of_o the_o cock_n be_v fill_v with_o the_o cement_n and_o so_o we_o have_v dispatch_v the_o first_o upper_a part_n of_o the_o engine_n the_o undermost_a remain_a part_n consist_v of_o a_o frame_n and_o of_o a_o suck_a pump_n or_o as_o we_o former_o call_v it_o a_o air_n pump_n support_v by_o it_o the_o frame_n be_v of_o wood_n small_a but_o very_o strong_a consist_v of_o three_o leg_n 111_o so_o place_v that_o one_o side_n of_o it_o may_v stand_v perpendicular_a that_o the_o free_a motion_n of_o the_o hand_n may_v not_o be_v hinder_v in_o the_o midst_n of_o which_o frame_n be_v transvers_o nail_v a_o board_n 222_o which_o may_v not_o improper_o be_v call_v a_o midriff_n upon_o which_o rest_v and_o to_o which_o be_v strong_o fasten_v the_o main_a part_n of_o the_o pump_n itself_o which_o be_v the_o only_a thing_n remain_v to_o be_v describe_v the_o pump_n consist_v of_o four_o part_n a_o hollow_a cylinder_n a_o sucker_n a_o handle_n to_o move_v that_o sucker_n and_o a_o valve_n the_o cylinder_n be_v by_o a_o pattern_n cast_v of_o brass_n it_o be_v in_o length_n about_o 14_o inch_n thick_a enough_o to_o be_v very_o strong_a notwithstanding_o the_o cylindrical_a cavity_n leave_v within_o it_o this_o cavity_n be_v about_o three_o inch_n diametre_fw-la and_o make_v as_o exact_v a_o cylinder_n as_o the_o artificer_n be_v able_a to_o bore_v this_o hollow_a cylinder_n be_v fit_v with_o a_o sucker_n 4455_o consist_v of_o two_o part_n the_o one_o 44_o somewhat_o less_o in_o diametre_fw-la than_o the_o cavity_n of_o the_o cylinder_n upon_o which_o be_v nail_v a_o good_a thick_a piece_n of_o tan_a shoe-leather_n which_o will_v go_v so_o close_o to_o the_o cylinder_n that_o it_o will_v need_v to_o be_v very_o forcible_o knock_v and_o ram_v in_o if_o at_o any_o time_n it_o be_v take_v out_o which_o be_v therefore_o do_v that_o it_o may_v the_o more_o exact_o hinder_v the_o air_n from_o insinuate_v itself_o betwixt_o it_o and_o the_o side_n of_o the_o cylinder_n whereon_o it_o be_v to_o move_v to_o the_o midst_n of_o this_o former_a part_n of_o the_o sucker_n be_v strong_o fasten_v the_o other_o namely_o a_o thick_a and_o narrow_a plate_n of_o iron_n 55_o somewhat_o long_a than_o the_o 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the_o figure_n of_o the_o vessel_n may_v have_v a_o interest_n in_o this_o odd_a phaenomenon_n we_o take_v the_o late_o mention_v philosophical_a egg_n and_o another_o not_o much_o differ_v from_o it_o the_o former_a we_o fill_v up_o with_o distil_a rain-water_n to_o the_o old_a mark_n and_o into_o the_o latter_a we_o put_v a_o long_o cylinder_n or_o rod_n of_o solid_a glass_n to_o straiten_v the_o cavity_n of_o the_o neck_n by_o almost_o fill_v it_o up_o and_o then_o pour_v some_o distil_a water_n into_o that_o also_o till_o it_o reach_v within_o some_o finger_n breadth_n of_o the_o top_n the_o egg_n be_v let_v down_o into_o the_o receiver_n in_o this_o experiment_n the_o air_n be_v so_o far_o draw_v forth_o before_o there_o appear_v any_o bubble_n in_o either_o of_o the_o glass_n that_o the_o disparity_n betwixt_o this_o and_o common_a water_n be_v manifest_a enough_o but_o at_o length_n when_o the_o air_n be_v almost_o quite_o pump_v out_o the_o bubble_n begin_v to_o disclose_v 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bubble_n in_o the_o oil_n much_o soon_o than_o in_o the_o water_n and_o afterward_o they_o also_o ascend_v much_o more_o copious_o in_o the_o former_a liquor_n than_o in_o the_o latter_a nay_o and_o when_o by_o have_v quite_o tire_v the_o pumper_n and_o almost_o our_o own_o patience_n we_o give_v over_o the_o bubble_n rise_v almost_o if_o not_o altogether_o in_o as_o great_a number_n as_o ever_o insomuch_o that_o none_o of_o the_o various_a liquor_n we_o try_v either_o before_o or_o since_o seem_v to_o abound_v more_o with_o aerial_a particle_n than_o do_v this_o oil_n in_o which_o it_o be_v far_o remarkable_a that_o between_o the_o time_n it_o be_v set_v into_o the_o receiver_n and_o that_o at_o which_o we_o can_v get_v ready_a to_o pump_v it_o subside_v notable_o by_o guess_n about_o half_a a_o inch_n below_o the_o mark_v it_o reach_v before_o it_o be_v put_v in_o after_o this_o express_a oil_n we_o make_v trial_n of_o a_o distil_a one_o and_o for_o that_o purpose_n make_v choice_n 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recess_n of_o the_o bubble_n have_v likewise_o a_o mind_n to_o try_v whether_o as_o strong_a a_o solution_n of_o salt_n of_o tartar_n in_o fair_a water_n as_o can_v be_v make_v we_o have_v then_o no_o oil_n of_o tartar_n per_fw-la deliquium_fw-la at_o hand_n though_o it_o be_v account_v quicksilver_n except_v the_o heavy_a of_o liquor_n will_v afford_v we_o any_o bubble_n we_o put_v in_o a_o glass_n egg_n full_a of_o it_o at_o the_o same_o time_n with_o other_o liquor_n and_o find_v that_o they_o do_v long_o yield_v store_n of_o bubble_n before_o any_o discover_v themselves_o in_o the_o liquor_n of_o tartar_n and_o have_v pursue_v the_o experiment_n it_o appear_v that_o of_o all_o the_o liquor_n we_o make_v trial_n of_o this_o afford_v the_o few_o and_o small_a bubble_n spirit_n of_o vinegar_n be_v try_v after_o the_o same_o manner_n exhibit_v a_o moderate_a number_n of_o bubble_n but_o scarce_o any_o thing_n else_o worth_a the_o mention_v nor_o can_v we_o in_o red_a wine_n try_v in_o a_o glass_n egg_n take_v notice_n of_o any_o thing_n very_o observable_a for_o though_o upon_o the_o exsuction_n of_o the_o air_n the_o bubble_n ascend_v in_o this_o liquor_n as_o it_o be_v in_o shoal_n and_o shift_v place_n among_o themselves_o in_o their_o ascent_n yet_o the_o intumescence_n of_o the_o whole_a bulk_n of_o the_o liquor_n be_v scarce_o at_o all_o sensible_a the_o bubble_n most_o common_o break_v very_o soon_o after_o their_o arrival_n at_o the_o top_n where_o during_o their_o stay_n they_o compose_v a_o kind_n of_o shallow_a froth_n which_o alone_o appear_v high_o in_o the_o neck_n of_o the_o glass_n than_o be_v the_o wine_n when_o it_o be_v let_v down_o neither_o yet_o do_v milk_n convey_v into_o our_o pneumatical_a vessel_n present_v we_o with_o any_o thing_n memorable_a save_o
admovens_fw-la cum_fw-la luctatus_fw-la diu_fw-la haerentem_fw-la non_fw-la removisset_fw-la excusavit_fw-la impotentiam_fw-la objecta_fw-la peregrini_fw-la &_o potentissimi_fw-la glutinis_fw-la interpositione_n quo_fw-la fortissime_fw-la copulante_fw-la nequiret_fw-la divelli_fw-la donec_fw-la vidit_fw-la ab_fw-la alio_fw-la per_fw-la tabulam_fw-la facilimè_fw-la laminam_fw-la deduci_fw-la &_o ad_fw-la extrema_fw-la productam_fw-la &_o actam_fw-la in_o transversum_fw-la inde_fw-la deportari_fw-la but_o that_o we_o may_v learn_v from_o our_o own_o engine_n that_o two_o body_n though_o they_o touch_v each_o other_o but_o in_o a_o small_a part_n of_o their_o surface_n may_v be_v make_v to_o cohere_v very_o strong_o only_o by_o this_o that_o the_o air_n press_v much_o more_o forcible_o upon_o the_o inferior_a superficies_n of_o the_o lowermost_a body_n than_o upon_o the_o upper_a surface_n of_o the_o same_o we_o will_v hereunto_o annex_v the_o follow_a experiment_n though_o out_o of_o the_o order_n wherein_o they_o be_v make_v experiment_n xxxii_o i_o remember_v i_o have_v in_o a_o discourse_n touch_v fluidity_n and_o firmness_n make_v mention_n of_o my_o have_v by_o the_o exsuction_n of_o the_o air_n out_o of_o a_o glass_n vessel_n make_v that_o vessel_n take_v up_o or_o suck_v up_o to_o speak_v in_o the_o common_a language_n a_o body_n weigh_v divers_a ounce_n but_o our_o engine_n afford_v we_o the_o opportunity_n of_o make_v considerable_a experiment_n of_o that_o kind_n we_o think_v fit_a to_o make_v a_o further_a trial_n of_o the_o force_n of_o the_o atmosphere_n pressure_n upward_o after_o the_o follow_a manner_n the_o receiver_n have_v be_v exquisite_o close_v as_o we_o have_v often_o teach_v already_o and_o the_o air_n be_v in_o a_o good_a measure_n draw_v out_o of_o it_o it_o be_v remove_v from_o off_o the_o pump_n and_o to_o the_o low_a branch_n of_o the_o stop-cock_n there_o be_v speedy_o apply_v a_o taper_a valve_n of_o brass_n such_o as_o be_v describe_v in_o the_o 9th_o figure_n make_v fit_a to_o go_v with_o its_o narrow_a end_n into_o the_o cavity_n of_o the_o branch_n and_o to_o fill_v the_o orifice_n of_o that_o cavity_n with_o its_o broad_a part_n and_o that_o the_o air_n may_v not_o get_v in_o at_o the_o little_a interval_n leave_v here_o and_o there_o between_o the_o convex_a surface_n of_o the_o stopple_n and_o the_o internal_a edge_n of_o the_o branch_n those_o interval_n be_v stop_v with_o a_o little_a diachylon_n and_o to_o the_o door_n or_o if_o you_o please_v that_o part_n of_o the_o valve_n which_o be_v to_o move_v to_o and_o fro_o and_o in_o this_o experiment_n hang_v perpendicular_a to_o the_o horizon_n there_o be_v at_o a_o button_n of_o brass_n belong_v to_o the_o valve_n fasten_v a_o broad_a scale_n wherein_o weight_n be_v to_o be_v put_v this_o do_v the_o key_n of_o the_o stop-cock_n be_v turn_v and_o the_o external_a air_n beat_v like_o a_o forcible_a stream_n upon_o the_o valve_n to_o get_v in_o there_o it_o do_v sudden_o both_o shut_v the_o valve_n and_o keep_v it_o shut_v so_o strong_o that_o we_o have_v time_n to_o cast_v in_o divers_a weight_n one_o after_o another_o into_o the_o scale_n till_o at_o length_n the_o weight_n overpower_v the_o pressure_n of_o the_o atmosphere_n draw_v down_o the_o valve_n by_o the_o string_n that_o tie_v the_o scale_n to_o it_o and_o give_v liberty_n to_o the_o outward_a air_n to_o rush_v into_o the_o receiver_n though_o another_o time_n when_o the_o valve_n have_v but_o little_a weight_n hang_v at_o it_o be_v by_z i_o know_v not_o what_o accident_n draw_v down_o beneath_o its_o former_a place_n it_o be_v by_o the_o impetuous_a current_n of_o the_o outward_a air_n sudden_o impel_v up_o into_o it_o again_o and_o keep_v there_o but_o in_o the_o former_a experiment_n it_o be_v remarkable_a that_o though_o the_o receiver_n be_v not_o well_o exhaust_v and_o though_o it_o leak_v whilst_o the_o rest_n of_o the_o experiment_n be_v in_o prosecution_n and_o though_o the_o valve_n whereon_o the_o cylinder_n of_o the_o atmosphere_n can_v press_v be_v not_o above_o a_o inch_n and_o a_o half_a in_o diameter_n yet_o the_o weight_n keep_v up_o by_o suction_n or_o rather_o support_v by_o the_o air_n namely_o the_o valve_n the_o scale_n and_o what_o be_v cast_v out_o of_o it_o be_v send_v to_o be_v weigh_v amount_v to_o about_o ten_o of_o our_o common_a pound_n consist_v of_o sixteen_o ounce_n a_o piece_n so_o that_o we_o doubt_v not_o but_o that_o have_v the_o experiment_n be_v make_v with_o favourable_a circumstance_n the_o air_n endeavour_v to_o press_v in_o at_o the_o orifice_n of_o the_o stop-cock_n will_v have_v keep_v a_o very_a much_o great_a weight_n from_o fall_v out_o of_o it_o i_o say_v the_o air_n because_o we_o find_v by_o trial_n purposely_o make_v that_o neither_o the_o imperfect_a contact_n of_o the_o valve_n and_o the_o stop-cock_n nor_o the_o diachylon_n that_o be_v employ_v to_o fill_v up_o the_o little_a cranny_n leave_v betwixt_o they_o be_v considerable_a in_o this_o experiment_n by_o which_o it_o may_v among_o other_o thing_n appear_v that_o i_o do_v not_o without_o cause_n in_o the_o abovenamed_a discourse_v touch_v fluidity_n and_o firmness_n ascribe_v a_o great_a force_n even_o to_o such_o pillar_n of_o air_n as_o may_v be_v suppose_v to_o begin_v at_o the_o top_n of_o the_o atmosphere_n and_o recoil_v from_o the_o ground_n to_o terminate_v on_o the_o body_n on_o which_o they_o press_v since_o in_o the_o present_a experiment_n such_o a_o weight_n be_v support_v by_o so_o slender_a a_o cylinder_n of_o air_n rebound_v from_o the_o earth_n to_o the_o valve_n whereon_o it_o do_v bear_v experiment_n xxxiii_o but_o in_o regard_n we_o have_v not_o yet_o be_v able_a to_o empty_v so_o great_a a_o vessel_n as_o our_o receiver_n so_o well_o as_o we_o can_v the_o cylinder_n itself_o our_o pump_n alone_o may_v afford_v we_o a_o noble_a instance_n of_o the_o force_n of_o the_o air_n we_o live_v in_o insomuch_o that_o by_o help_n of_o this_o part_n of_o our_o engine_n we_o may_v give_v a_o pretty_a near_o guess_n at_o the_o strength_n of_o the_o atmosphere_n compute_v as_o a_o weight_n and_o the_o way_n may_v be_v this_o first_o the_o sucker_n be_v bring_v to_o move_v easy_o up_o and_o down_o the_o cylinder_n be_v to_o be_v impel_v to_o the_o top_n of_o it_o then_o the_o receiver_n must_v be_v take_v off_o from_o the_o pump_n that_o the_o upper_a orifice_n of_o the_o cylinder_n remain_v open_v the_o air_n may_v free_o succeed_v the_o sucker_n and_o therefore_o ready_o yield_v to_o its_o motion_n downward_o this_o do_v there_o must_v be_v fasten_v to_o one_o of_o the_o iron_n tooth_n of_o the_o sucker_n such_o a_o weight_n as_o may_v just_o suffice_v to_o draw_v it_o to_o the_o bottom_n of_o the_o cylinder_n and_o have_v thus_o examine_v what_o weight_n be_v necessary_a to_o draw_v down_o the_o sucker_n when_o the_o atmosphere_n make_v no_o other_o than_o the_o ordinary_a resistance_n of_o the_o air_n against_o its_o descent_n the_o sucker_n must_v be_v again_o force_v to_o the_o top_n of_o the_o cylinder_n who_o upper_a orifice_n must_v now_o be_v exact_o close_v and_o then_o the_o first_o weight_n remain_v we_o easy_o may_v by_o hang_v a_o scale_n to_o the_o abovementioned_a iron_n that_o make_v part_n of_o the_o sucker_n cast_v in_o know_a weight_n so_o long_o till_o in_o spite_n of_o the_o reluctancy_n of_o the_o atmosphere_n the_o sucker_n be_v draw_v down_o for_o to_o these_o weight_n in_o the_o scale_n that_o of_o the_o scale_n itself_o be_v add_v the_o sum_n will_v give_v we_o the_o weight_n of_o a_o column_n of_o air_n equal_a in_o diameter_n to_o the_o sucker_n or_o to_o the_o cavity_n of_o the_o cylinder_n and_o in_o length_n to_o the_o height_n of_o the_o atmosphere_n according_a to_o this_o method_n we_o do_v since_o the_o write_n of_o the_o last_o experiment_n attempt_v to_o measure_v the_o pressure_n of_o the_o atmosphere_n but_o find_v it_o more_o difficult_a than_o we_o expect_v to_o persorm_v it_o with_o any_o accurateness_n for_o though_o by_o the_o help_n of_o the_o manubrium_fw-la the_o sucker_n move_v up_o and_o down_o with_o so_o much_o ease_n that_o one_o will_v have_v think_v that_o both_o its_o convex_a surface_n and_o the_o concave_a one_o of_o the_o cylinder_n be_v exquisite_o smooth_a and_o as_o it_o be_v slippery_a yet_o when_o the_o sucker_n come_v to_o be_v move_v only_o with_o a_o dead_a weight_n or_o pressure_n that_o be_v not_o like_o the_o force_n of_o he_o that_o pump_v intend_v as_o occasion_v require_v we_o find_v that_o the_o little_a rufness_n or_o other_o inequality_n and_o perhaps_o too_o the_o unequal_a pressure_n of_o the_o leather_n against_o the_o cavity_n of_o the_o cylinder_n be_v able_a now_o and_o then_o to_o put_v a_o stop_n to_o the_o descent_n or_o ascent_n of_o the_o sucker_n though_o a_o
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 throw_v the_o great_a part_n of_o it_o against_o the_o side_n of_o the_o receiver_n dash_v it_o against_o that_o thick_a glass_n into_o a_o multitude_n of_o piece_n which_o accident_n i_o mention_v partly_o that_o it_o may_v confirm_v what_o we_o deliver_v in_o our_o reflection_n upon_o the_o first_o experiment_n where_o we_o consider_v what_o will_v probable_o be_v do_v by_o the_o spring_n of_o the_o air_n imprison_v in_o such_o glass_n in_o case_n the_o balance_a pressure_n of_o the_o ambient_fw-la air_n be_v withdraw_v and_o partly_o that_o we_o may_v thence_o discern_v of_o how_o close_o a_o texture_n glass_n be_v since_o so_o very_o thin_a a_o film_n of_o glass_n if_o i_o may_v so_o call_v it_o prove_v so_o impervious_a to_o the_o air_n that_o it_o can_v not_o get_v away_o through_o the_o pore_n but_o be_v force_v to_o break_v the_o glass_n in_o piece_n to_o free_v itself_o and_o this_o notwithstanding_o the_o time_n and_o advantage_n it_o have_v to_o try_v to_o get_v out_o at_o the_o pore_n and_o this_o i_o mention_v that_o neither_o our_o experiment_n nor_o those_o of_o divers_a learned_a man_n may_v receive_v any_o prejudice_n from_o a_o experiment_n which_o i_o happen_v to_o make_v divers_a year_n ago_o and_o which_o have_v be_v so_o much_o take_v notice_n of_o by_o curious_a man_n may_v be_v draw_v to_o countenance_v their_o erroneous_a opinion_n who_o will_v fain_o persuade_v we_o that_o glass_n be_v penetrable_a by_o air_n proper_o so_o call_v our_o experiment_n be_v brief_o this_o we_o be_v distil_v a_o certain_a substance_n that_o much_o abound_v with_o subtle_a spirit_n and_o volatile_a salt_n in_o a_o strong_a earthen_a vessel_n of_o a_o unusual_a shape_n to_o which_o be_v lute_v a_o large_a receiver_n make_v of_o the_o course_n sort_n of_o glass_n which_o the_o tradesman_n be_v wont_a to_o call_v green_a glass_n but_o in_o our_o absence_n the_o fire_n though_o it_o be_v to_o be_v very_o strong_a be_v by_o the_o negligence_n or_o mistake_n of_o 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 our_o five_o experiment_n it_o appear_v that_o a_o thin_a bladder_n will_v not_o at_o its_o pore_n give_v passage_n even_o to_o rarefy_v air._n and_o on_o this_o occasion_n we_o will_v annex_v a_o experiment_n which_o have_v make_v some_o of_o those_o we_o have_v acquaint_v with_o it_o doubt_n whether_o the_o corpuscle_n of_o the_o air_n be_v not_o less_o subtle_a than_o those_o of_o water_n but_o without_o examine_v here_o the_o reasonableness_n of_o that_o doubt_n we_o will_v proceed_v to_o recite_v the_o experiment_n itself_o which_o seem_v to_o teach_v that_o though_o air_n when_o sufficient_o compress_v may_v perchance_o get_v entrance_n into_o narrow_a hole_n and_o cranny_n than_o water_n yet_o unless_o the_o air_n be_v force_v in_o at_o such_o very_a little_a hole_n it_o will_v not_o get_v in_o at_o they_o though_o they_o may_v be_v big_a enough_o to_o let_v water_n pass_v through_o they_o the_o experiment_n than_o be_v this_o i_o take_v a_o fair_a glass_n siphon_n the_o low_a end_n of_o who_o long_a leg_n be_v draw_v by_o degree_n to_o such_o a_o slenderness_n that_o the_o orifice_n at_o which_o the_o water_n be_v to_o fall_v out_o will_v hardly_o admit_v a_o very_a small_a pin_n this_o siphon_n be_v invert_v the_o matter_n be_v so_o order_v that_o a_o little_a bubble_n of_o air_n be_v intercept_v in_o the_o slender_a part_n of_o the_o siphon_n betwixt_o the_o little_a hole_n new_o mention_v and_o the_o incumbent_a water_n upon_o which_o it_o come_v to_o pass_v that_o the_o air_n be_v not_o to_o be_v force_v through_o so_o narrow_a a_o passage_n by_o so_o light_a a_o cylinder_n of_o water_n though_o amount_v to_o the_o length_n of_o divers_a inch_n as_o lean_v upon_o it_o hinder_v the_o far_a efflux_n of_o the_o water_n as_o long_o as_o i_o please_v to_o let_v it_o stay_v in_o that_o narrow_a place_n whereas_o when_o by_o blow_v a_o little_a at_o the_o wide_a end_n of_o the_o siphon_n that_o little_a parcel_n of_o air_n be_v force_v out_o with_o some_o water_n the_o remain_a water_n that_o before_o continue_v suspend_v begin_v free_o to_o drop_v down_o again_o as_o former_o and_o if_o you_o take_v a_o glass_n pipe_n whether_o it_o be_v in_o the_o form_n of_o a_o siphon_n or_o no_o that_o be_v for_o the_o most_o part_n of_o the_o thickness_n of_o a_o man_n finger_n be_v yet_o towards_o one_o end_n so_o slender_a as_o to_o terminate_v in_o a_o hole_n almost_o as_o small_a as_o a_o horsehair_n and_o if_o you_o fill_v this_o pipe_n with_o water_n you_o will_v find_v that_o liquor_n to_o drop_v down_o free_o enough_o through_o the_o slender_a extreme_a but_o if_o you_o then_o invert_v the_o pipe_n you_o will_v find_v that_o the_o air_n will_v not_o easy_o get_v in_o at_o the_o same_o hole_n through_o which_o the_o water_n pass_v for_o in_o the_o sharp_a end_n
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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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