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to_o usher_v in_o with_o a_o compliment_n to_o i_o that_o i_o shall_v be_v very_o vain_a if_o i_o look_v upon_o as_o any_o thing_n more_o than_o a_o compliment_n to_o his_o first_o objection_n propose_v in_o these_o word_n 139._o word_n 139._o primò_fw-la enim_fw-la si_fw-la haec_fw-la solutio_fw-la verè_fw-la mechanica_fw-la sit_fw-la quae_fw-la tandem_fw-la causa_fw-la verè_fw-la mechanica_fw-la assignari_fw-la potest_fw-la gravitationis_fw-la singularum_fw-la particularum_fw-la totiúsque_fw-la atmosphaerae_fw-la in_o suis_fw-la locis_fw-la nam_fw-la quod_fw-la materiam_fw-la subtilem_fw-la attinet_fw-la etc._n etc._n i_o answer_v that_o i_o do_v not_o in_o that_o book_n intend_v to_o write_v a_o whole_a systeme_n or_o so_o much_o as_o the_o element_n of_o natural_a philosophy_n but_o have_v sufficient_o prove_v that_o the_o air_n we_o live_v in_o be_v not_o devoid_a of_o weight_n and_o be_v endow_v with_o a_o elastical_a power_n or_o springiness_n i_o endeavour_v by_o those_o two_o 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transversis_fw-la &_o obliquis_fw-la i_o presume_v he_o do_v not_o sufficient_o consider_v our_o hypothesis_n and_o the_o nature_n of_o the_o pressure_n of_o fluid_a body_n that_o have_v weight_n for_o water_n to_o which_o no_o springiness_n be_v ascribe_v as_o there_o be_v to_o air_n but_o which_o act_n by_o its_o weight_n and_o fluidity_n be_v able_a upon_o the_o score_n of_o those_o quality_n to_o buoy_v up_o great_a ship_n that_o the_o ebb_a tide_n often_o leave_v upon_o the_o strand_n and_o whereas_o the_o learned_a examiner_n propose_v a_o four_o objection_n in_o these_o term_n 139._o term_n p._n 139._o quibus_fw-la omnibus_fw-la addas_fw-la difficile_fw-la esse_fw-la intellectu_fw-la si_fw-la unius_fw-la cylindri_fw-la atmosphaerae_fw-la pondus_fw-la aequalis_fw-la diametri_fw-la cum_fw-la embolo_fw-la reflectione_fw-la in_o fundum_fw-la emboli_n derivetur_fw-la cur_n non_fw-la quinque_fw-la alii_fw-la cylindri_fw-la aeris_fw-la qui_fw-la circumstant_fw-la embolum_fw-la in_o 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the_o atmosphere_n by_o its_o weight_n or_o the_o spring_n of_o the_o air_n compress_v by_o that_o weight_n shall_v be_v able_a to_o raise_v up_o fourscore_o or_o a_o hundred_o pound_n hang_v at_o the_o sucker_n since_o i_o have_v 165._o have_v see_v continuat_fw-la of_o new_a exper._n physico-mechan_a exp._n 48._o p._n 165._o manifest_v two_o or_o three_o year_n ago_o by_o a_o clear_a and_o cogent_a experiment_n that_o a_o little_a air_n include_v in_o a_o bladder_n will_v by_o its_o mere_a spring_n be_v able_a to_o heave_v up_o a_o weight_n of_o a_o hundred_o pound_n and_o this_o without_o the_o help_n of_o any_o rarefaction_n by_o heat_n by_o which_o experiment_n may_v be_v also_o confirm_v what_o i_o deliver_v a_o while_n since_o about_o the_o endeavour_n of_o the_o air_n that_o be_v wont_a to_o be_v include_v in_o our_o brass_n cylinder_n by_o expand_v itself_o to_o thrust_v away_o the_o sucker_n which_o in_o regard_n of_o the_o structure_n of_o the_o pump_n it_o can_v do_v no_o 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etc._n etc._n a_o hydrostatical_a letter_n write_v feb._n 13._o 167_o 2_o 3_o contain_v a_o dilucidation_n of_o a_o experiment_n of_o the_o honourable_a author_n of_o these_o tract_n about_o a_o way_n of_o weigh_v water_n in_o water_n upon_o the_o occasion_n of_o some_o exception_n make_v to_o it_o by_o mr._n george_n sinclaer_n ss_z sinclaer_n in_o his_o hydrostaticks_n print_v at_o edenburg_n 1672._o p._n 146._o ss_z to_o the_o reader_n when_o this_o discourse_n be_v just_a finish_v in_o the_o press_n there_o come_v to_o the_o publisher_n hand_n a_o dilucidation_n of_o a_o experiment_n of_o the_o honourable_a author_n of_o these_o tract_n about_o a_o contrivance_n of_o he_o for_o estimate_v the_o weight_n of_o water_n in_o water_n former_o publish_v in_o numb_a 50._o of_o the_o philosoph_n transaction_n and_o by_o the_o follow_a discourse_n clear_v from_o the_o exception_n to_o be_v meet_v with_o in_o mr._n george_n sinclair_n book_n entitle_v the_o hydrostaticks_n etc._n etc._n 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the_o perpendicular_a height_n of_o the_o water_n and_o it_o be_v very_o probable_a that_o in_o much_o high_a mountain_n the_o difference_n of_o the_o mercurial_a cylinder_n height_n at_o the_o top_n and_o bottom_n may_v be_v much_o great_a and_o at_o the_o bottom_n of_o some_o very_a deep_a well_o or_o mineral_n groove_v which_o may_v without_o improbability_n be_v suppose_v to_o be_v place_v at_o or_o near_o the_o foot_n of_o one_o of_o these_o mountain_n if_o we_o conceive_v the_o baroscope_n to_o be_v let_v down_o the_o variation_n of_o the_o height_n of_o the_o mercurial_a cylinder_n may_v be_v yet_o much_o more_o considerable_a and_o yet_o we_o find_v not_o that_o the_o digger_n in_o the_o deep_a mine_n in_o mountainous_a country_n be_v sensible_a of_o be_v lean_v on_o or_o compress_v by_o any_o unusual_a weight_n but_o not_o here_o to_o build_v on_o any_o thing_n but_o matter_n of_o fact_n it_o appear_v by_o the_o new_o name_v observation_n that_o when_o a_o man_n be_v at_o the_o bottom_n of_o the_o hill_n he_o have_v as_o much_o great_a weight_n of_o air_n lean_v upon_o his_o head_n than_o he_o have_v at_o the_o top_n as_o be_v equal_a to_o the_o height_n of_o a_o imaginary_a vessel_n full_a of_o water_n which_o have_v his_o head_n for_o basis_n be_v three_o foot_n and_o a_o half_a high_a which_o be_v so_o considerable_a a_o weight_n as_o can_v not_o but_o have_v be_v not_o only_o sensible_a but_o very_o troublesome_a and_o uneasy_a to_o support_v and_o what_o have_v be_v say_v of_o the_o gravity_n of_o a_o pail_n of_o water_n that_o lean_v on_o his_o head_n may_v be_v proportionable_o apply_v to_o his_o shoulder_n arm_n etc._n etc._n whence_o i_o think_v i_o may_v infer_v that_o the_o reason_n why_o such_o a_o weight_n be_v not_o feel_v by_o the_o man_n it_o compress_v be_v not_o that_o the_o air_n that_o press_v he_o be_v not_o considerable_a but_o that_o the_o pressure_n be_v exercise_v after_o the_o uniform_a manner_n of_o fluid_a body_n and_o this_o may_v suffice_v to_o show_v that_o there_o be_v no_o necessity_n that_o the_o compression_n of_o the_o atmosphere_n shall_v make_v it_o impossible_a to_o live_v in_o it_o but_o because_o it_o be_v observe_v that_o those_o that_o dive_v to_o great_a depth_n under_o water_n be_v not_o oppress_v by_o the_o great_a weight_n of_o the_o incumbent_a water_n and_o the_o cause_n of_o this_o strange_a phaenomenon_n be_v not_o so_o easy_a to_o be_v assign_v and_o therefore_o have_v be_v make_v one_o of_o the_o two_o grand_a argument_n whereon_o the_o non-gravitation_a of_o water_n in_o water_n and_o air_n in_o air_n have_v be_v and_o still_o remain_v found_v i_o shall_v here_o offer_v something_o ex_fw-la abundanti_fw-la towards_o the_o solution_n of_o that_o noble_a and_o difficult_a problem_n and_o first_o that_o what_o be_v observe_v by_o the_o divers_a do_v not_o evince_v that_o water_n do_v not_o weigh_v in_o water_n i_o have_v elsewhere_o paradox_n elsewhere_o see_v the_o hydrostatical_a paradox_n prove_v by_o such_o reason_n and_o experiment_n as_o have_v the_o good_a fortune_n to_o convince_v eminent_o learned_a man_n that_o be_v sufficient_o prepossess_v with_o the_o vulgar_a opinion_n and_o in_o the_o same_o treatise_n i_o have_v give_v a_o clear_a account_n why_o a_o bucket_n full_a of_o water_n be_v not_o feel_v considerable_o heavy_a whilst_o it_o be_v under_o water_n in_o comparison_n of_o what_o it_o be_v whilst_o it_o be_v draw_v up_o into_o the_o air_n which_o be_v the_o other_o phaenomenon_n that_o i_o fresh_o intimate_v the_o common_a opinion_n to_o be_v found_v on_o next_o i_o do_v not_o think_v it_o strange_a that_o that_o follow_v not_o which_o it_o be_v object_v shall_v follow_v from_o our_o hypothesis_n namely_o that_o a_o diver_n shall_v be_v violent_o depress_v to_o the_o bottom_n of_o the_o water_n by_o the_o weight_n of_o so_o great_a a_o pillar_n of_o the_o sea_n as_o be_v place_v perpendicular_o over_o his_o body_n for_o if_o we_o imagine_v a_o plane_n so_o to_o cut_v the_o sea-water_n as_o to_o pass_v by_o the_o divers_a body_n then_o as_o that_o part_n of_o the_o plane_n on_o which_o his_o body_n lean_v will_v be_v press_v by_o it_o together_o with_o the_o water_n that_o be_v perpendicular_o incumbent_a on_o it_o so_o all_o the_o other_o part_n of_o the_o same_o plane_n will_v be_v press_v by_o equal_o tall_a pillar_n of_o water_n perpendicular_o incumbent_a on_o they_o and_o consequent_o if_o the_o man_n body_n be_v just_o equiponderant_a to_o a_o equal_a bulk_n of_o water_n it_o and_o the_o water_n that_o lean_v on_o it_o will_v be_v sustain_v by_o the_o pressure_n of_o the_o collateral_a water_n incumbent_a on_o the_o other_o part_n of_o the_o same_o plane_n as_o may_v be_v easy_o understand_v by_o what_o i_o have_v elsewhere_o say_v paradox_n say_v see_v appendix_n to_o
of_o brass_n abovementioned_a we_o put_v a_o fine_a bladder_n tie_v so_o close_o at_o the_o neck_n that_o none_o of_o the_o air_n whereof_o it_o be_v about_o half_a full_a can_v probable_o get_v out_o which_o we_o do_v to_o the_o end_n that_o the_o hen-egge_n we_o be_v to_o bed_n in_o it_o may_v lie_v soft_a and_o have_v its_o side_n almost_o cover_v with_o the_o limber_a and_o flaccid_a bladder_n and_o contain_v air_n this_o do_v we_o cover_v the_o remain_a part_n of_o the_o egg_n with_o another_o bladder_n that_o nothing_o that_o be_v hard_a may_v come_v to_o bear_v immediate_o upon_o the_o shell_n then_o we_o put_v the_o wooden_a plugg_n into_o the_o cylinder_n and_o a_o weight_n upon_o the_o plugg_n which_o be_v to_o be_v do_v very_o slow_o and_o wary_o lest_o the_o quick_a descent_n of_o the_o weight_n shall_v make_v the_o plugg_n break_v the_o egg_n it_o lean_v on_o last_o the_o cylinder_n thus_o fit_v be_v cover_v with_o a_o large_a receiver_n and_o the_o air_n be_v draw_v out_o 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another_o of_o the_o same_o kind_n lay_v wary_o a_o while_n after_o small_a weight_n one_o upon_o another_o the_o egg_n be_v crush_v to_o piece_n by_o about_o four_o pound_n weight_n this_o experiment_n though_o it_o seem_v considerable_a to_o those_o that_o see_v it_o and_o may_v prevent_v a_o objection_n for_o which_o reason_n i_o here_o mention_v it_o yet_o will_v appear_v in_o no_o way_n strange_a to_o they_o that_o consider_v that_o the_o weight_n of_o the_o atmosphere_n which_o the_o egg_n support_v before_o it_o be_v put_v into_o the_o cylinder_n be_v more_o than_o equivalent_a to_o such_o a_o pressure_n of_o the_o air_n as_o may_v suffice_v to_o lift_v up_o the_o plugg_n wherefore_o i_o think_v fit_a to_o make_v further_a trial_n of_o a_o differ_a nature_n exp._n ii_o we_o take_v a_o glass-buble_n of_o about_o a_o inch_n and_o half_a in_o diameter_n which_o we_o cause_v to_o be_v blow_v at_o the_o flame_n of_o a_o lamp_n that_o it_o may_v be_v far_o more_o thin_a and_o easy_a to_o break_v than_o the_o thin_a vial_n that_o be_v wont_a to_o be_v blow_v in_o the_o glasser_n furnace_n this_o bubble_n we_o include_v between_o bladder_n as_o we_o do_v the_o egg_n in_o the_o former_a experiment_n and_o then_o have_v wary_o put_v the_o plugg_n into_o the_o cylinder_n so_o as_o it_o may_v press_v upon_o the_o bladder_n that_o environ_v the_o glass_n we_o leisurely_o put_v the_o weight_n upon_o the_o plugg_n till_o they_o together_o with_o the_o plugg_n amount_v to_o 30._o pound_n or_o more_o which_o be_v remove_v the_o plugg_n be_v take_v out_o and_o the_o glass-buble_n though_o it_o be_v extraordinary_o thin_a perhaps_o not_o thin_a than_o fine_a white_a paper_n be_v take_v out_o whole_a exp._n iii_o but_o lest_o the_o great_a resistance_n of_o so_o thin_a a_o glass_n which_o yet_o be_v not_o hermetical_o seal_v shall_v be_v ascribe_v to_o the_o sphaericalness_n of_o its_o figure_n we_o employ_v instead_o of_o it_o the_o shell_n of_o a_o egg_n whence_o by_o a_o 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