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part_n of_o the_o water_n soever_o it_o be_v place_v provide_v it_o be_v perfect_o environ_v with_o that_o liquor_n it_o must_v keep_v in_o the_o water_n which_o in_o this_o whole_a discourse_n we_o suppose_v to_o be_v homogeneous_a as_o to_o gravity_n the_o place_n you_o please_v to_o give_v it_o and_o to_o add_v that_o on_o this_o occasion_n though_o mathematician_n have_v hitherto_o content_v themselves_o to_o prove_v that_o in_o case_n a_o body_n can_v be_v find_v or_o provide_v that_o be_v exact_o equiponderant_a to_o water_n it_o will_v retain_v any_o assignable_a place_n in_o it_o yet_o the_o curiosity_n we_o have_v to_o give_v a_o experimental_a proof_n of_o this_o truth_n at_o length_n produce_v some_o glass_n bubble_n which_o some_o gentleman_n here_o present_a have_v not_o perhaps_o forget_v that_o be_v by_o a_o dexterous_a hand_n we_o employ_v about_o it_o so_o exquisite_o poise_v as_o to_o the_o wonder_n of_o the_o beholder_n to_o retain_v the_o place_n give_v they_o 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specie_fw-la equiponderant_fw-la to_o it_o yet_o i_o be_o so_o far_o from_o think_v it_o absurd_a that_o the_o inferior_a corpuseles_o of_o water_n shall_v be_v perpetual_o in_o motion_n that_o i_o see_v not_o how_o otherwise_o they_o can_v constitute_v a_o fluid_a body_n that_o restless_a motion_n of_o their_o part_n be_v one_o of_o the_o generale_a attribute_n of_o liquor_n and_o be_v in_o water_n though_o not_o immediate_o to_o be_v see_v yet_o to_o be_v easy_o discover_v by_o its_o effect_n as_o when_o salt_n be_v cast_v into_o water_n the_o aqueous_a part_n that_o be_v contiguous_a to_o it_o and_o consequent_o near_a to_o the_o bottom_n do_v soon_o carry_v up_o many_o of_o the_o faline_a one_o to_o the_o very_a top_n of_o the_o water_n where_o after_o a_o while_n they_o be_v wont_n to_o disclose_v themselves_o in_o little_a float_a grain_n of_o a_o cubical_a shape_n but_o of_o this_o restless_a motion_n of_o the_o part_n of_o liquor_n have_v profess_o treat_v elsewhere_o already_o 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place_v deep_a under_o water_n will_v sink_v in_o it_o if_o the_o superior_a water_n that_o gravitates_fw-la on_o it_o do_v not_o contribute_v to_o its_o depression_n appendix_n ii_o concern_v the_o reason_n why_o divers_a and_o other_o who_o descend_v to_o the_o bottom_n of_o the_o sea_n be_v not_o oppress_v by_o the_o weight_n of_o the_o incumbent_a water_n among_o the_o difficulty_n that_o belong_v to_o the_o hydrostaticks_n there_o be_v one_o which_o be_v so_o noble_a and_o which_o do_v still_o so_o much_o both_o exercise_n and_o pose_v the_o wit_n of_o the_o curious_a that_o perchance_o it_o will_v not_o be_v unacceptable_a if_o to_o the_o former_a experiment_n we_o add_v by_o way_n of_o appendix_n one_o that_o may_v conduce_v to_o the_o solve_v of_o this_o difficult_a problem_n viz._n why_o man_n deep_a under_o water_n feel_v no_o inconvenience_n by_o the_o pressure_n of_o so_o great_a a_o weight_n of_o water_n as_o they_o be_v place_v under_o the_o common_a answer_n of_o philosopher_n and_o other_o writer_n to_o this_o puzzle_v question_n be_v that_o the_o element_n do_v not_o gravitate_fw-la in_o their_o own_o proper_a place_n and_o so_o water_n in_o particular_a have_v no_o gravitation_n upon_o water_n nor_o consequent_o upon_o body_n every_o way_n surround_v with_o water_n but_o that_o this_o solution_n be_v not_o to_o be_v admit_v may_v be_v easy_o gather_v from_o our_o proof_n of_o the_o first_o paradox_n and_o from_o divers_a other_o particular_n applicable_a to_o the_o same_o purpose_n that_o may_v be_v meet_v with_o in_o the_o forego_n paper_n a_o famous_a writer_n and_o for_o aught_o i_o know_v the_o recent_a except_o monsieur_n paschal_n that_o have_v treat_v of_o hydrostaticks_n have_v render_v this_o reason_n of_o the_o phaenomenon_n the_o superior_a part_n of_o consistent_a water_n as_o he_o speak_v press_v not_o the_o inferior_a unless_o beneath_o the_o inferior_a there_o be_v a_o body_n light_a in_o specie_fw-la then_o water_n and_o therefore_o since_o a_o humane_a body_n be_v heavy_a in_o specie_fw-la then_o water_n it_o be_v not_o press_v by_o the_o incumbent_a water_n because_o this_o do_v not_o endeavour_v to_o be_v beneath_o a_o humane_a body_n he_o subjoin_v contrary_a to_o his_o custom_n this_o confident_a epiphonema_n qui_fw-la aliam_fw-la causam_fw-la huius_fw-la rei_fw-la assignant_fw-la errant_a &_o alios_fw-la decipiunt_fw-la but_o by_o his_o favour_n notwithstanding_o this_o confidence_n i_o shall_v not_o scruple_n to_o seek_v another_o reason_n of_o the_o phaenomenon_n for_o i_o have_v abundant_o prove_v that_o contrary_a to_o the_o assertion_n on_o which_o his_o explication_n be_v build_v the_o upper_a part_n of_o water_n press_v against_o the_o low_a whether_o a_o body_n heavy_a or_o light_a in_o specie_fw-la then_o water_n be_v underneath_o the_o low_a and_o the_o contrary_a of_o which_o be_v the_o 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d in_o this_o controversy_n perhaps_o the_o matter_n may_v be_v 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your_o hand_n that_o you_o will_v imagine_v some_o ponderous_a weight_n be_v lay_v upon_o it_o and_o i_o remember_v by_o such_o a_o experiment_n i_o have_v not_o only_o have_v my_o hand_n put_v to_o much_o pain_n but_o have_v have_v the_o back_n of_o it_o so_o bend_v downward_o as_o if_o it_o be_v go_v to_o be_v break_v but_o though_o such_o consideration_n as_o these_o may_v much_o lessen_v the_o difficulty_n of_o our_o phaenomenon_n who_o cause_n be_v inquire_v into_o yet_o still_o it_o seem_v somewhat_o odd_a to_o i_o that_o since_o it_o be_v evident_a from_o the_o nature_n of_o the_o thing_n and_o by_o stevinus_n his_o confession_n that_o there_o be_v a_o vast_a pressure_n of_o water_n against_o every_o part_n of_o the_o body_n who_o endeavour_n tend_v inward_a so_o exceed_o forcible_a a_o pressure_n which_o thrust_v for_o instance_n the_o muscle_n of_o the_o arm_n and_o thigh_n against_o the_o bone_n the_o skin_n and_o flesh_n of_o the_o thorax_n against_o the_o rib_n shall_v 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and_o some_o inch_n of_o air_n be_v leave_v in_o the_o pipe_n for_o the_o use_n anon_o to_o be_v mention_v the_o water_n and_o air_n and_o consequent_o the_o tadpole_n be_v by_o the_o intrusion_n of_o the_o plug_n or_o rammer_n with_o as_o great_a a_o force_n as_o a_o man_n be_v able_a to_o employ_v violent_o compress_v and_o yet_o though_o the_o tadpole_n seem_v to_o be_v compress_v into_o a_o little_a less_o bulk_n than_o it_o be_v of_o before_o it_o swim_v free_o up_o and_o down_o the_o water_n without_o forbear_v sometime_o to_o ascend_v to_o the_o very_a top_n though_o the_o instrument_n be_v hold_v perpendicular_a to_o the_o horizon_n nor_o do_v it_o clear_o appear_v to_o we_o that_o the_o little_a animal_n be_v injure_v by_o this_o compression_n and_o most_o manifest_a it_o be_v he_o be_v not_o crush_v to_o death_n or_o sensible_o hurt_v by_o it_o and_o have_v repeat_v this_o experiment_n several_a time_n &_o with_o tadpole_n of_o differ_v age_n we_o may_v i_o presume_v safe_o conclude_v that_o the_o texture_n of_o animal_n be_v so_o strong_a that_o though_o water_n be_v allow_v to_o weigh_v upon_o water_n yet_o a_o diver_n ought_v not_o to_o be_v oppress_v by_o it_o since_o whether_o or_o no_o water_n weigh_v in_o water_n it_o be_v manifest_a that_o in_o our_o experiment_n the_o water_n and_o consequent_o the_o tadpole_n be_v very_o forcible_o by_o a_o external_n agent_n compress_v betwixt_o the_o violent_o condense_v air_n and_o the_o rammer_n and_o by_o the_o notice_n we_o take_v of_o the_o quantity_n of_o air_n before_o the_o compression_n begin_v and_o that_o to_o which_o it_o be_v reduce_v by_o compression_n the_o moderate_v estimate_n we_o can_v make_v be_v that_o it_o be_v reduce_v into_o a_o eight_o or_o ten_o part_n of_o its_o former_a space_n and_o so_o according_a to_o what_o we_o have_v elsewhere_o prove_v the_o pressure_n that_o be_v upon_o the_o air_n and_o consequent_o upon_o the_o water_n and_o the_o include_v tadpole_n be_v as_o great_a as_o that_o of_o a_o cylinder_n of_o water_n of_o above_o 200_o if_o not_o 300_o foot_n high_a and_o yet_o all_o this_o weight_n be_v unable_a to_o oppress_v or_o so_o much_o as_o manifest_o to_o hurt_v the_o tender_a tadpole_n which_o a_o very_a small_a weight_n will_v suffice_v to_o have_v crush_v if_o it_o press_v only_o upon_o one_o part_n of_o it_o and_o not_o upon_o the_o other_o we_o may_v thence_o learn_v the_o truth_n of_o what_o we_o have_v be_v endeavour_v to_o evince_v that_o though_o water_n be_v allow_v to_o press_v against_o water_n and_o all_o immersed_a body_n yet_o a_o diver_n may_v very_o well_o remain_v unoppress_v at_o a_o great_a depth_n under_o water_n as_o long_o as_o the_o pressure_n of_o it_o be_v uniform_a against_o all_o the_o part_n expose_v thereunto_o finis_fw-la finis_fw-la about_o this_o passage_n see_v the_o publisher_n to_o the_o reader_n reader_n chief_o in_o several_a place_n of_o the_o unpublished_a part_n of_o the_o treatise_n of_o the_o osefulness_n of_o experimental_a philosophy_n philosophy_n a_o account_n of_o this_o passage_n also_o may_v be_v have_v from_o the_o publisher_n advertisement_n to_o the_o reader_n reader_n that_o excellent_a mathematician_n the_o learned_a dr_n wallis_n savilian_n professor_n of_o geometry_n this_o experiment_n and_o the_o explication_n of_o it_o if_o to_o some_o they_o shall_v here_o seem_v somewhat_o obscure_a will_v be_v easy_o understand_v by_o the_o figure_n and_o explication_n belong_v to_o the_o first_o ensue_a paradox_n see_v the_o second_o figure_n in_o certain_a note_n upon_o some_o of_o the_o physics-mechanical_a experiment_n touch_v the_o air_n fig._n 3._o fig._n 1._o 2._o fig._n 4._o fig._n 5._o see_v paradox_n the_o six_o fig._n 6._o fig._n 8._o figur_n 9_o fig._n 10._o fig._n 11._o see_v fig._n 12._o fig._n 13._o fig._n 14._o see_v the_o proof_n of_o the_o 11._o paradox_n fig._n 15._o fig._n 16._o fig._n 17._o fig._n 18._o in_o the_o physicomechanical_a experiment_n fig._n 19_o 19_o the_o word_n about_o be_v add_v because_o indeed_o the_o author_n as_o he_o elsewhere_o deliver_v do_v by_o exact_a scale_n find_v brass_n to_o weigh_v between_o eight_o or_o nine_o time_n as_o much_o as_o water_n but_o judge_v it_o needless_a to_o his_o present_a argument_n and_o inconvenient_a to_o take_v notice_n of_o the_o fraction_n fig._n 20._o in_o the_o history_n of_o fluidity_n &_o firmness_n second_o tom_n lettre_fw-fr 32._o fig._n 22._o stevinus_n hydrostat_fw-la lib._n 5._o pag._n 149._o sed_fw-la exemple_n clarius_fw-la ita_fw-la intelliges_fw-la este_fw-la abcd_n aqua_fw-la cujus_fw-la fundum_fw-la d_o c_o in_fw-la quo_fw-la foramen_fw-la e_o habeat_fw-la epistimeus_n sibi_fw-la iesertum_fw-la cui_fw-la dorso_n incumbat_fw-la homo_fw-la f_o quae_fw-la cum_fw-la ita_fw-la fiat_fw-la ab_fw-la aqua_fw-la pondere_fw-la ipsi_fw-la insidente_fw-la nulla_fw-la pars_fw-la corporis_fw-la luxari_fw-la poterit_fw-la cum_fw-la aqua_fw-la ut_fw-la dictus_fw-la est_fw-la undiquaque_fw-la aqualiter_fw-la urgeat_fw-la fig._n 23._o si_fw-mi vero_fw-la ejus_fw-la veritatem_fw-la explorare_fw-la libeat_fw-la eximito_fw-la epistemiun_n tumque_fw-la tergum_fw-la nulla_fw-la re_fw-la fultum_fw-la sustinebitur_fw-la ut_fw-la in_o locis_fw-la cateris_fw-la ideoque_fw-la istic_fw-la tanto_fw-la pressu_fw-la afficietur_fw-la quantus_fw-la tertio_fw-la exemple_n secunda_fw-la propositionis_fw-la huius_fw-la demonstratus_fw-la est_fw-la vidquantam_fw-la efficit_fw-la columna_fw-la aquea_fw-la cujus_fw-la basis_n sit_fw-la foramica_fw-la e_z altitudo_fw-la autem_fw-la eadem_fw-la quae_fw-la aqua_fw-la ipsi_fw-la insidentis_fw-la quo_fw-la exemplo_fw-la propositi_fw-la veritas_fw-la manifest_a declaratur_fw-la fig._n 24._o