to_o take_v something_o more_o than_o half_a of_o the_o height_n of_o the_o cylinder_n of_o wood_n namely_o such_o a_o quantity_n thereof_o as_o be_v commensurate_a to_o a_o quantity_n of_o water_n equal_a in_o weight_n to_o the_o whole_a weight_n of_o the_o cylinder_n of_o wood_n the_o cylinder_n of_o wood_n will_v not_o swim_v but_o will_v stand_v upon_o its_o base_a at_o the_o bottom_n of_o the_o vessel_n and_o this_o be_v the_o reason_n why_o a_o ship_n or_o vessel_n that_o draw_v for_o the_o purpose_n 4_o fathom_n of_o water_n will_v swim_v in_o a_o narrow_a cut_n or_o channel_n that_o have_v 5_o or_o 6_o fathom_n of_o water_n though_o the_o channel_n be_v less_o than_o 20_o fathom_n over_o in_o breadth_n and_o if_o the_o channel_n be_v 20_o mile_n over_o and_o of_o a_o less_o depth_n than_o the_o ship_n draught_n of_o water_n viz._n 4_o fathom_n the_o ship_n will_v be_v on_o ground_n and_o will_v not_o swim_v and_o yet_o the_o weight_n and_o quantity_n of_o whole_a water_n in_o the_o broad_a channel_n be_v many_o thousand_o time_n more_o than_o that_o in_o the_o narrow_a channel_n and_o the_o like_a instance_n may_v be_v give_v in_o float_v of_o timber_n in_o a_o deep_a and_o narrow_a channel_n and_o a_o broad_a and_o shallow_a channel_n for_o the_o pressure_n of_o water_n be_v more_o or_o less_o according_a to_o the_o height_n or_o depth_n of_o water_n and_o not_o according_a to_o its_o amplitude_n or_o breadth_n though_o the_o water_n with_o ample_a superficies_n be_v a_o thousand_o time_n more_o in_o weight_n and_o bulk_n than_o the_o deep_a water_n now_o to_o the_o bucket_n instance_a in_o the_o remark_n if_o there_o be_v a_o bucket_n of_o 20_o inch_n diameter_n and_o another_o of_o equal_a height_n but_o of_o 6_o inch_n diameter_n fill_v the_o lesser_a bucket_n with_o water_n and_o place_n it_o in_o the_o middle_n of_o the_o great_a bucket_n and_o then_o fill_v the_o circumjacent_a side_n of_o the_o great_a bucket_n with_o water_n though_o the_o great_a bucket_n hold_v 5_o time_n the_o water_n of_o the_o lesser_a bucket_n yet_o allow_v as_o i_o must_v the_o wood_n of_o the_o lesser_a bucket_n to_o be_v but_o of_o the_o same_o weight_n with_o the_o like_a mole_n of_o water_n the_o lesser_a bucket_n will_v still_o remain_v contiguous_a to_o the_o bottom_n and_o will_v not_o rise_v one_o inch_n and_o the_o reason_n be_v because_o the_o water_n without_o and_o the_o water_n within_o the_o bucket_n though_o of_o a_o different_a mole_n yet_o have_v the_o same_o specifical_a weight_n and_o as_o to_o this_o purpose_n as_o if_o it_o be_v so_o much_o unvessele_v water_n i_o say_v as_o to_o this_o purpose_n for_o as_o to_o the_o other_o purpose_n there_o will_v be_v a_o difference_n as_o i_o shall_v show_v hereafter_o but_o if_o the_o lesser_a bucket_n be_v total_o empty_a or_o only_o fill_v part_n with_o water_n suppose_v half_a way_n than_o the_o water_n in_o the_o great_a bucket_n will_v drive_v up_o the_o lesser_a but_o not_o till_o only_o so_o much_o be_v immerse_v as_o countervail_v its_o defect_n of_o weight_n according_a to_o the_o 4_o the_o 5_o the_o and_o 6_o the_o proposition_n of_o archimedes_n ubi_fw-la supra_fw-la but_o now_o to_o come_v to_o the_o experiment_n of_o the_o lesser_a bucket_n or_o cylindraceous_a vessel_n perforate_v in_o the_o bottom_n and_o then_o water_v pour_v into_o the_o great_a or_o lesser_a for_o it_o come_v all_o to_o one_o account_n will_v the_o lesser_a bucket_n emerge_n unless_o hold_v down_o by_o the_o hand_n by_o no_o mean_n in_o the_o world_n for_o the_o water_n will_v present_o pass_v through_o the_o perforation_n from_o one_o bucket_n to_o the_o other_o till_o they_o come_v to_o one_o common_a superficial_a height_n and_o still_o the_o lesser_a bucket_n will_v rest_v upon_o the_o base_a of_o the_o great_a because_o they_o have_v a_o equipondium_fw-la suppose_v as_o we_o must_v that_o the_o wood_n of_o the_o lesser_a bucket_n be_v of_o equal_a specifical_a weight_n to_o the_o like_a mole_n of_o water_n indeed_o it_o be_v true_a that_o if_o the_o hole_n be_v small_a so_o that_o there_o must_v be_v a_o mora_n before_o the_o water_n can_v be_v convey_v from_o one_o vessel_n to_o another_o then_o if_o the_o water_n be_v plentiful_o pour_v into_o the_o side_n of_o the_o great_a bucket_n the_o lesser_a will_v rise_v till_o it_o have_v receive_v so_o much_o water_n as_o equal_v the_o superficies_n of_o both_o and_o then_o the_o lesser_a bucket_n will_v subside_o contiguous_a to_o the_o base_a for_o the_o water_n in_o both_o bucket_n be_v of_o a_o equal_a height_n be_v in_o aequipendio_fw-la so_o that_o as_o the_o instance_n itself_o conduce_v little_a to_o the_o end_v propound_v be_v it_o true_a so_o i_o doubt_v it_o be_v mistake_v and_o upon_o trial_n will_v not_o be_v find_v true_a i_o do_v expect_v to_o have_v meet_v with_o a_o objection_n which_o may_v seem_v prima_fw-la fancy_n to_o impugn_v what_o i_o have_v former_o deliver_v yet_o upon_o a_o strict_a examination_n it_o will_v not_o have_v any_o efficacy_n take_v a_o cube_n or_o cylinder_n of_o wood_n of_o equal_a intrinsic_a weight_n with_o so_o much_o water_n suppose_v it_o a_o cube_n of_o six_o inch_n diameter_n and_o put_v it_o into_o a_o cylinder_n or_o cubique_fw-la vessel_n of_o water_n of_o eight_o inch_n deep_a and_o twelve_o inch_n diameter_n this_o cube_n or_o cylinder_n will_v rest_v two_o inch_n above_o the_o base_a of_o the_o vessel_n and_o will_v not_o gravitate_fw-la either_o upon_o the_o two_o inch_n of_o water_n in_o the_o base_a of_o the_o vessel_n nor_o upon_o any_o body_n that_o be_v but_o two_o inch_n thick_a and_o lay_v between_o the_o cube_n and_o the_o base_a of_o the_o vessel_n of_o water_n yet_o here_o can_v be_v no_o lateral_a pressure_n or_o per_fw-la declive_a in_o the_o cube_n itself_o be_v solid_a and_o have_v only_o a_o central_a gravitation_n so_o that_o it_o may_v seem_v the_o lateral_a pressure_n which_o be_v the_o subject_a of_o the_o eight_o chapter_n of_o the_o essay_n apply_v to_o the_o water_n be_v no_o ingredient_n into_o its_o non-gravitation_a i_o answer_v that_o the_o fact_n be_v true_a but_o the_o illation_n thereupon_o be_v not_o consequential_a in_o my_o observation_n upon_o the_o 4_o the_o 5_o the_o and_o 7_o the_o remark_n i_o say_v the_o non-gravitation_a of_o fluids_n be_v in_o relation_n to_o the_o pressure_n of_o the_o upper_a part_n upon_o the_o low_a which_o be_v per_fw-la declive_a premendo_fw-la and_o in_o relation_n of_o the_o low_a part_n to_o the_o upper_a sustinendo_fw-la now_o although_o in_o this_o instance_n the_o former_a have_v no_o part_n yet_o the_o latter_a have_v in_o this_o instance_n the_o cube_n or_o cylinder_n be_v sustain_v and_o bear_v up_o by_o the_o subjacent_a water_n which_o be_v as_o the_o pedestal_n upon_o which_o it_o be_v bottom_v and_o therefore_o neither_o do_v nor_o can_v press_v below_o the_o position_n it_o hold_v but_o suppose_v the_o body_n subjacent_a to_o it_o be_v 6_o inch_n deep_a than_o it_o will_v be_v under_o the_o pressure_n of_o that_o cylinder_n or_o cube_n of_o wood_n as_o much_o as_o the_o weight_n of_o 4_o inch_n of_o the_o cube_n amount_v to_o in_o the_o water_n and_o the_o body_n will_v be_v under_o a_o pressure_n commensurate_a at_o least_o to_o so_o much_o weight_n as_o the_o cube_n or_o so_o much_o thereof_o as_o be_v thereby_o drive_v out_o of_o the_o superficies_n of_o the_o water_n exceed_v in_o its_o extrinsic_a weight_n the_o like_a mole_n of_o water_n with_o so_o much_o of_o the_o cube_n as_o lie_v in_o the_o water_n but_o on_o the_o other_o side_n where_o there_o be_v nothing_o impend_v upon_o the_o subjacent_a body_n but_o the_o superior_a imaginary_a column_n of_o water_n the_o subject_v body_n be_v not_o compress_v at_o 9_o 6_o or_o 3_o inch_n immersion_n below_o the_o superficies_n of_o the_o water_n partly_o by_o reason_n of_o the_o mechanism_n i_o do_v not_o say_v masonry_n of_o the_o water_n though_o that_o expression_n be_v frequent_o but_o needless_o use_v by_o the_o remarker_n and_o partly_o by_o reason_n of_o the_o various_a termination_n of_o the_o motion_n of_o fluid_a body_n it_o shall_v not_o be_v altogether_o impertinent_a to_o subjoin_v the_o ensue_a experiment_n i_o take_v a_o cube_n of_o wood_n 4_o inch_n square_a and_o very_o near_o of_o a_o equal_a specific_a weight_n of_o the_o like_a mole_n of_o water_n for_o it_o do_v not_o rise_v half_o a_o inch_n above_o the_o water_n and_o be_v let_v down_o to_o subside_o free_o in_o a_o vessel_n brimful_a of_o water_n it_o throw_v over_o a_o portion_n of_o water_n very_o near_o of_o the_o same_o weight_n with_o itself_o viz._n 28_o ounce_n and_o a_o half_a this_o cube_n be_v lay_v into_o a_o vessel_n of_o 8_o inch_n deep_a of_o
strictness_n of_o the_o juncture_n either_o by_o the_o quantity_n of_o oil_n or_o position_n of_o the_o rundle_n wherein_o i_o can_v not_o possible_o be_v exact_o uniform_a yet_o the_o rundle_n be_v separate_v under_o tnat_fw-la mole_n of_o water_n sometime_o with_o seven_o ounce_n weight_n sometime_o with_o eight_o but_o at_o most_o with_o ten_o ounce_n and_o yet_o in_o the_o column_n of_o water_n commensurate_n to_o the_o rundle_n be_v 55_o square_a inch_n which_o according_a to_o the_o exact_a computation_n of_o the_o weight_n of_o water_n amount_v to_o at_o least_o 24_o ounce_n weight_n and_o this_o show_v that_o gravitation_n of_o the_o water_n upon_o the_o rundle_n be_v to_o be_v understand_v when_o there_o be_v some_o passage_n to_o give_v the_o water_n motion_n so_o that_o it_o seem_v to_o i_o the_o conclusion_n that_o the_o remarker_n make_v from_o this_o instance_n in_o favour_n of_o the_o hylarchical_a principle_n or_o the_o suppose_a gravitation_n of_o a_o cylinder_n of_o water_n upon_o the_o rundle_n where_o no_o water_n pass_v must_v be_v lay_v aside_o as_o no_o way_n assist_v his_o hypothesis_n in_o impugn_v i_o and_o therefore_o whereas_o stevinus_n in_o his_o practical_a hydrostatique_n ubi_fw-la supra_fw-la grant_n that_o the_o body_n of_o a_o man_n or_o other_o body_n lie_v flat_a upon_o the_o bottom_n of_o a_o great_a vessel_n of_o water_n feel_v no_o considerable_a pressure_n of_o the_o incumbent_a water_n yet_o if_o there_o be_v a_o hole_n in_o the_o bottom_n of_o the_o vessel_n under_o that_o body_n it_o shall_v find_v a_o considerable_a pressure_n of_o the_o incumbent_a water_n this_o be_v to_o be_v understand_v cum_fw-la grano_fw-la salis_n viz._n if_o the_o body_n do_v not_o so_o entire_o and_o close_o stop_v the_o orifice_n in_o the_o bottom_n of_o the_o vessel_n but_o that_o the_o water_n find_v a_o passage_n between_o it_o and_o the_o base_a to_o discharge_v itself_o the_o body_n then_o indeed_o shall_v find_v a_o pressure_n from_o the_o superior_a water_n at_o least_o according_a to_o the_o weight_n of_o such_o a_o column_n of_o water_n as_o can_v thus_o discharge_v itself_o between_o the_o body_n and_o bottom_n through_o the_o orifice_n but_o if_o it_o stop_v the_o orifice_n so_o entire_o and_o close_o that_o no_o water_n can_v pass_v that_o way_n there_o will_v ensue_v no_o gravitation_n upon_o the_o body_n by_o reason_n of_o that_o hole_n or_o orifice_n thus_o stop_v for_o it_o be_v as_o if_o it_o be_v not_o the_o body_n become_v as_o it_o be_v part_n of_o the_o entire_a close_a base_a of_o the_o vessel_n and_o thus_o much_o may_v serve_v to_o explicate_v the_o phaenomenon_n of_o the_o orifice_n or_o hole_n in_o the_o base_a of_o a_o vessel_n under_o the_o rundle_n but_o now_o as_o to_o the_o instance_n give_v in_o the_o 20_o the_o remark_n whereunto_o the_o learned_a remarker_n appeal_v as_o a_o irrefragable_a instance_n to_o take_v away_o at_o once_o the_o mechanical_a account_n of_o continuity_n and_o architecture_n i_o doubt_v the_o author_n give_v we_o this_o experiment_n without_o exact_a trial_n for_o if_o he_o have_v try_v it_o i_o think_v he_o will_v never_o have_v urge_v it_o the_o experiment_n as_o i_o take_v it_o be_v this_o take_v a_o cylindraceous_a bucket_n of_o 63_o part_n in_o the_o internal_a diameter_n and_o let_v another_o cylindraceous_a bucket_n be_v of_o 62_o part_n external_a diameter_n with_o 4_o slope_v hole_n at_o the_o bottom_n and_o put_v the_o less_o into_o the_o great_a and_o fill_v they_o up_o with_o water_n to_o the_o brim_n then_o take_v away_o your_o hand_n and_o the_o narrow_a bucket_n will_v emerge_n leave_v no_o more_o in_o the_o water_n than_o what_o be_v equal_a to_o the_o weight_n of_o such_o a_o mole_n of_o water_n as_o be_v equal_a to_o the_o whole_a vessel_n in_o weight_n i_o shall_v take_v this_o instance_n in_o piece_n and_o then_o we_o shall_v see_v what_o be_v in_o it_o and_o for_o the_o better_a clear_n of_o it_o i_o shall_v make_v my_o way_n to_o it_o by_o instance_n though_o not_o altogether_o like_v it_o yet_o give_v a_o great_a light_n to_o it_o and_o it_o may_v be_v to_o other_o matter_n of_o this_o kind_n and_o i_o shall_v first_o consider_v the_o comparison_n between_o body_n specifical_o heavy_a than_o the_o fluid_n and_o then_o in_o body_n specifical_o light_a if_o there_o be_v a_o bucket_n or_o a_o cylindraceous_a vessel_n suppose_v 9_o inch_n deep_a then_o take_v a_o cylinder_n of_o 9_o inch_n high_a and_o narrow_a than_o the_o bucket_n but_o of_o a_o material_a specifical_o heavy_a than_o the_o like_a mole_n of_o water_n as_o suppose_v it_o tin_n or_o ebony_n if_o the_o vessel_n be_v fill_v with_o a_o mole_n of_o water_n of_o twice_o or_o thrice_o or_o ten_o time_n the_o extrinsic_a weight_n of_o that_o cylinder_n yet_o the_o cylinder_n will_n still_o sink_v to_o the_o bottom_n by_o its_o advantage_n of_o its_o intrinsic_a or_o specifical_a over-weight_n or_o heaviness_n more_o than_o water_n now_o i_o shall_v consider_v the_o proportion_n where_o the_o solid_a body_n be_v specifical_o light_a than_o water_n or_o other_o fluid_a body_n in_o which_o it_o be_v immerse_v i_o take_v a_o cylinder_n of_o wood_n 4_o inch_n deep_a and_o 4_o inch_n diameter_n which_o weigh_v 18_o ounce_n the_o like_a bulk_n of_o water_n equal_a in_o bulk_n to_o that_o cylinder_n of_o wood_n weigh_v 32_o ounce_n so_o that_o the_o water_n have_v a_o specifical_a or_o intrinsic_a weight_n near_o double_a to_o the_o wood._n and_o consequent_o the_o wood_n be_v immerse_v in_o a_o vessel_n of_o water_n near_o one_o half_a thereof_o lay_v above_o the_o superficies_n of_o the_o water_n as_o it_o must_v do_v according_a to_o the_o rule_n of_o hydrostatiques_n i_o take_v 2_o cylindrous_a vessel_n one_o of_o 6_o inch_n diameter_n the_o other_o of_o 9_o inch_n diameter_n i_o put_v the_o cylinder_n of_o wood_n into_o the_o vessel_n of_o 6_o inch_n diameter_n and_o as_o much_o water_n as_o countervail_v the_o wood-cylind_a in_o extrinsic_a weight_n but_o not_o in_o bulk_n and_o the_o wood-cylind_a will_v not_o swim_v for_o though_o the_o intrinsic_a weight_n of_o the_o water_n be_v near_o double_a to_o the_o weight_n of_o the_o wood_n yet_o the_o extrinsic_a weight_n of_o both_o be_v equal_a viz_o 18_o ounce_n and_o so_o there_o be_v a_o equipondium_fw-la between_o the_o water_n and_o the_o wood_n and_o consequent_o that_o water_n will_v not_o raise_v the_o wood_n from_o the_o base_a of_o the_o vessel_n but_o put_v in_o so_o much_o water_n more_o into_o that_o vessel_n as_o that_o the_o lateral_a or_o ambient_fw-la water_n will_v rise_v so_o high_a as_o to_o cover_v a_o little_a more_o than_o one_o half_a of_o the_o cylinder_n of_o wood_n namely_o such_o a_o quantity_n thereof_o as_o be_v equal_a to_o a_o mole_n of_o water_n equiponderate_v the_o weight_n of_o the_o whole_a cylinder_n of_o wood_n than_o the_o cylinder_n of_o wood_n will_v swim_v though_o the_o base_a of_o the_o water_n between_o the_o cylinder_n of_o wood_n and_o the_o bottom_n of_o the_o vessel_n have_v not_o half_a a_o inch_n in_o depth_n and_o the_o reason_n be_v because_o the_o entire_a water_n both_o lateral_a and_o at_o the_o bottom_n be_v one_o continue_a body_n and_o entire_o press_v the_o cylinder_n of_o wood_n upward_o in_o as_o much_o as_o the_o lateral_a or_o ambient_fw-la water_n have_v gain_v a_o height_n upon_o the_o cylinder_n somewhat_o more_o than_o the_o immersed_a part_n of_o the_o cylinder_n of_o wood_n proportionable_a to_o a_o mole_n of_o water_n equal_a to_o the_o whole_a weight_n which_o that_o whole_a cylinder_n of_o wood_n amount_v unto_o for_o the_o cylinder_n of_o wood_n weigh_v but_o 18_o ounce_n but_o the_o whole_a weight_n of_o the_o water_n may_v be_v 20_o ounce_n or_o more_o but_o again_o put_v this_o cylinder_n of_o wood_n into_o the_o cylindrous_a vessel_n or_o bucket_n of_o 9_o inch_n diameter_n close_o to_o the_o base_a and_o pour_v in_o four_o or_o five_o time_n the_o quantity_n of_o water_n into_o the_o bucket_n more_o than_o what_o be_v in_o the_o former_a cylindrous_a vessel_n of_o six_o inch_n diameter_n as_o suppose_v it_o be_v five_o pound_n of_o water_n yet_o unless_o the_o superficies_n of_o that_o water_n rise_v not_o to_o more_o than_o the_o height_n of_o half_a the_o cylinder_n of_o wood_n viz._n something_o more_o than_o two_o inch_n high_a upon_o the_o side_n the_o cylinder_n of_o wood_n will_v rest_v upon_o the_o base_a and_o will_v not_o swim_v and_o the_o reason_n be_v because_o the_o water_n press_v according_a to_o its_o altitude_n and_o not_o according_a to_o its_o amplitude_n and_o therefore_o though_o the_o whole_a water_n in_o the_o 9_o inch_n bucket_n be_v five_o time_n more_o in_o weight_n than_o the_o cylinder_n of_o wood_n be_v if_o it_o rise_v not_o so_o high_a as_o
water_n therefore_o be_v raise_v at_o his_o base_a about_o 4_o inch_n above_o the_o water_n in_o the_o base_a of_o the_o vessel_n which_o water_n sustain_v it_o and_o now_o it_o have_v be_v unquestionable_a that_o if_o a_o body_n of_o less_o than_o 4_o inch_n thick_a have_v be_v subject_v under_o the_o cube_n it_o will_v have_v sustain_v no_o pressure_n from_o the_o water_n nor_o from_o the_o cube_n which_o be_v entire_o bear_v up_o to_o that_o height_n by_o the_o subjacent_a water_n but_o if_o the_o body_n subject_v to_o the_o cube_n have_v be_v 5_o 6_o or_o 7_o inch_n thick_a it_o will_v have_v be_v press_v upon_o by_o various_a proportion_n from_o the_o impend_a cube_n for_o fix_v a_o string_n and_o hook_n to_o the_o middle_n of_o the_o superficies_n of_o the_o cube_n it_o require_v near_o 12_o ounce_n in_o the_o opposite_a scale_n to_o raise_v the_o superficies_n 2_o inch_n above_o the_o water_n near_o 20_o ounce_n to_o raise_v it_o 3_o inch_n above_o the_o water_n and_o near_o 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so_o heavy_a as_o the_o like_a globe_n or_o cube_n of_o water_n weigh_v for_o the_o purpose_n 13_o pound_n and_o be_v immerse_v into_o a_o vessel_n of_o water_n ten_o or_o twenty_o foot_n square_a which_o be_v fill_v with_o water_n only_o to_o two_o inch_n deep_a though_o this_o water_n be_v of_o a_o intrinsic_a double_a weight_n to_o the_o cube_n or_o globe_n of_o wood_n and_o extrinsecal_o it_o may_v be_v above_o forty_o time_n more_o weighty_a than_o that_o cube_n or_o globe_n of_o wood_n yet_o that_o cube_n or_o globe_n of_o wood_n will_v subside_o to_o the_o base_a of_o the_o vessel_n or_o rest_v there_o in_o contiguity_n to_o it_o without_o any_o swim_n or_o bear_v up_o above_o the_o base_a of_o the_o vessel_n and_o the_o reason_n be_v because_o the_o strength_n of_o the_o pressure_n of_o water_n be_v always_o secundum_fw-la altitudinem_fw-la vel_fw-la profunditatem_fw-la and_o not_o at_o all_o secundum_fw-la latitudinem_fw-la vel_fw-la amplitudinem_fw-la and_o the_o water_n in_o 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a_o nisus_n downward_o but_o the_o water_n itself_o when_o i_o remove_v a_o vessel_n of_o it_o out_o of_o the_o river_n into_o a_o boat_n or_o upon_o the_o shore_n invade_v the_o place_n that_o the_o air_n before_o have_v and_o so_o can_v be_v the_o proper_a place_n of_o the_o water_n so_o that_o upon_o the_o whole_a account_n the_o water_n unless_o otherwise_o impede_v must_v necessary_o move_v downward_o in_o all_o position_n though_o sometime_o it_o have_v a_o accidental_a or_o consequential_a motion_n upward_o and_o by_o reason_n of_o its_o fluidity_n a_o lateral_a motion_n therefore_o i_o confess_v i_o be_o to_o seek_v what_o be_v mean_v when_o it_o be_v say_v that_o the_o nisus_n of_o water_n downward_o be_v occasional_a and_o pro_fw-la re_fw-la nata_fw-la as_o well_o as_o upward_o namely_o when_o it_o be_v out_o of_o its_o place_n remark_n xxii_o xxiii_o xxiv_o xxv_o xxvi_o xxvii_o xxviii_o i_o answer_v to_o the_o demand_v the_o mobility_n of_o the_o water_n downward_o be_v natural_a be_v thereunto_o as_o a_o heavy_a body_n determine_v by_o the_o principle_n thereof_o viz._n intrinsic_a gravity_n but_o the_o other_o motion_n be_v either_o from_o its_o fluidity_n or_o occasional_a though_o it_o be_v not_o pertinent_a to_o the_o debate_n yet_o it_o be_v plain_a that_o at_o the_o same_o time_n water_n may_v have_v a_o occasional_a motion_n upward_o or_o lateral_o and_o yet_o a_o natural_a motion_n downward_o the_o bucket_n of_o water_n weigh_v 12_o pound_n will_v weigh_v as_o much_o when_o a_o tube_n stop_v below_o and_o immerse_v and_o then_o open_v below_o give_v a_o occasional_a motion_n to_o part_v of_o the_o water_n upward_o into_o the_o tube_n and_o the_o same_o be_v apparent_a when_o it_o drive_v up_o a_o light_a rundle_n of_o wood_n
a_o explication_n as_o real_o and_o in_o truth_n consist_v not_o with_o it_o as_o we_o shall_v see_v hereafter_o this_o be_v therefore_o the_o state_n of_o the_o notion_n of_o rarefaction_n and_o condensation_n in_o its_o true_a explication_n we_o be_v to_o consider_v what_o body_n or_o motion_n in_o body_n be_v such_o as_o be_v applicable_a to_o the_o argument_n in_o hand_n the_o special_a instance_n that_o i_o shall_v use_v be_v these_o 1._o the_o rarefaction_n or_o condensation_n of_o body_n by_o transmutation_n thus_o water_n by_o rarefaction_n be_v sometime_o change_v into_o air_n which_o have_v thereby_o a_o great_a extension_n than_o it_o have_v before_o by_o about_o 900_o time_n and_o air_n by_o condensation_n be_v change_v into_o water_n and_o thereby_o lose_v by_o contraction_n a_o like_a proportion_n of_o space_n than_o it_o have_v before_o thus_o aristotle_n in_o 4._o phys_n cap._n 9_o and_o the_o great_a verulam_n in_o historia_n densi_fw-la &_o rari_fw-la pag._n 88_o 2._o the_o rarefaction_n that_o be_v cause_v by_o external_a violence_n as_o in_o the_o air-pump_n in_o the_o cacabus_fw-la evacuatorius_fw-la and_o the_o magdeburg_n engine_n this_o be_v a_o rarefaction_n by_o tension_n whereby_o the_o air_n be_v dilate_v not_o only_o in_o its_o external_a bulk_n but_o in_o all_o the_o part_n of_o it_o and_o in_o its_o internal_a as_o well_o as_o external_a part_n and_o dimension_n and_o thus_o mersennus_n and_o other_o tell_v we_o air_n may_v be_v dilate_v to_o near_o 70_o time_n its_o former_a and_o natural_a extent_n 3._o the_o condensation_n that_o be_v make_v by_o compression_n some_o there_o be_v that_o think_v water_n be_v thus_o contractible_a and_o condensible_a by_o compression_n the_o same_o verulam_n ubi_fw-la supra_fw-la pag._n 99_o tell_v we_o that_o take_v a_o leaden_a hollow_a globe_n and_o fill_v it_o with_o water_n and_o then_o strong_o stop_v the_o orifice_n which_o take_v in_o the_o water_n and_o compress_v the_o globe_n in_o a_o strong_a presser_z whereby_o it_o may_v be_v reduce_v to_o a_o eight_o part_n of_o its_o former_a dimension_n the_o water_n will_v sustain_v that_o contraction_n but_o if_o it_o be_v press_v far_o the_o water_n will_v discharge_v itself_o through_o the_o globe_n ad_fw-la modum_fw-la parvi_fw-la imbris_fw-la it_o be_v not_o impossible_a but_o it_o may_v do_v so_o from_o its_o first_o compression_n though_o the_o stream_n by_o reason_n of_o their_o exility_n be_v imperceptible_a to_o the_o eye_n as_o the_o emanation_n of_o effluvia_fw-la through_o the_o pore_n of_o the_o body_n of_o animal_n electrical_a efflux_n or_o the_o odour_n of_o herb_n for_o water_n though_o fluid_a seem_v very_o impatient_a of_o condensation_n by_o compression_n yet_o it_o be_v not_o impossible_a if_o under_o a_o very_a strong_a pressure_n but_o to_o the_o very_a eye_n it_o appear_v capable_a of_o dilatation_n by_o tension_n in_o its_o discharge_n of_o itself_o by_o bubble_n upon_o a_o strong_a tension_n but_o howsoever_o it_o be_v with_o water_n it_o be_v apparent_a that_o air_n be_v capable_a of_o condensation_n and_o contraction_n by_o compression_n this_o appear_v visible_o in_o the_o compression_n of_o the_o air_n by_o wind-gun_n and_o the_o careful_a injection_n of_o water_n by_o a_o well_o order_v syringe_n in_o a_o empty_a aeolipile_n so_o that_o air_n by_o these_o mean_n may_v be_v contract_v into_o a_o seven_o nay_o possible_o a_o seventi_v part_n of_o its_o natural_a space_n or_o dimension_n 4._o the_o rarefaction_n and_o consequential_a dilatation_n of_o body_n by_o heat_n or_o fire_n thus_o water_n itself_o be_v rarefy_v and_o extend_v into_o vapour_n by_o heat_n the_o lord_n verulam_n ubi_fw-la supra_fw-la pag._n 28._o give_v we_o a_o notable_a instance_n by_o take_v a_o vial-glass_n hold_v a_o ounce_n fill_v it_o half_o full_a of_o spirit_n of_o wine_n then_o take_v a_o empty_a bladder_n that_o hold_v about_o 8_o pint_n and_o tie_v it_o about_o the_o neck_n of_o the_o vial_n strict_o the_o spirit_n of_o wine_n heat_v upon_o the_o coal_n the_o aura_n spiritus_fw-la vini_n fill_v the_o bladder_n and_o yet_o only_o six_o penny_n weight_n of_o the_o spirit_n of_o wine_n spend_v which_o do_v not_o amount_v to_o the_o 40th_o part_n of_o a_o pint_n yet_o fill_v the_o bladder_n of_o 8_o pint_n with_o its_o rarefy_v air._n and_o although_o this_o instance_n be_v in_o the_o spirit_n of_o wine_n which_o be_v full_a of_o subtle_a matter_n than_o the_o like_a quantity_n of_o water_n yet_o it_o will_v hold_v its_o proportion_n with_o the_o fume_n or_o vapour_n of_o water_n and_o of_o the_o like_a kind_n be_v the_o rarefaction_n by_o ignition_n in_o the_o gunpowder_n where_o a_o grain_n of_o gunpowder_n fire_v will_v expand_v above_o a_o thousand_o time_n its_o former_a dimension_n and_o more_o but_o that_o which_o be_v most_o obvious_a to_o sense_n and_o most_o apposite_a to_o my_o purpose_n and_o therefore_o will_v be_v the_o subject_a of_o most_o of_o my_o ensue_a application_n be_v the_o rarefaction_n of_o air_n by_o heat_n whereby_o it_o may_v gain_v a_o expansion_n of_o above_o 70_o time_n its_o natural_a size_n and_o dimension_n as_o be_v easy_o find_v by_o the_o strong_a heat_n of_o a_o strong_a brass_n concave_a globe_n which_o if_o the_o include_v air_n have_v no_o vent_n will_v break_v it_o and_o if_o it_o have_v a_o vent_n and_o after_o it_o be_v strong_o heat_v cast_v into_o a_o vessel_n of_o water_n it_o will_v soon_o discover_v the_o proportion_n of_o its_o dilatation_n by_o the_o contraction_n that_o it_o receive_v from_o the_o cold_a water_n and_o by_o the_o quantity_n of_o water_n it_o suck_v in_o upon_o that_o contraction_n 5._o the_o condensation_n and_o consequential_a contraction_n that_o the_o air_n receive_v by_o the_o constipation_n of_o it_o by_o cold_a especial_o after_o a_o strong_a dilatation_n but_o although_o there_o be_v no_o such_o precede_a dilatation_n or_o expansion_n of_o the_o air_n by_o heat_n yet_o it_o be_v visible_a in_o weather-glass_n and_o other_o engine_n of_o that_o nature_n that_o the_o air_n be_v contract_v in_o its_o dimension_n by_o the_o ambient_fw-la cold_a from_o what_o it_o usual_o have_v at_o other_o time_n chap._n v._o concern_v the_o phaenomena_n of_o rarefaction_n and_o condensation_n apparent_a to_o sense_n to_o pursue_v all_o the_o phaenomena_n of_o condensation_n and_o rarefaction_n in_o its_o full_a latitude_n be_v too_o long_o a_o business_n and_o not_o so_o much_o conducible_a to_o my_o purpose_n i_o shall_v therefore_o take_v up_o those_o phaenomena_n that_o be_v apparent_o evident_a to_o sense_n in_o the_o rarefaction_n and_o condensation_n of_o air_n for_o the_o due_a discussion_n of_o that_o single_a subject_n will_v give_v a_o estimate_n and_o explication_n of_o other_o rarefaction_n and_o condensation_n 1._o it_o be_v evident_a to_o our_o very_a sense_n that_o a_o small_a portion_n of_o air_n suppose_v a_o cubique_a foot_n in_o a_o vessel_n be_v ratify_v by_o heat_n will_v take_v up_o a_o far_o great_a space_n than_o it_o do_v before_o such_o application_n and_o the_o like_a will_v be_v when_o it_o be_v do_v by_o tension_n as_o in_o the_o air-pump_n and_o the_o magdeburg-engin_n for_o when_o a_o great_a part_n of_o the_o air_n be_v drive_v out_o by_o heat_n in_o the_o one_o instance_n and_o draw_v out_o by_o traction_n in_o the_o other_o yet_o it_o be_v evident_a to_o sense_n that_o the_o receiver_n or_o other_o vessel_n remain_v full_a of_o a_o very_a rare_a and_o extend_a air_n for_o sensible_o no_o other_o substance_n supply_v it_o 2._o it_o be_v evident_a to_o sense_n that_o this_o distension_n of_o the_o air_n be_v not_o only_o in_o the_o extima_fw-la superficies_n but_o in_o all_o the_o very_a internal_a part_n of_o it_o for_o it_o be_v apparent_a to_o our_o sense_n that_o it_o have_v a_o visible_a effect_n as_o well_o upon_o the_o bird_n water_n or_o other_o body_n place_v in_o the_o middle_n of_o the_o cavity_n of_o the_o receiver_n as_o in_o those_o that_o be_v conterminous_a to_o the_o side_n of_o it_o as_o appear_v in_o those_o many_o instance_n give_v by_o mr._n b._n especial_o in_o 21_o 22_o etc._n etc._n experiment_n and_o unless_o the_o whole_a body_n be_v extend_v every_o where_o and_o every_o way_n it_o be_v impossible_a that_o a_o little_a portion_n of_o air_n include_v in_o a_o bladder_n shall_v increase_v its_o bulk_n by_o heat_n to_o ten_o time_n its_o extension_n as_o it_o will_v do_v and_o be_v apparent_a to_o our_o sight_n by_o the_o ample_a distension_n of_o the_o bladder_n 3._o it_o be_v apparent_a to_o our_o sense_n that_o if_o the_o air_n be_v rarify_v by_o heat_n in_o any_o close_a vessel_n as_o the_o heat_n which_o be_v the_o cause_n of_o its_o rarefaction_n decay_n so_o the_o air_n endeavour_v its_o contraction_n to_o gain_v its_o primitive_a size_n which_o it_o then_o attain_v when_o the_o heat_n be_v
that_o rarity_n and_o density_n be_v real_o natural_a affection_n or_o quality_n of_o physical_a body_n and_o that_o rarefaction_n be_v a_o real_a expansion_n of_o the_o very_a entire_a mole_n of_o the_o body_n true_o rarefy_v and_o condensation_n be_v a_o real_a contraction_n of_o the_o whole_a dimension_n of_o the_o body_n condense_v namely_o where_o it_o be_v true_o and_o formal_o a_o true_a rarefaction_n or_o condensation_n as_o the_o question_n be_v above_o state_v in_o the_o begin_n of_o the_o four_o chapter_n and_o this_o i_o call_v the_o aristotelian_a solution_n and_o seem_v to_o i_o the_o true_a in_o the_o manner_n hereafter_o dedescribe_v first_o therefore_o touch_v the_o first_o of_o these_o solution_n by_o interspersed_a vacuity_n this_o though_o it_o do_v in_o truth_n take_v away_o the_o true_a notion_n of_o rarefaction_n and_o condensation_n as_o it_o be_v before_o state_v for_o still_o the_o same_o body_n hold_v but_o the_o same_o quantity_n of_o space_n though_o in_o different_a position_n or_o ubication_n of_o its_o part_n yet_o i_o must_v needs_o say_v be_v the_o supposition_n of_o interspersed_a vacuity_n true_a will_v in_o a_o great_a measure_n though_o not_o altogether_o salve_v many_o of_o the_o phaenomena_n of_o rarefaction_n and_o condensation_n but_o there_o be_v these_o two_o grand_a objection_n that_o i_o think_v render_v this_o solution_n impossible_a to_o be_v true_a 1._o it_o seem_v to_o i_o utter_o untrue_a that_o there_o be_v any_o such_o interspersed_a vacuity_n whole_o destitute_a of_o body_n either_o in_o the_o air_n or_o any_o other_o body_n and_o herein_o the_o cartesian_o and_o i_o agree_v and_o that_o which_o render_v this_o supposition_n untrue_a be_v that_o excellent_a demonstration_n improve_v by_o sir_n k._n digby_n in_o his_o history_n of_o body_n if_o there_o be_v such_o interspersed_a vacuity_n it_o must_v necessary_o follow_v that_o those_o body_n of_o a_o equal_a superficies_n that_o be_v more_o rare_a must_v have_v more_o or_o great_a interspersion_n of_o such_o vacuity_n than_o such_o as_o be_v more_o dense_n or_o which_o be_v all_o one_o the_o same_o mole_n of_o body_n that_o be_v more_o dense_a must_v needs_o have_v more_o of_o matter_n or_o body_n in_o it_o than_o that_o which_o be_v more_o rare_a or_o which_o seem_v to_o be_v equal_o consequential_a that_o where_o the_o body_n be_v more_o weighty_a the_o same_o external_a mole_n of_o the_o more_o weighty_a body_n must_v needs_o have_v more_o of_o body_n and_o less_o of_o interspersed_a vacuity_n than_o that_o which_o be_v more_o light_a where_o the_o external_a mole_n of_o either_o be_v equal_a and_o therefore_o a_o cubique_a foot_n of_o gold_n must_v have_v more_o of_o body_n and_o less_o of_o interspersed_a vacuity_n than_o the_o like_a cubique_a foot_n of_o silver_n and_o that_o than_o the_o like_a cubique_a foot_n of_o water_n and_o that_o than_o the_o like_a cubique_a foot_n of_o air._n the_o lord_n verulam_n in_o his_o historia_fw-la densi_fw-la &_o rari_fw-la pag._n 8_o &_o 9_o by_o a_o exact_a computation_n give_v we_o the_o estimate_n of_o the_o disproportion_n of_o weight_n of_o the_o same_o extrinsic_a mole_n of_o several_a body_n whereby_o he_o find_v that_o a_o portion_n of_o pure_a gold_n reduce_v into_o a_o cubical_a figure_n or_o mole_n weigh_v 20_o d_o weight_n and_o the_o like_a mole_n of_o of_o mercury_n 19_o d_o weight_n and_o 9_o grain_n the_o like_a mole_n of_o silver_n weigh_v 10_o d_o weight_n and_o 21_o grain_n and_o the_o like_a mole_n of_o water_n weigh_v 1_o d_o weight_n and_o 3_o grain_n and_o upon_o a_o like_a trial_n pag._n 20._o find_v that_o the_o heavy_a any_o solid_a body_n be_v and_o more_o unite_a its_o part_n be_v the_o light_a be_v the_o same_o body_n reduce_v into_o dust_n though_o close_o compress_v together_o in_o comparison_n to_o the_o weight_n of_o the_o same_o body_n before_o its_o pulverization_n his_o experiment_n go_v not_o so_o far_o as_o the_o disproportion_n between_o the_o weight_n or_o denseness_n of_o air_n or_o water_n but_o mersennus_n and_o some_o other_o that_o have_v be_v curious_a in_o this_o computation_n tell_v we_o that_o the_o same_o extrinsic_a mole_n of_o water_n be_v about_o 14_o time_n light_a than_o the_o like_a mole_n of_o mercury_n and_o the_o same_o mole_n of_o air_n be_v at_o least_o 900_o time_n other_o say_v 1300_o time_n light_a than_o the_o like_a mole_n of_o water_n the_o consequence_n whereof_o be_v that_o if_o we_o shall_v suppose_v a_o cubick_a inch_n or_o foot_n of_o mercury_n to_o be_v entire_o full_a without_o interspersed_a vacuity_n or_o other_o matter_n in_o it_o which_o yet_o upon_o the_o account_n give_v want_v much_o it_o must_v follow_v that_o in_o one_o cubique_fw-la inch_n or_o foot_n or_o other_o mole_n of_o air_n for_o one_o particle_n of_o body_n there_o must_v be_v 11699_o part_n of_o empty_a space_n each_o of_o these_o space_n equal_a to_o the_o space_n that_o the_o real_a body_n of_o the_o air_n take_v up_o such_o be_v the_o disproportion_n of_o the_o weight_n between_o the_o like_a quantity_n or_o mole_n of_o air_n to_o that_o of_o like_a mole_n of_o mercury_n viz._n as_o 1_o to_o 11700._o the_o consequence_n whereof_o will_v be_v that_o yet_o the_o cubique_a foot_n or_o inch_n or_o other_o measure_n or_o a_o vessel_n contain_v nothing_o but_o air_n may_v receive_v a_o quantity_n of_o mercury_n that_o bear_v proportion_n as_o 11699_o to_o 1_o and_o a_o quantity_n of_o water_n as_o bear_v the_o proportion_n of_o 899_o to_o 1_o without_o extrude_a any_o part_n of_o the_o include_v air_n or_o overfil_v or_o break_v the_o vessel_n wherein_o it_o be_v include_v and_o if_o we_o shall_v suppose_v that_o in_o the_o common_a air_n we_o breath_n in_o there_o shall_v be_v but_o 891_o part_n of_o vacuity_n for_o one_o part_n of_o true_a substantial_a air_n as_o there_o must_v be_v upon_o this_o supposition_n all_o respiration_n will_v present_o be_v obstruct_v and_o indeed_o all_o that_o motion_n which_o we_o see_v especial_o in_o meteor_n but_o as_o this_o be_v prodigious_o incredible_a so_o it_o be_v apparent_o untrue_a for_o take_v a_o tube_n full_a of_o air_n and_o stop_v it_o at_o one_o end_n immerse_v the_o open_a end_n into_o water_n and_o press_v it_o down_o as_o low_a as_o may_v be_v yet_o not_o one_o half_a of_o the_o tube_n will_v be_v fill_v with_o water_n nay_o take_v a_o aeolipile_n of_o brass_n with_o a_o syringe_n to_o drive_v in_o the_o water_n it_o will_v with_o great_a difficulty_n receive_v into_o it_o ¾_n part_n of_o water_n and_o thereby_o the_o air_n contract_v into_o a_o quarter_n of_o its_o former_a room_n and_o with_o great_a pain_n and_o force_n it_o may_v be_v into_o a_o much_o less_o room_n but_o never_o any_o pretend_v it_o can_v be_v compress_v into_o the_o 899_o the_o part_n of_o its_o former_a room_n and_o yet_o thus_o it_o may_v be_v and_o with_o great_a ease_n because_o here_o be_v 899_o empty_a space_n which_o may_v receive_v the_o water_n with_o as_o much_o ease_n as_o if_o the_o bottle_n or_o vessel_n be_v not_o empty_a only_o of_o water_n or_o air_n but_o perfect_o empty_a of_o any_o other_o body_n abate_v only_o 1_o 900_o of_o the_o room_n to_o receive_v the_o air._n 2._o the_o second_o difficulty_n in_o this_o supposition_n seem_v to_o be_v this_o that_o it_o do_v not_o answer_v the_o phaenomena_n especial_o in_o condensation_n of_o air_n by_o pressure_n as_o in_o wind-gun_n and_o aeolipile_n which_o visible_o with_o a_o great_a force_n endeavour_v its_o restitution_n as_o appear_v in_o the_o explosion_n of_o the_o air_n in_o wind-gun_n and_o ejection_n of_o water_n press_v into_o aeolipile_n for_o the_o air_n upon_o this_o supposition_n have_v a_o free_a room_n far_o more_o than_o sufficient_a for_o its_o reception_n and_o therefore_o have_v no_o need_n of_o any_o such_o violence_n in_o its_o motion_n of_o restitution_n it_o have_v 899_o empty_a cavity_n whereas_o it_o have_v need_v but_o of_o 1_o 900_o part_n thereof_o for_o its_o reception_n and_o more_o vacuity_n can_v contribute_v nothing_o either_o to_o resist_v compression_n or_o to_o cause_v a_o sensible_a force_n of_o restitution_n because_o nothing_o can_v have_v no_o activity_n or_o motion_n 3._o again_o if_o air_n or_o water_n be_v strong_o rarefy_v by_o heat_n we_o see_v it_o take_v up_o a_o large_a extension_n than_o before_o it_o have_v and_o that_o with_o such_o a_o energy_n and_o force_n that_o it_o will_v break_v a_o strong_a vessel_n enclose_v it_o which_o it_o can_v never_o do_v be_v there_o any_o considerable_a interspersion_n of_o vacuity_n because_o the_o body_n of_o the_o air_n will_v with_o much_o more_o ease_n break_v into_o those_o vacua_fw-la interstitia_fw-la which_o have_v no_o resistance_n against_o it_o than_o it_o will_v or_o can_v force_v its_o room_n upon_o
that_o ship_n and_o other_o vessel_n be_v bear_v up_o by_o the_o water_n although_o they_o be_v often_o ladâ—â—_n with_o great_a ordnance_n bullet_n and_o other_o thing_n intrinsical_o heavy_a than_o the_o like_a quantity_n of_o water_n yet_o in_o as_o much_o as_o the_o whole_a ship_n or_o vessel_n have_v a_o great_a cavity_n and_o take_v up_o room_n in_o the_o sea_n proportionable_a to_o that_o structure_n and_o a_o mole_n of_o water_n commensurate_n to_o the_o hull_n of_o the_o ship_n as_o it_o have_v that_o concave_a posture_n be_v of_o much_o great_a extrinsic_a weight_n than_o the_o vessel_n therefore_o it_o be_v bear_v up_o and_o sustain_v by_o it_o and_o thus_o a_o body_n intrinsical_o heavy_a than_o a_o fluid_a wherein_o it_o be_v immerse_v may_v be_v extrinsecal_o light_a 1._o in_o respect_n of_o its_o concretion_n or_o composition_n 2._o in_o respect_n of_o its_o structure_n and_o cavity_n which_o give_v a_o great_a amplitude_n to_o it_o that_o body_n be_v say_v to_o be_v both_o extrinsecally_a and_o intrinsical_o heavy_a when_o it_o exceed_v another_o body_n in_o both_o respect_n as_o a_o ingott_n of_o gold_n that_o weigh_v two_o pound_n be_v both_o extrinsecally_a and_o intrinsical_o heavy_a than_o a_o ingot_n of_o silver_n weigh_v only_o one_o pound_n and_o thus_o far_o concern_v weight_n extrinsic_a and_o intrinsic_a second_o the_o second_o thing_n which_o i_o intend_v be_v to_o declare_v the_o various_a habitude_n of_o heavy_a or_o light_a body_n with_o relation_n to_o the_o fluid_n in_o which_o they_o be_v immerse_v whereby_o possible_o much_o of_o the_o learning_n and_o experience_n de_fw-fr insidentibus_fw-la humido_fw-la may_v be_v explicate_v namely_o 1._o where_o a_o body_n specifical_o or_o intrinsical_o heavy_a be_v immerse_v in_o a_o fluid_fw-la intrinsical_o light_a than_o itself_o as_o gold_n lead_v or_o iron_n in_o water_n 2._o where_o a_o body_n be_v immerse_v into_o a_o fluid_a of_o equal_a weight_n with_o itself_o which_o though_o it_o may_v be_v difficult_a to_o attain_v yet_o attainable_a it_o be_v as_o shall_v be_v show_v 3._o when_o a_o body_n specifical_o or_o intrinsical_o light_a be_v immerse_v into_o a_o fluid_a and_o intrinsical_o heavy_a than_o itself_o as_o a_o globe_n or_o cube_n of_o fir_n or_o elm_n into_o water_n which_o be_v much_o heavy_a intrinsical_o than_o such_o light_a wood_n 4._o when_o a_o body_n intrinsical_o light_a yâ—â—_n extrinsecal_o heavy_a than_o that_o portion_n of_o fluid_a wherein_o it_o be_v immerse_v be_v equal_a in_o weight_n to_o it_o as_o where_o a_o globe_n or_o cube_n of_o fir_n or_o elm_n weigh_v six_o pound_n be_v immerse_v into_o a_o vessel_n of_o water_n contain_v just_o six_o pound_n weight_n of_o water_n or_o any_o quantity_n less_o than_o it_o therefore_o 1._o if_o a_o dense_a body_n be_v immerse_v in_o a_o fluid_fw-la intrinsical_o light_a than_o it_o that_o dense_a body_n will_v subside_o to_o the_o bottom_n though_o the_o fluid_a body_n in_o extrinsical_a weight_n be_v more_o than_o forty_o time_n of_o great_a extent_n than_o such_o a_o dense_a body_n as_o if_o a_o cube_n or_o globe_n of_o lead_n or_o mercury_n though_o but_o of_o a_o inch_n diameter_n be_v cast_v into_o the_o deep_a ocean_n for_o the_o reason_n before_o give_v where_o i_o treat_v of_o the_o difference_n between_o extrinsic_a and_o intrinsic_a disparity_n of_o gravity_n only_o it_o have_v those_o exception_n before_o give_v touch_v the_o mixture_n of_o such_o heavy_a body_n with_o a_o light_a and_o the_o configuration_n of_o such_o dense_a body_n into_o cavity_n or_o hollowness_n for_o the_o reason_n there_o give_v which_o i_o need_v not_o repeat_v 2._o if_o a_o dense_a body_n be_v immerse_v into_o a_o fluid_a of_o a_o equal_a intrinsic_a weight_n with_o such_o dense_a body_n it_o be_v general_o think_v that_o such_o dense_a body_n will_v keep_v any_o position_n that_o it_o be_v put_v into_o if_o place_v near_o the_o top_n or_o in_o the_o middle_n or_o near_o the_o balance_n of_o the_o vessel_n contain_v the_o fluid_a though_o i_o have_v for_o the_o most_o part_n observe_v it_o to_o rise_v towards_o the_o superficies_n of_o the_o fluid_a and_o hold_v its_o upper_a superficies_n equal_a to_o it_o as_o suppose_v a_o cube_n of_o water_n six_o inch_n square_v weigh_v 14_o pound_n a_o like_a cubique_fw-la piece_n of_o wood_n of_o the_o same_o dimension_n and_o weight_n will_v stand_v at_o all_o position_n in_o a_o vessel_n of_o 7_o or_o 8_o gallon_n of_o water_n for_o such_o a_o dense_a body_n be_v as_o so_o much_o water_n in_o this_o respect_n they_o be_v of_o equal_a bulk_n and_o equal_a intrinsic_a weight_n but_o it_o be_v a_o very_a difficult_a matter_n to_o find_v just_a such_o a_o equality_n between_o solid_n and_o fluid_n be_v of_o such_o different_a texture_n the_o best_a expedient_a be_v by_o a_o hollow_a vial-glass_n reduce_v to_o such_o a_o equipondium_fw-la by_o immission_n of_o small_a leaden_a shot_n into_o it_o till_o the_o glass_n and_o shot_n arise_v to_o the_o just_a equipondium_fw-la of_o a_o bulk_n of_o water_n equal_a to_o the_o whole_a superficies_n of_o the_o glass_n 3._o when_o a_o body_n intrinsical_o light_a than_o a_o fluid_a be_v immerse_v in_o such_o fluid_fw-la part_n of_o that_o light_a body_n will_v rise_v above_o the_o superficies_n of_o the_o water_n or_o other_o fluid_a into_o which_o it_o be_v immerse_v and_o will_v leave_v so_o much_o of_o itself_o under_o the_o superficies_n of_o the_o water_n as_o be_v equal_a to_o a_o body_n or_o bulk_n of_o water_n full_o commensurate_a to_o the_o whole_a weight_n of_o such_o immersed_a body_n for_o instance_n suppose_v a_o globe_n of_o light_a wood_n of_o six_o inch_n diameter_n weigh_v 5_o pound_n and_o a_o globular_a portion_n of_o water_n of_o the_o like_a diameter_n weigh_v 10_o pound_n this_o globe_n of_o wood_n immerse_v in_o a_o large_a vessel_n of_o water_n will_v rise_v so_o that_o one_o half_a thereof_o will_v be_v above_o the_o superficies_n of_o the_o water_n and_o the_o other_o half_o will_v be_v below_o the_o superficies_n of_o the_o water_n for_o the_o intrinsic_a weight_n of_o the_o water_n be_v double_a to_o the_o intrinsic_a weight_n of_o the_o wood_n so_o that_o a_o portion_n of_o water_n equal_a to_o half_a the_o globe_n of_o wood_n weigh_v as_o much_o as_o the_o whole_a globe_n of_o wood_n and_o the_o like_a proportion_n will_v hold_v where_o the_o globe_n of_o wood_n be_v light_a than_o the_o like_a portion_n of_o water_n by_o one_o three_o or_o one_o four_o or_o one_o six_o part_n mutatis_fw-la mutandis_fw-la 4._o if_o a_o gross_a body_n suppose_v of_o wood_n specifical_o light_a than_o the_o like_a quantity_n of_o water_n be_v immerse_v into_o a_o quantity_n of_o water_n extrinsecal_o light_a than_o that_o immersed_a body_n that_o body_n though_o specifical_o and_o intrinsical_o light_a will_v not_o rise_v from_o the_o bottom_n of_o the_o vessel_n but_o will_v sink_v down_o to_o the_o base_a or_o bottom_n of_o the_o vessel_n and_o remain_v contiguous_a to_o it_o notwithstanding_o the_o intrinsical_a overweight_n of_o the_o water_n to_o the_o immersed_a body_n as_o if_o in_o the_o former_a instance_n a_o globe_n of_o wood_n of_o 6_o inch_n diameter_n and_o 5_o pound_n weight_n be_v light_a by_o half_a intrinsical_o than_o the_o like_a portion_n of_o water_n if_o this_o globe_n of_o wood_n be_v immerse_v into_o a_o cylindrous_a vessel_n of_o 7_o or_o 8_o inch_n diameter_n contain_v 4_o pound_n weight_n nay_o 5_o pound_n weight_n of_o water_n the_o globe_n of_o wood_n shall_v not_o swim_v nor_o rise_v from_o the_o base_a of_o the_o vessel_n and_o the_o reason_n be_v apparent_a because_o though_o in_o intrinsic_a weight_n the_o water_n be_v double_a to_o that_o wood_n yet_o in_o extrinsic_a weight_n the_o globe_n of_o wood_n in_o one_o instance_n exceed_v in_o the_o other_o instance_n equal_v the_o extrinsic_a weight_n of_o the_o water_n and_o so_o the_o intrinsic_a weight_n of_o the_o water_n be_v over-matched_n by_o the_o extrinsic_a weight_n of_o the_o wood_n and_o therefore_o can_v preponderate_v it_o nor_o consequent_o drive_v it_o up_o as_o in_o a_o pair_n of_o scale_n if_o there_o be_v two_o pound_n of_o feather_n in_o one_o scale_n and_o but_o a_o pound_n of_o lead_n in_o the_o other_o the_o pound_n of_o lead_n though_o intrinsical_o heavy_a than_o the_o feather_n will_v not_o raise_v the_o scale_n of_o the_o feather_n but_o will_v be_v raise_v up_o by_o they_o and_o if_o in_o one_o scale_n there_o be_v two_o pound_n of_o feather_n and_o in_o the_o other_o two_o pound_n of_o lead_n neither_o scale_n will_v be_v raise_v by_o the_o other_o but_o stand_v in_o a_o state_n of_o rest_n because_o in_o aequilibrio_fw-la 5._o if_o a_o cube_n or_o globe_n of_o wood_n of_o six_o inch_n diameter_n and_o weigh_v six_o pound_n be_v but_o half_a
blood_n humour_n chyle_n and_o latex_n may_v one_o correct_v the_o other_o and_o the_o same_o i_o say_v of_o water_n though_o there_o be_v particular_a motion_n of_o its_o part_n as_o a_o fluid_a body_n and_o those_o correct_v and_o refract_v one_o another_o yet_o the_o motion_n of_o the_o entire_a mole_n corporea_fw-la as_o constitute_v one_o entire_a body_n retain_v its_o entire_a weight_n upon_o the_o scale_n viz._n 12_o pound_n and_o this_o without_o any_o repugnancy_n to_o or_o diminution_n of_o the_o law_n of_o nature_n in_o relation_n to_o the_o descent_n of_o heavy_a body_n to_o the_o centre_n take_v a_o balance_n and_o charge_v one_o scale_n with_o 3_o pound_n weight_n the_o other_o with_o 2_o pound_n weight_n the_o preponderation_n of_o the_o scale_n with_o 3_o pound_n weight_n will_v raise_v up_o the_o scale_n with_o 2_o pound_n weight_n so_o that_o in_o a_o relative_a consideration_n between_o the_o weight_n the_o latter_a have_v no_o sensible_a gravitation_n and_o yet_o the_o hand_n that_o hold_v the_o balance_n will_v sustain_v and_o feel_v in_o both_o scale_n together_o the_o weight_n of_o 5_o pound_n and_o it_o be_v a_o unreasonable_a way_n of_o argumentation_n to_o urge_v that_o because_o the_o light_a weight_n have_v lose_v its_o actual_a gravitation_n in_o relation_n to_o the_o heavy_a weight_n therefore_o the_o weight_n of_o both_o shall_v be_v but_o 3_o pound_n which_o be_v the_o preponderate_a weight_n of_o the_o heavy_a scale_n 1._o that_o notwithstanding_o this_o aequipondium_fw-la in_o this_o instance_n between_o the_o 2_o pound_n and_o 4_o pound_n whereby_o the_o relative_a weight_n of_o each_o be_v abate_v yet_o the_o entire_a engine_n with_o its_o weight_n will_v weigh_v 6_o pound_n beside_o the_o weight_n of_o the_o engin._n 2._o that_o by_o the_o declivity_n of_o the_o motion_n of_o d_o it_o lose_v half_a of_o that_o weight_n that_o it_o will_v have_v in_o a_o direct_a descent_n from_o c_o to_o b_o and_o so_o this_o accidental_a interposition_n of_o a_o motion_n per_fw-la declive_a correct_v that_o natural_a gravitation_n that_o be_v true_o central_a and_o perpendicular_a 3._o but_o yet_o it_o do_v not_o whole_o remove_v or_o take_v it_o away_o only_o the_o declive_a termination_n or_o direction_n take_v off_o one_o half_a of_o the_o actual_a perpendicular_a or_o central_a gravitation_n and_o this_o instance_n explicate_v and_o in_o a_o great_a measure_n prove_v what_o i_o have_v say_v and_o evince_v that_o these_o 29_o 30_o remark_n be_v not_o of_o that_o moment_n as_o the_o remarker_n take_v they_o to_o be_v so_o that_o upon_o the_o whole_a matter_n though_o a_o tun_n of_o water_n in_o a_o vessel_n weigh_v 2000_o pound_n weight_n and_o that_o a_o man_n be_v lay_v upon_o his_o back_n in_o the_o bottom_n of_o that_o vessel_n be_v subject_v to_o a_o pile_n or_o column_n of_o water_n equal_a in_o base_a to_o the_o half_a of_o that_o tun_n of_o water_n yet_o the_o man_n shall_v not_o be_v press_v with_o 1000_o pound_n weight_n of_o water_n nor_o the_o 1000_o the_o part_n thereof_o and_o yet_o the_o whole_a vessel_n of_o water_n or_o the_o whole_a water_n in_o the_o vessel_n shall_v nevertheless_o weigh_v 2000_o pound_n upon_o the_o reason_n give_v in_o the_o 7_o the_o and_o 8_o the_o chapter_n of_o the_o essay_n without_o the_o help_n of_o a_o hylarchical_a spirit_n whether_o intelligent_a sentient_a or_o plastic_a only_o and_o thus_o i_o have_v do_v with_o the_o remark_n upon_o the_o pamphlet_n call_v a_o essay_n touch_v the_o gravitation_n of_o fluids_n the_o brief_a of_o what_o i_o have_v herein_o and_o there_o deliver_v be_v as_o follow_v i._o that_o there_o seem_v to_o i_o a_o double_a reason_n of_o the_o non-gravitation_a of_o fluid_n upon_o body_n within_o they_o of_o a_o narrow_a base_n at_o least_o than_o the_o base_a of_o the_o whole_a mole_n of_o the_o water_n incumbent_a upon_o they_o namely_o 1._o mechanical_a which_o be_v principal_o sustinendo_fw-la the_o inferior_a part_n of_o the_o water_n sustain_v and_o bear_v up_o the_o superior_a as_o analogical_a to_o the_o sustentation_n of_o the_o superior_a part_n of_o sand_n or_o other_o minute_n body_n by_o the_o inferior_a 2._o natural_a premendo_fw-la which_o be_v the_o motion_n of_o the_o part_n of_o water_n itself_o as_o a_o fluid_a though_o withal_o a_o heavy_a body_n which_o be_v per_fw-la declive_a and_o very_o near_o horizontal_a correct_v the_o central_a gravitation_n ii_o that_o although_o the_o mole_n of_o water_n consider_v as_o one_o common_a mass_n or_o moles_n move_v as_o a_o heavy_a body_n in_o a_o central_a termination_n yet_o the_o water_n and_o its_o part_n consider_v in_o their_o fluid_a consistency_n have_v differ_v motion_n as_o a_o fluid_a body_n and_o with_o various_a termination_n viz._n central_a lateral_a and_o per_fw-la declive_a which_o check_n and_o refract_v the_o pressure_n of_o each_o other_o so_o that_o the_o entire_a pressure_n of_o the_o part_n of_o water_n be_v not_o all_o one_o way_n because_o a_o fluid_a body_n though_o as_o one_o entire_a mole_n it_o press_v with_o one_o single_a central_a termination_n as_o a_o heavy_a body_n yet_o the_o part_n thereof_o in_o their_o common_a consistency_n have_v various_a motion_n or_o conatus_fw-la ad_fw-la motum_fw-la iii_o that_o although_o the_o various_a conatus_fw-la ad_fw-la motum_fw-la of_o the_o part_n of_o water_n in_o fluore_n do_v correct_v the_o motion_n of_o water_n in_o relation_n to_o their_o termination_n as_o a_o fluid_a body_n whereby_o divers_a urinatores_fw-la be_v not_o press_v to_o death_n yet_o these_o motion_n of_o its_o part_n as_o a_o fluid_a body_n do_v not_o abate_v or_o alter_v the_o common_a motion_n of_o the_o whole_a mole_n when_o in_o one_o collection_n in_o its_o central_a termination_n as_o a_o heavy_a body_n iv._o that_o beside_o these_o motion_n incident_a to_o water_n as_o a_o heavy_a or_o a_o fluid_a body_n there_o be_v or_o may_v be_v certain_a accidental_a motion_n ab_fw-la extrinseco_fw-la which_o may_v give_v water_n a_o vertical_a ascend_a motion_n of_o pressure_n by_o a_o external_a force_n as_o that_o motion_n which_o arise_v by_o circumpulsion_n where_o it_o meet_v with_o a_o light_a body_n below_o the_o superficies_n as_o in_o that_o of_o the_o rundle_n of_o a_o light_a body_n as_o a_o rundle_n of_o wood_n the_o rise_n up_o of_o water_n into_o a_o tube_n full_a of_o air_n the_o instance_n of_o the_o value_n give_v in_o the_o ensue_a remark_n all_o which_o though_o they_o partly_o happen_v from_o the_o fluidity_n of_o water_n yet_o they_o be_v effect_v from_o a_o accidental_a interposition_n and_o most_o ordinary_o be_v consequential_a upon_o a_o descent_n of_o the_o water_n first_o all_o which_o motion_n of_o part_n of_o fluid_n arise_v either_o ab_fw-la extrinseco_fw-la or_o from_o its_o fluidity_n yet_o be_v consistent_a with_o its_o intrinsical_a quality_n of_o a_o heavy_a body_n and_o the_o motion_n or_o conatus_fw-la ad_fw-la motum_fw-la of_o the_o entire_a mole_n thereof_o in_o a_o central_a termination_n or_o motion_n towards_o the_o centre_n which_o i_o usual_o express_v by_o a_o central_a motion_n or_o termination_n touch_v the_o remark_n upon_o difficiles_fw-la nugae_fw-la remark_n i._n i_o now_o come_v to_o the_o second_o course_n of_o remark_n upon_o difficiles_fw-la nugae_fw-la and_o begin_v with_o the_o first_o in_o this_o remark_n the_o learned_a author_n have_v fall_v upon_o one_o of_o the_o subtle_a subject_n in_o philosophy_n and_o such_o as_o will_v require_v more_o than_o a_o small_a treatise_n to_o give_v a_o tolerable_a account_n touch_v it_o namely_o rarefaction_n and_o condensation_n i_o have_v more_o large_o give_v a_o account_n of_o my_o thought_n touch_v it_o in_o the_o begin_n of_o this_o book_n whereby_o it_o will_v appear_v whether_o the_o principle_n i_o take_v up_o be_v unprove_v or_o whether_o they_o or_o the_o remarker_n principle_n be_v or_o can_v be_v prove_v by_o any_o experiment_n or_o reason_n in_o nature_n or_o whether_o his_o principle_n or_o i_o be_v such_o as_o be_v repugnant_a to_o reason_n and_o absurd_a if_o we_o close_o canvas_v they_o and_o more_o considerate_o search_v into_o they_o it_o be_v not_o in_o that_o place_n here_o remark_v upon_o necessary_a to_o prove_v they_o but_o to_o suppose_v they_o the_o proof_n be_v therefore_o there_o omit_v i_o have_v therefore_o now_o in_o the_o beginning_n supply_v that_o defect_n in_o some_o measure_n remark_n ii_o the_o learned_a remarker_n mistake_v the_o scope_n of_o the_o assertion_n it_o be_v true_a that_o the_o conjunction_n of_o solid_a heavy_a body_n contribute_v to_o their_o weight_n and_o consequent_o to_o the_o motion_n of_o the_o whole_a solid_a body_n downward_o but_o the_o actual_a gravitation_n of_o one_o part_n upon_o another_o be_v suspend_v by_o their_o continuity_n the_o low_a part_n receive_v and_o sustain_v and_o so_o de_fw-fr facto_fw-la suspend_v the_o actual_a
beside_o notion_n or_o imagination_n but_o the_o method_n of_o the_o effect_v it_o by_o this_o hylostatical_a spirit_n be_v more_o admirable_a though_o it_o be_v pleasant_o offer_v that_o thereby_o all_o go_v off_o glib_o and_o it_o be_v to_o this_o effect_n as_o i_o take_v it_o the_o hylostatical_a spirit_n find_v the_o subtlety_n of_o matter_n imprison_v in_o a_o undue_a place_n between_o the_o hemisphere_n present_o make_v up_o a_o occasional_a gravitation_n or_o elasticity_n in_o the_o ambient_fw-la air_n to_o squeeze_v out_o the_o include_v subtle_a matter_n and_o give_v it_o liberty_n and_o thereby_o press_v the_o hemisphere_n together_o and_o so_o in_o this_o glib_a hypothesis_n the_o remark_n do_v two_o thing_n viz._n 1._o it_o create_v a_o weight_n or_o elasticity_n in_o the_o ambient_fw-la air_n pro_fw-la re_fw-la nata_fw-la which_o as_o it_o be_v in_o effect_n contrary_a to_o all_o that_o he_o have_v before_o deliver_v against_o the_o weight_n or_o elasticity_n of_o the_o air_n so_o it_o have_v this_o disadvantage_n as_o be_v propose_v by_o the_o remark_n that_o it_o be_v infinite_o more_o incredible_a than_o the_o common_a supposition_n of_o the_o elaterist_n and_o indeed_o little_o less_o than_o miraculous_a and_o 2._o it_o be_v a_o conatus_fw-la of_o this_o hylostatical_a spirit_n to_o no_o purpose_n at_o all_o and_o mere_o frustraneous_a unless_o by_o such_o a_o admirable_a condensation_n of_o the_o ambient_fw-la air_n it_o can_v break_v the_o brazen_a rib_n whereas_o indeed_o it_o make_v the_o prison_n the_o strong_a i_o must_v confess_v this_o fetch_v go_v not_o down_o so_o easy_o with_o i_o nor_o i_o believe_v with_o many_o more_o remark_n xli_o i_o come_v to_o the_o remark_n upon_o the_o phaenomena_n of_o the_o glass-pump_n wherein_o i_o attribute_v the_o raise_n of_o the_o water_n in_o the_o glass_n to_o the_o traction_n make_v by_o the_o tensed_a air_n in_o the_o shank_n of_o the_o pump_n and_o the_o dilatation_n of_o the_o air_n in_o the_o top_n of_o the_o glass_n by_o the_o extraction_n of_o the_o water_n and_o the_o reason_n why_o after_o iterate_a evacuation_n of_o the_o water_n by_o that_o suction_n or_o traction_n no_o more_o will_v rise_v to_o be_v because_o the_o air_n in_o the_o bottle_n have_v undergo_v as_o great_a a_o tension_n or_o dilatation_n as_o a_o pump_n of_o that_o length_n can_v give_v it_o these_o thing_n i_o must_v observe_v touch_v this_o pump_n 1._o the_o length_n of_o the_o shank_n or_o pump_n if_o self_n above_o the_o glass_n be_v not_o much_o above_o fourteen_o inch_n and_o the_o embolus_fw-la proportionable_a thereunto_o if_o it_o have_v be_v long_o the_o attractive_a force_n must_v have_v be_v great_a and_o will_v probable_o have_v give_v a_o strong_a traction_n and_o consequent_o a_o great_a expansion_n tension_n or_o rarefaction_n to_o the_o air_n in_o the_o upper_a part_n of_o the_o glass_n 2._o that_o in_o this_o instance_n here_o be_v no_o misplace_n of_o the_o air_n or_o water_n upon_o which_o the_o author_n build_v much_o of_o the_o activity_n of_o his_o hylarchical_a principle_n in_o divers_a of_o his_o remark_n for_o the_o air_n in_o the_o bottle_n and_o in_o the_o shank_n of_o the_o pump_n be_v both_o above_o the_o situation_n of_o the_o water_n in_o the_o bottle_n and_o here_o the_o author_n after_o some_o recourse_n to_o the_o impossibility_n of_o penetration_n of_o dimension_n which_o he_o so_o often_o inculcate_n give_v we_o his_o solution_n return_v to_o the_o activity_n of_o the_o hylostatical_a principle_n which_o because_o the_o subtle_a matter_n misplace_v invigorate_v the_o external_a air_n to_o do_v something_o in_o this_o business_n but_o tell_v we_o not_o express_o what_o or_o how_o in_o this_o place_n we_o shall_v hereafter_o it_o may_v be_v find_v what_o be_v mean_v only_o he_o tell_v we_o two_o thing_n 1._o that_o it_o be_v impossible_a so_o heavy_a a_o body_n as_o water_n shall_v rise_v so_o high_a into_o so_o extreme_a a_o thin_a body_n in_o the_o glass_n and_o that_o without_o fresh_a air_n succeed_v 2._o that_o the_o embolus_fw-la that_o at_o the_o first_o pump_v overcome_v the_o consistence_n of_o the_o air_n shall_v as_o reasonable_o overcome_v it_o still_o as_o to_o the_o first_o it_o seem_v he_o be_v now_o please_v to_o admit_v a_o intrinsic_a gravity_n in_o the_o water_n which_o render_v it_o unwilling_a to_o ascend_v but_o beside_o according_a to_o the_o author_n assertion_n in_o his_o remark_n the_o more_o subtle_a part_n of_o the_o air_n will_v pervade_v the_o glass_n if_o that_o be_v true_a there_o will_v be_v supplemental_a subtle_a air_n at_o least_o to_o supply_v the_o evacuation_n of_o the_o water_n to_o the_o last_o drop_n as_o to_o the_o second_o there_o be_v nothing_o more_o plain_a to_o our_o very_a sense_n than_o that_o any_o extendible_a or_o tensible_a body_n till_o it_o be_v break_v do_v more_o easy_o yield_v to_o the_o first_o attempt_n of_o its_o extension_n which_o yet_o with_o more_o difficulty_n succeed_v afterward_o as_o be_v evident_a in_o the_o air-pump_n and_o a_o lutestring_n which_o be_v a_o instance_n i_o frequent_o use_v i_o confess_v but_o it_o explain_v my_o meaning_n so_o that_o this_o remark_n conclude_v nothing_o against_o what_o i_o have_v deliver_v in_o relation_n to_o my_o glass-pump_n nor_o to_o evidence_n the_o interposition_n therein_o of_o the_o suppose_a hylarchical_a principle_n remark_n xliii_o xliv_o xlv_o xlvi_o before_o i_o come_v to_o my_o observation_n upon_o these_o remark_n it_o may_v be_v convenient_a to_o give_v a_o explication_n of_o the_o dimension_n of_o the_o glass-pump_n that_o i_o make_v use_v of_o refer_v myself_o to_o the_o figure_n thereof_o describe_v in_o the_o nugae_fw-la fig._n 21._o the_o whole_a length_n from_o the_o upper_a end_n of_o the_o embolus_fw-la to_o the_o bottom_n of_o the_o glass-globe_n be_v near_o 21_o inch_n whereof_o the_o embolus_fw-la reach_v to_o d_o near_o as_o low_a as_o h_n where_o the_o water_n be_v to_o be_v pump_v out_o be_v about_o 8_o inch_n from_o h_n to_o the_o upper_a surface_n of_o the_o glass_n near_o 4_o inch_n from_o the_o upper_a surface_n of_o the_o glass_n to_o the_o bottom_n of_o it_o about_o 9_o inch_n which_o be_v the_o diameter_n of_o the_o globular_a glass_n the_o continue_a pipe_n of_o the_o pump_n be_v less_o run_v into_o the_o glass_n about_o 7_o inch_n and_o so_o at_o e_o opening_z and_o end_v about_o 2_o inch_n from_o the_o bottom_n of_o the_o globular_a glass_n consequent_o from_o the_o low_a end_n of_o the_o sucker_n at_o d_o to_o the_o middle_n of_o the_o globular_a glass_n about_o 8_o inch_n and_o a_o half_a or_o 9_o inch_n the_o cavity_n of_o the_o pump_n itself_o near_o two_o inch_n diameter_n or_o thereabouts_o so_o that_o the_o air_n between_o the_o bottom_n of_o the_o embolus_fw-la and_o the_o top_n of_o the_o glass_n may_v be_v a_o cylinder_n of_o near_o 2_o inch_n diameter_n and_o about_o 4_o inch_n long_o by_o the_o tension_n whereof_o the_o water_n in_o half_a the_o glass_n be_v by_o i_o suppose_v to_o be_v attract_v and_o raise_v the_o other_o and_o upper_a half_n of_o the_o glass_n contain_v the_o other_o half_a of_o the_o globe_n and_o be_v fill_v with_o air_n which_o contain_v about_o 5_o pint_n which_o be_v more_o than_o twenty_o time_n the_o quantity_n of_o air_n contain_v in_o the_o pump_n between_o the_o low_a end_n of_o the_o embolus_fw-la and_o the_o top_n of_o the_o water_n i_o say_v by_o iterate_a pumping_n i_o draw_v out_o a_o quart_n of_o water_n which_o make_v the_o water_n subside_o in_o the_o low_a half_o of_o the_o bottle_n above_o a_o inch_n and_o a_o half_a and_o consequent_o the_o air_n in_o the_o upper_a half_n of_o the_o bottle_n expanded_a so_o that_o now_o it_o contain_v about_o 7_o pint_n of_o air_n after_o which_o it_o be_v not_o capable_a of_o a_o great_a expansion_n by_o my_o small_a pump_n the_o engine_n itself_o be_v more_o punctual_o describe_v in_o the_o 19_o the_o chapter_n of_o the_o nugae_fw-la but_o the_o dimension_n not_o so_o full_o mention_v there_o as_o here_o this_o instance_n i_o use_v as_o a_o evidence_n to_o prove_v the_o attraction_n of_o the_o water_n by_o the_o tension_n of_o that_o little_a portion_n of_o air_n in_o the_o cavity_n of_o the_o pump_n and_o the_o sequaciousness_n of_o the_o water_n to_o relieve_v that_o tension_n and_o to_o preserve_v the_o continuity_n of_o the_o mundana_fw-la materia_fw-la which_o in_o these_o remark_n be_v oppose_v by_o my_o learned_a antagonist_n and_o the_o instance_n be_v oppose_v upon_o this_o account_n that_o the_o air_n in_o the_o glass_n be_v tend_v from_o 7_o to_o 5_o whereas_o the_o air_n in_o the_o pump_n be_v tend_v from_o 1_o to_o 5_o space_n at_o least_o which_o be_v say_v be_v a_o evidence_n that_o there_o be_v no_o such_o tension_n for_o if_o
gravitation_n of_o the_o upper_a part_n upon_o the_o low_a so_o that_o although_o the_o superior_a part_n contribute_v to_o the_o total_a weight_n yet_o they_o do_v not_o superate_o and_o actual_o gravitate_fw-la upon_o the_o low_a part_n remark_n iii_o i_o must_v confess_v the_o substiturion_n of_o a_o hylarchical_a principle_n to_o perform_v all_o the_o phaenomena_n of_o motion_n in_o natural_a body_n be_v a_o compendious_a and_o easy_a way_n for_o the_o answer_n of_o all_o difficulty_n but_o he_o that_o but_o observe_v the_o instance_n here_o endeavour_v to_o be_v confute_v will_v find_v as_o in_o many_o other_o that_o i_o shall_v hereafter_o mention_v they_o do_v not_o stand_v in_o need_n of_o such_o a_o help_n for_o it_o be_v mere_o mechanical_a from_o the_o various_a libration_n of_o the_o water_n and_o oil_n at_o various_a immersion_n by_o a_o kind_n of_o invert_v natural_a balance_n between_o the_o water_n and_o oil_n in_o these_o various_a position_n therefore_o i_o shall_v refer_v the_o truth_n of_o the_o solution_n to_o the_o reader_n trial_n and_o what_o have_v be_v before_o say_v upon_o the_o former_a remark_n remark_n iu._n it_o be_v cautious_o say_v that_o in_o a_o manner_n i_o acknowledge_v what_o be_v endeavour_v to_o be_v prove_v in_o the_o first_o remark_n for_o in_o the_o atmosphere_n the_o air_n be_v more_o compound_v than_o above_o it_o and_o yet_o all_o be_v connex_v together_o by_o continuity_n and_o so_o in_o a_o manner_n i_o do_v not_o acknowledge_v it_o also_o touch_v the_o continuity_n of_o the_o air_n it_o be_v say_v by_o the_o author_n to_o be_v sufficient_o disprove_v but_o it_o be_v only_o say_v so_o and_o i_o think_v the_o continuity_n of_o the_o air_n be_v sufficient_o prove_v and_o in_o itself_o most_o evident_a if_o no_o proof_n be_v offer_v of_o it_o remark_n v._n the_o exclusion_n of_o innate_a gravity_n because_o the_o part_n compress_v will_v sensible_o gravitate_fw-la but_o do_v not_o sensible_o gravitate_fw-la before_o compression_n seem_v to_o i_o as_o strange_a a_o consequence_n as_o if_o a_o man_n shall_v say_v a_o feather_n have_v no_o sensible_a gravitation_n but_o a_o peck_n of_o feather_n put_v together_o have_v a_o sensible_a gravitation_n therefore_o there_o be_v no_o such_o thing_n as_o intrinsic_a gravity_n in_o the_o feather_n remark_n vi._n and_o i_o have_v before_o note_v that_o continuity_n consist_v not_o in_o the_o facility_n or_o difficulty_n of_o separation_n of_o part_n which_o yet_o till_o such_o separation_n be_v in_o continuity_n and_o when_o that_o separation_n be_v past_a may_v grow_v together_o into_o continuity_n again_o by_o the_o first_o contact_n of_o the_o separate_a part_n as_o the_o air_n and_o water_n do_v upon_o remove_v of_o what_o separate_v their_o part_n remark_n vii_o in_o the_o 4_o the_o chapter_n pag._n 64._o of_o the_o nugae_fw-la i_o have_v give_v a_o account_n touch_v the_o various_a pressure_n of_o solute_a and_o include_v water_n namely_o that_o in_o a_o siphon_n there_o describe_v the_o water_n in_o the_o open_a air_n pour_v into_o the_o long_a leg_n be_v 24_o inch_n depress_v the_o mercury_n 2_o inch_n and_o ¼_n and_o drive_v it_o out_o of_o the_o short_a leg_n but_o the_o solute_a water_n in_o a_o open_a tube_n incumbent_n upon_o the_o short_a leg_n drive_v back_o only_o one_o inch_n the_o long_a leg_n be_v empty_a now_o if_o the_o impel_a down_o of_o 2_o inch_n and_o ¼_n of_o mercury_n by_o the_o 24_o inch_n of_o water_n in_o the_o long_a leg_n be_v no_o more_o than_o the_o press_n down_o of_o one_o inch_n of_o mercury_n by_o the_o solute_a water_n of_o 24_o inch_n deep_a in_o the_o short_a leg_n the_o remarker_n be_v in_o the_o right_n and_o i_o be_v in_o the_o wrong_n but_o if_o these_o be_v differ_v pressure_n and_o the_o press_v down_o of_o one_o inch_n of_o the_o mercury_n by_o the_o solute_a water_n lean_v upon_o the_o short_a leg_n be_v less_o than_o the_o press_n of_o two_o inch_n and_o ¼_n by_o the_o 24_o inch_n of_o water_n include_v in_o the_o long_a leg_n than_o i_o be_v not_o mistake_v and_o a_o little_a arithmetic_n will_v serve_v to_o discover_v it_o the_o remark_n give_v this_o answer_n to_o this_o part_n of_o the_o experiment_n that_o more_o be_v impel_v up_o by_o the_o solute_a water_n because_o the_o short_a leg_n be_v wide_a and_o so_o require_v more_o mercury_n in_o the_o other_o leg_n to_o counterpoise_v it_o but_o to_o give_v the_o remark_n satisfaction_n herein_o i_o have_v make_v a_o most_o exact_a scrutiny_n into_o this_o part_n of_o the_o experiment_n and_o to_o the_o objection_n i_o give_v these_o answer_n 1._o the_o cavity_n of_o the_o siphon_n in_o the_o short_a leg_n be_v ⅛_n part_n of_o a_o inch_n or_o ¼_n of_o half_a a_o inch_n the_o breadth_n of_o the_o cavity_n of_o the_o long_a leg_n be_v not_o the_o 40_o the_o part_n of_o a_o inch_n less_o than_o the_o short_a which_o be_v so_o small_a a_o disproportion_n that_o it_o can_v scarce_o be_v sensible_a and_o this_o upon_o a_o exact_a admeasurement_n and_o again_o when_o the_o mercury_n in_o the_o short_a tube_n be_v depress_v a_o inch_n by_o the_o solute_a water_n incumbent_a upon_o it_o there_o be_v not_o any_o visible_a difference_n between_o the_o extent_n of_o the_o mercury_n drive_v up_o in_o the_o long_o and_o depress_v in_o the_o short_a leg_n both_o be_v indistinguishable_o the_o same_o viz._n a_o inch_n subside_v in_o the_o short_a and_o a_o inch_n only_o rise_v in_o the_o long_a leg_n which_o evidence_v the_o imperceptibleness_n of_o the_o difference_n 2._o if_o it_o give_v a_o advantage_n of_o raise_v of_o the_o mercury_n it_o must_v be_v to_o the_o short_a leg_n because_o it_o have_v a_o great_a mole_n of_o mercury_n in_o it_o and_o of_o water_n upon_o it_o 3._o but_o the_o truth_n be_v the_o pressure_n of_o water_n or_o mercury_n in_o a_o invert_v siphon_n be_v equal_a though_o the_o amplitude_n of_o the_o leg_n differ_v for_o fluid_n in_o that_o instance_n press_v secundum_fw-la altitudinem_fw-la or_o longitudinem_fw-la not_o secundum_fw-la amplitudinem_fw-la a_o siphon_n invert_v have_v one_o leg_n of_o 6_o inch_n diameter_n and_o the_o other_o but_o of_o a_o inch_n diameter_n fill_v with_o water_n or_o mercury_n will_v have_v their_o superficies_n of_o equal_a height_n notwithstanding_o the_o disproportion_n of_o their_o amplitude_n this_o part_n of_o the_o experiment_n therefore_o stand_v unshaken_a by_o the_o remark_n and_o therefore_o sure_o the_o experiment_n itself_o nor_o the_o collection_n thereupon_o make_v by_o the_o remark_n give_v little_a countenance_n to_o the_o magnify_a demonstration_n mention_v in_o the_o remark_n but_o conclude_v effectual_o against_o it_o indeed_o as_o to_o the_o second_o instance_n or_o trial_n which_o i_o call_v the_o double_a trial_n pag._n 66._o it_o have_v reasonable_o give_v a_o just_a cause_n of_o exception_n yet_o not_o without_o some_o mistake_n in_o the_o remark_n because_o it_o be_v try_v when_o two_o inch_n and_o more_o of_o the_o mercury_n be_v first_o drive_v out_o of_o the_o siphon_n by_o the_o water_n pour_v into_o the_o long_a leg_n and_o therefore_o i_o lay_v no_o weight_n upon_o it_o yet_o even_o there_o there_o be_v a_o disparity_n in_o the_o pressure_n of_o the_o solute_a and_o enclose_a water_n there_o be_v a_o great_a height_n of_o water_n press_v upon_o the_o mercury_n in_o the_o short_a leg_n than_o in_o the_o long_o but_o because_o this_o second_o trial_n be_v less_o evident_a i_o lay_v it_o aside_o yet_o howsoever_o this_o do_v not_o impeach_v the_o former_a trial_n nor_o the_o conclusion_n which_o i_o lay_v upon_o it_o viz._n that_o the_o force_n of_o the_o same_o column_n of_o water_n contract_v in_o the_o long_a leg_n of_o the_o siphon_n and_o have_v no_o other_o base_a but_o the_o mercury_n itself_o be_v of_o great_a force_n than_o the_o like_a column_n of_o solute_a water_n in_o the_o open_a vessel_n impend_v upon_o the_o short_a leg_n especial_o since_o in_o the_o one_o case_n and_o the_o other_o the_o open_a air_n give_v the_o most_o fair_a trial_n to_o the_o energy_n of_o both_o and_o therefore_o the_o disparity_n of_o the_o pressure_n of_o enclose_a and_o solute_a water_n which_o the_o remarker_n be_v pleasant_o dispose_v to_o call_v the_o masonry_n of_o the_o water_n be_v not_o hereby_o impeach_v nor_o the_o notable_a demonstration_n in_o the_o enchiridion_n metaphysicum_fw-la by_o the_o rundle_n of_o wood_n any_o way_n relieve_v and_o for_o evidence_n of_o the_o truth_n of_o the_o pressure_n of_o water_n secundum_fw-la altitudinem_fw-la and_o not_o secundum_fw-la amplitudinem_fw-la and_o also_o the_o disparity_n of_o pressure_n of_o solute_a water_n and_o water_n under_o a_o constriction_n to_o a_o narrow_a basis_n i_o have_v observe_v that_o if_o a_o tube_n of_o half_a a_o inch_n diameter_n and_o 4_o foot_n high_a
with_o a_o lumen_fw-la of_o a_o quarter_n of_o a_o inch_n diameter_n in_o the_o side_n near_o the_o base_a be_v fill_v with_o water_n the_o parabolical_a line_n that_o the_o water_n will_v make_v out_o of_o that_o vessel_n in_o its_o first_o exsilition_n will_v be_v as_o long_o yea_o and_o somewhat_o long_o than_o the_o like_a parabolical_a line_n make_v in_o the_o first_o exsilition_n by_o the_o like_a lumen_fw-la out_o of_o a_o vessel_n of_o six_o inch_n diameter_n and_o the_o same_o height_n which_o must_v needs_o proceed_v from_o the_o great_a pressure_n by_o that_o column_n of_o water_n that_o have_v a_o equal_a height_n but_o a_o base_a of_o more_o equality_n to_o the_o lumen_fw-la according_a to_o the_o subjoined_a figure_n remark_n viii_o ix_o the_o true_a reason_n of_o the_o rise_n of_o the_o rundle_n of_o wood_n be_v neither_o from_o the_o spirit_n of_o nature_n nor_o from_o a_o hylarchical_a principle_n but_o from_o the_o plain_a common_a know_v rule_n of_o hydrostaticks_n whereby_o necessary_o a_o fluid_a body_n drive_v up_o a_o solid_a body_n light_a than_o itself_o to_o the_o superficies_n if_o it_o can_v by_o any_o mean_n in_o the_o least_o proportion_n insinuate_v itself_o between_o the_o rundle_n and_o the_o base_a of_o the_o vessel_n and_o this_o be_v do_v by_o circumpulsion_n but_o as_o touch_v stevinus_n his_o experiment_n of_o the_o rundle_n cover_v a_o pertuse_n or_o hole_n in_o the_o basis_n of_o the_o vessel_n i_o must_v needs_o say_v stevinus_n deliver_v it_o in_o his_o observation_n upon_o the_o 10_o the_o proposition_n of_o his_o hydrostatiques_n from_o whence_o i_o transcribe_v it_o pag._n 94._o of_o the_o nugae_fw-la i_o have_v say_v enough_o touch_v this_o business_n before_o upon_o remark_n 19_o 20._o upon_o the_o essay_n i_o shall_v therefore_o short_o collect_v somewhat_o of_o what_o be_v there_o more_o full_o deliver_v if_o the_o rundle_n of_o wood_n be_v specifical_o light_a than_o a_o portion_n of_o water_n equal_a to_o its_o mole_n and_o the_o rundle_n be_v press_v down_o as_o contiguous_a as_o may_v be_v to_o the_o plain_a basis_n of_o the_o vessel_n yet_o it_o will_v rise_v for_o by_o reason_n of_o the_o porosity_n and_o chamfer_n of_o the_o wood_n all_o the_o industry_n imaginable_a will_v not_o press_v it_o so_o close_o but_o there_o will_v be_v some_o interstitia_fw-la between_o the_o rundle_n and_o the_o basis_n or_o bottom_n of_o the_o vessel_n into_o which_o the_o water_n will_v creep_v and_o so_o undermine_v and_o drive_v up_o the_o rundle_n to_o the_o superficies_n of_o the_o water_n by_o a_o ascend_a pressure_n of_o the_o water_n which_o ascend_v pressure_n be_v nevertheless_o wrought_v and_o effect_v first_o by_o a_o descent_n of_o the_o water_n round_o the_o side_n of_o the_o rundle_n and_o so_o by_o a_o kind_n of_o balance_n overweigh_a the_o rundle_n of_o wood_n and_o thereupon_o necessary_o weigh_v it_o up_o 2._o if_o the_o rundle_n be_v close_o fix_v to_o the_o bottom_n by_o a_o viscous_a or_o glutinous_a or_o thick_a oily_a matter_n that_o the_o water_n can_v get_v under_o it_o the_o rundle_n will_v not_o rise_v upon_o this_o double_a account_n 1._o because_o that_o adhere_a oil_n by_o the_o mutual_a adhesion_n to_o the_o rundle_n and_o base_a render_v the_o rundle_n consequential_o and_o effective_o and_o extrinsecal_o heavy_a by_o its_o adhesion_n than_o the_o like_a mole_n of_o water_n whereby_o the_o water_n can_v raise_v it_o but_o 2._o and_o principal_o because_o the_o interpose_a viscous_a oil_n do_v obstruct_v the_o migration_n or_o insinuation_n of_o the_o water_n between_o the_o rundle_n and_o basis_n or_o bottom_n of_o the_o vessel_n and_o so_o it_o can_v get_v under_o it_o to_o drive_v it_o up_o but_o stand_v now_o as_o one_o common_a fix_a base_a of_o the_o vessel_n unite_v to_o the_o true_a base_a thereof_o 3._o if_o there_o be_v a_o hole_n in_o the_o bottom_n of_o the_o vessel_n suppose_v of_o two_o inch_n diameter_n and_o the_o rundle_n of_o light_n wood_n be_v 4_o inch_n diameter_n and_o so_o overlap_v the_o orifice_n the_o rundle_n will_v not_o rise_v because_o the_o water_n notwithstanding_o all_o the_o care_n imaginable_a will_v creep_v under_o the_o side_n of_o the_o rundle_n and_o discharge_v itself_o gradual_o through_o the_o hole_n for_o the_o water_n have_v never_o so_o little_a passage_n through_o the_o pertuse_n or_o hole_n though_o not_o commensurate_a to_o the_o 40th_o part_n of_o its_o amplitude_n will_v contend_v and_o press_v that_o way_n and_o so_o gravitate_fw-la upon_o the_o rundle_n that_o lie_v in_o its_o way_n by_o its_o conatus_fw-la ad_fw-la motum_fw-la to_o that_o orifice_n where_o it_o find_v never_o so_o little_a vent_n that_o it_o may_v discharge_v itself_o for_o the_o water_n press_v upon_o and_o through_o the_o orifice_n do_v necessary_o press_v upon_o the_o interpose_a rundle_n 4._o and_o if_o the_o rundle_n of_o wood_n can_v be_v keep_v so_o close_o to_o the_o bottom_n either_o by_o its_o own_o exquisite_a smoothness_n which_o be_v hardly_o possible_a or_o by_o any_o viscous_a oil_n or_o by_o any_o fixation_n to_o the_o bottom_n or_o base_a of_o the_o vessel_n now_o it_o stand_v as_o one_o common_a base_a to_o the_o water_n as_o the_o rest_n of_o the_o bottom_n of_o the_o vessel_n do_v and_o be_v of_o no_o use_n to_o explicate_v the_o phaenomenon_n for_o it_o be_v all_o one_o as_o if_o it_o be_v one_o continue_v solid_a base_n to_o the_o vessel_n unmoved_a and_o unmoveable_a by_o the_o water_n and_o this_o upon_o more_o than_o one_o trial_n i_o find_v true_a and_o when_o due_o weigh_v it_o make_v nothing_o in_o favour_n of_o the_o remarker_n hypothesis_n or_o to_o the_o disadvantage_n of_o my_o supposition_n in_o the_o essay_n though_o i_o confess_v it_o do_v more_o distinct_o and_o clear_o explicate_v the_o phaenomenon_n remark_n x._o the_o adequate_a reason_n be_v true_o give_v by_o i_o if_o the_o glass_n be_v excessive_o strong_a or_o if_o it_o be_v fill_v with_o water_n it_o will_v not_o break_v because_o the_o internal_a water_n bear_v as_o strong_o against_o the_o external_a pressure_n of_o the_o external_a water_n as_o that_o can_v downward_o against_o it_o as_o we_o see_v in_o make_v new_a cut_n and_o river_n if_o there_o be_v a_o river_n with_o a_o small_a or_o weak_a bank_n on_o its_o south_n side_n and_o another_o cut_n of_o water_n be_v make_v on_o the_o south_n side_n of_o that_o slender_a bank_n the_o water_n in_o the_o river_n will_v not_o break_v the_o bank_n for_o the_o adjacent_a cut_n fill_v with_o water_n strengthen_v the_o bank_n by_o its_o renitence_n but_o if_o the_o cutt_n be_v empty_a of_o water_n the_o bank_n of_o the_o river_n will_v break_v because_o the_o conterminous_a air_n be_v not_o of_o strength_n enough_o to_o balance_v it_o the_o side_n of_o the_o glass-bottle_n of_o themselves_o be_v too_o weak_a to_o protect_v they_o and_o the_o include_v air_n capable_a of_o compression_n by_o the_o heavy_a element_n of_o water_n it_o want_v strength_n to_o protect_v it_o and_o so_o break_v but_o as_o for_o the_o air_n be_v out_o of_o its_o place_n when_o under_o water_n i_o have_v observe_v enough_o before_o of_o the_o vanity_n of_o that_o reason_n and_o the_o ensue_a remark_n will_v give_v i_o occasion_n to_o reinforce_v it_o remark_n xi_o if_o the_o remarker_n have_v be_v please_v to_o take_v notice_n of_o what_o be_v so_o often_o mention_v in_o both_o the_o tract_n upon_o which_o he_o remark_n and_o be_v of_o infallible_a truth_n that_o the_o pressure_n of_o water_n in_o this_o instance_n and_o divers_a other_o be_v never_o secundum_fw-la amplitudinem_fw-la but_o secundum_fw-la altitudinem_fw-la much_o of_o this_o remark_n may_v have_v be_v spare_v and_o the_o censure_n of_o absurdity_n will_v have_v be_v reserve_v to_o better_a purpose_n for_o the_o water_n in_o the_o pipe_n of_o one_o quarter_n of_o a_o inch_n diameter_n must_v be_v counterpoise_v with_o a_o cylinder_n of_o external_a water_n of_o equal_a height_n and_o length_n to_o that_o in_o the_o tube_n and_o if_o the_o height_n be_v less_o though_o the_o amplitude_n of_o the_o water_n be_v more_o it_o will_v not_o counterpoise_v it_o in_o this_o motion_n remark_n xii_o xiii_o i_o come_v to_o the_o instance_n which_o i_o call_v the_o valve_n he_o call_v the_o obturaculum_fw-la i_o have_v give_v my_o reason_n of_o that_o phaenomenon_n why_o the_o obturaculum_fw-la will_v not_o subside_o in_o such_o a_o immersion_n into_o water_n this_o be_v the_o subject_a of_o cap._n 6._o nugarum_fw-la pag._n 102_o etc._n etc._n and_o in_o the_o observation_n upon_o the_o remark_n which_o be_v this_o in_o effect_n when_o the_o whole_a tube_n with_o its_o valve_n close_v be_v counterpoise_v with_o a_o portion_n of_o water_n of_o great_a or_o at_o least_o equal_a weight_n to_o the_o whole_a instrument_n and_o of_o equal_a