a_o attempt_n for_o the_o explication_n of_o the_o phaenomena_n observable_a in_o a_o experiment_n publish_v by_o the_o honourable_a robert_n boyle_n esq_n in_o the_o xxxv_o experiment_n of_o his_o epistolical_a discourse_n touch_v the_o air_n in_o confirmation_n of_o a_o former_a conjecture_n make_v by_o r._n h._n nos_fw-la cum_fw-la non_fw-la semper_fw-la magna_fw-la refer_v possimus_fw-la vera_fw-la tamen_fw-la sed_fw-la rara_fw-la recitamus_fw-la neque_fw-la enim_fw-la minori_fw-la miraculo_fw-la in_o paruis_fw-la natura_fw-la ludit_fw-la quam_fw-la in_o magnis_fw-la cardan_n de_fw-fr vari_n l._n 8._o cap._n 43._o tum_o vero_fw-la de_fw-la scientiarum_fw-la progressu_fw-la spes_fw-la bene_fw-la fundabitur_fw-la quum_fw-la in_o historiam_fw-la naturalem_fw-la recipientur_fw-la &_o aggregabuntur_fw-la complura_fw-la experimenta_fw-la quae_fw-la in_o se_fw-la nullius_fw-la sunt_fw-la usus_fw-la sed_fw-la ad_fw-la inventionem_fw-la causarum_fw-la &_o axiomatum_n tanâ—um_fw-la 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include_v in_o little_a pipe_n where_o the_o pressure_n of_o the_o air_n have_v not_o so_o great_a a_o power_n to_o resist_v its_o rise_n but_o examine_v this_o way_n and_o find_v in_o it_o several_a difficulty_n almost_o irremoveable_a i_o think_v upon_o a_o way_n that_o will_v much_o more_o natural_o and_o conceiveable_o explain_v it_o which_o be_v by_o this_o follow_a experiment_n i_o take_v a_o glass_n tube_n of_o the_o form_n of_o that_o describe_v in_o the_o 6_o figure_n and_o choose_v two_o heterogeneous_a fluid_n such_o as_o water_n and_o oil_n i_o pour_v in_o as_o much_o water_n as_o fill_v up_o the_o pipe_n as_o high_a as_o a._n b._n then_o put_v in_o some_o oil_n into_o the_o tube_n a._n c._n i_o depress_v the_o superficies_n a._n of_o the_o water_n to_o e._n and_o b._n i_o raise_v to_o g._n which_o be_v not_o so_o high_a perpendicular_o as_o the_o superficies_n of_o the_o oil_n f._n by_o the_o space_n f._n 1_n wherefore_o the_o proportion_n of_o the_o gravity_n of_o these_o 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to_o pass_v may_v contain_v a_o salt_n that_o mix_v and_o unite_n with_o the_o sea_n salt_n may_v precipitate_v it_o much_o after_o the_o same_o manner_n as_o the_o alkalizate_n and_o acid_n salt_n mix_v and_o precipitate_v each_o other_o in_o the_o preparation_n of_o tartarum_fw-la vitriolatum_fw-la i_o know_v not_o also_o whether_o the_o exceed_a cold_a that_o must_v necessary_o be_v at_o the_o bottom_n of_o the_o water_n may_v not_o help_v towards_o this_o separation_n for_o we_o find_v that_o warm_a water_n be_v able_a to_o dissolve_v and_o contain_v more_o salt_n than_o the_o same_o cold_a insomuch_o that_o brines_n strong_o impregnate_v by_o heat_n if_o let_v cool_a do_v suffer_v much_o of_o their_o salt_n to_o subside_n and_o crystallise_v about_o the_o bottom_n and_o side_n i_o know_v not_o also_o whether_o the_o exceed_a pressure_n of_o the_o part_n of_o the_o water_n one_o against_o another_o may_v not_o keep_v the_o salt_n from_o descend_v to_o the_o very_a bottom_n as_o 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die_fw-la bis_fw-la undis_fw-la deficiens_fw-la &_o toties_fw-la exuberans_fw-la marinas_fw-la imitatur_fw-la instabilitates_fw-la that_o twice_o in_o four_o and_o twenty_o hour_n ebb_v and_o flow_v resemble_v the_o vustable_a motion_n of_o the_o sea_n the_o phanomena_n of_o which_o two_o may_v be_v easy_o make_v out_o by_o suppose_v their_o cavern_n by_o which_o they_o be_v feed_v to_o arise_v from_o the_o bottom_n of_o the_o next_o sea_n a_o three_o be_v a_o well_o upon_o the_o river_n ogmore_n in_o glamorganshire_n and_o near_o unto_o newton_n of_o which_o camhden_n relate_v himself_o to_o be_v certify_v by_o a_o letter_n from_o a_o learned_a friend_n of_o his_o that_o observe_v it_o fons_n abest_fw-la hinc_fw-la etc._n etc._n the_o letter_n be_v a_o little_a too_o long_o to_o be_v insert_v but_o the_o substance_n be_v this_o that_o this_o well_o ebb_v and_o flow_v quite_o contrary_o to_o the_o flow_a and_o ebb_v of_o the_o sea_n in_o those_o part_n for_o it_o be_v almost_o empty_a 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those_o of_o heat_n and_o light_n and_o consequent_o of_o rarefaction_n and_o condensation_n hardness_n or_o solidity_n and_o fluidness_n perspicuity_n and_o opacousness_n refraction_n and_o colour_n etc._n etc._n nay_o i_o know_v not_o whether_o there_o may_v be_v many_o thing_n do_v in_o nature_n in_o which_o this_o may_v not_o be_v say_v to_o have_v a_o finger_n this_o i_o may_v possible_o further_o inquire_v into_o and_o examine_v if_o god_n grant_v i_o life_n and_o opportunity_n in_o the_o mean_a time_n i_o will_v not_o be_v think_v guilty_a of_o that_o error_n which_o the_o thrice_o noble_a and_o learned_a verulam_n just_o take_v notice_n of_o as_o such_o and_o call_v philosophiae_fw-la genus_fw-la empiricum_fw-la quod_fw-la in_o paucorum_fw-la experimentorum_fw-la angustiis_fw-la &_o obscuritate_fw-la fundatum_fw-la est_fw-la for_o i_o neither_o conclude_v from_o one_o single_a experiment_n nor_o be_v the_o experiment_n i_o make_v use_n of_o all_o make_v upon_o one_o subject_a nor_o wrest_v i_o any_o experiment_n to_o make_v it_o quadrare_fw-la with_o any_o preconceived_a notion_n but_o on_o the_o contrary_a i_o endeavour_v to_o be_v conversant_a in_o all_o kind_n of_o experiment_n and_o all_o and_o every_o one_o of_o those_o trial_n i_o make_v the_o standard_n as_o i_o may_v say_v or_o touchstone_n by_o which_o i_o try_v all_o my_o former_a notion_n whether_o they_o hold_v not_o in_o weight_n and_o measure_n and_o touch_v etc._n etc._n for_o as_o that_o body_n be_v no_o other_o than_o a_o counterfeit_n gold_n which_o want_v any_o one_o of_o the_o propriety_n of_o gold_n such_o as_o be_v the_o malleableness_n weight_n colour_n fixtness_n in_o the_o fire_n indissolubleness_n in_o aquafortis_n and_o the_o like_a though_o it_o have_v all_o the_o other_o so_o will_v all_o those_o notion_n be_v find_v to_o be_v false_a and_o deceitful_a that_o will_v not_o undergo_v all_o the_o trial_n and_o test_n make_v of_o they_o by_o experiment_n and_o therefore_o such_o as_o will_v not_o come_v up_o to_o the_o desire_a apex_n of_o perfection_n i_o rather_o whole_o reject_v and_o take_v a_o new_a than_o by_o piece_v and_o patch_v endeavour_n to_o retain_v the_o old_a as_o know_v old_a thing_n to_o be_v rather_o make_v worse_o by_o mend_v than_o better_a and_o this_o course_n i_o learn_v from_o nature_n who_o we_o find_v neglectful_a of_o the_o old_a body_n and_o suffer_v it_o decay_v and_o infirmity_n to_o remain_v without_o repair_n and_o altogether_o solicitous_a and_o careful_a of_o perpetuate_a the_o species_n by_o new_a individual_n and_o it_o be_v certain_o the_o most_o likely_a way_n to_o erect_v a_o glorious_a and_o everlasting_a structure_n and_o temple_n to_o nature_n such_o as_o she_o will_v be_v find_v by_o any_o zealous_a votary_n to_o reside_v in_o first_o to_o raze_v the_o old_a pile_n build_v upon_o unstable_a fancy_n and_o unsound_a opinion_n and_o to_o begin_v a_o new_a upon_o a_o sure_a foundation_n of_o experiment_n thus_o medea_n when_o she_o renew_v old_a aeson_n first_o search_v heaven_n and_o earth_n gather_v and_o collect_v simple_n and_o ingredient_n of_o all_o kind_n nor_o will_v these_o do_v any_o thing_n till_o well_o mix_v concoct_v and_o digest_v omnia_fw-la confudit_fw-la summisque_fw-la immiscuit_fw-la ima_fw-la then_o we_o find_v she_o examine_v whether_o it_o will_v do_v what_o she_o expect_v ecce_fw-la vetus_fw-la calido_fw-la versatus_fw-la stipes_fw-la aheno_fw-la fit_a viridis_fw-la primo_fw-la nec_fw-la longo_fw-la tempore_fw-la frondes_fw-la induit_fw-la &_o subito_fw-la gravidis_fw-la oneratur_fw-la olivis_fw-la at_o quacunque_fw-la cavo_fw-la spumas_fw-la ejecit_fw-la aheno_fw-la ignis_fw-la &_o in_o terram_fw-la guttas_fw-la cecidere_fw-la calentes_fw-la vernat_fw-la humus_fw-la floresque_fw-la &_o mollia_fw-la pabula_fw-la surgunt_fw-la and_o find_v it_o to_o come_v up_o to_o what_o she_o desire_v she_o than_o begin_v her_o great_a work_n quae_fw-la simul_fw-la ac_fw-la vidit_fw-la stricto_fw-la medea_n recludit_fw-la ense_n senis_fw-la jugulum_fw-la veteremque_fw-la exire_fw-la cruorem_fw-la passa_fw-la replet_n succis_fw-la after_o which_o what_o succeed_v but_o a_o miraculous_a renovation_n barba_fw-la comaeque_fw-la canitie_fw-la posita_fw-la nigrum_fw-la rapuere_fw-la colorem_fw-la pulsa_fw-la fugit_fw-la macies_fw-la abeunt_fw-la pallorque_fw-la situsque_fw-la adjectoque_fw-la cavae_fw-la supplentur_fw-la corpore_fw-la rugae_fw-la membraque_fw-la luxuriant_a the_o application_n of_o it_o be_v obvious_a and_o therefore_o to_o digress_v no_o further_o from_o the_o consideration_n of_o the_o phaenomena_n more_o immediate_o explicable_a by_o this_o experiment_n we_o shall_v proceed_v to_o show_v that_o as_o to_o the_o rise_n of_o water_n in_o a_o filtre_n the_o reason_n of_o it_o will_v be_v manifest_a to_o he_o that_o do_v take_v notice_n that_o a_o filtre_n be_v constitute_v of_o a_o great_a number_n of_o small_a long_a solid_a body_n which_o lie_v so_o close_o together_o that_o the_o air_n in_o its_o get_n in_o between_o they_o do_v lose_v of_o its_o pressure_n that_o it_o have_v against_o the_o fluid_a without_o they_o by_o which_o mean_v the_o water_n or_o liquor_n not_o find_v so_o strong_a a_o resistance_n between_o they_o as_o be_v able_a to_o counter_a balance_n the_o pressure_n on_o its_o superficies_n without_o be_v raise_v upward_o till_o it_o meet_v with_o a_o pressure_n of_o the_o air_n which_o be_v able_a to_o hinder_v it_o and_o as_o to_o the_o rise_n of_o oil_n melt_v tallow_n spirit_n of_o wine_n etc._n etc._n in_o the_o weeck_n of_o a_o candle_n or_o lamp_n it_o be_v evident_a that_o it_o differ_v in_o nothing_o from_o the_o former_a save_v only_o in_o this_o that_o in_o a_o filtre_n the_o liquor_n descend_v and_o run_v away_o by_o another_o part_n and_o in_o the_o weeck_n the_o liquor_n be_v disperse_v and_o carry_v away_o by_o the_o flame_n which_o what_o it_o be_v and_o how_o it_o consume_v body_n i_o shall_v on_o some_o other_o occasion_n by_o many_o luciferous_a experiment_n manifest_o prove_v something_a there_o be_v ascribable_a to_o the_o heat_n for_o that_o it_o may_v rarify_v the_o more_o volatile_a and_o spirituous_a part_n of_o those_o combustible_a liquor_n and_o so_o be_v make_v light_a than_o the_o air_n it_o may_v be_v protrude_v upward_o by_o that_o more_o ponderous_a fluid_a body_n in_o the_o form_n of_o vapour_n but_o this_o can_v be_v ascribe_v to_o the_o ascension_n of_o but_o a_o very_a little_a and_o most_o likely_a of_o that_o only_a which_o ascend_v without_o the_o weeck_n as_o for_o the_o rise_n of_o it_o in_o a_o sponge_n bread_n cotton_n etc._n etc._n above_o the_o superficies_n of_o the_o subjacent_a liquor_n what_o have_v be_v say_v about_o the_o filtre_n if_o consider_v will_v easy_o suggest_v a_o reason_n consider_v that_o all_o these_o body_n be_v bind_v with_o small_a hole_n or_o pore_n from_o this_o same_o principle_n also_o viz._n the_o unequal_a pressure_n of_o the_o air_n against_o the_o unequal_a superficies_n of_o the_o water_n proceed_v the_o cause_n of_o the_o accession_n or_o incursion_n of_o any_o float_a body_n against_o the_o side_n of_o the_o contain_v vessel_n or_o the_o appropinquation_n of_o two_o float_a body_n as_o bubble_n cork_n stick_n straw_n etc._n etc._n one_o towards_o another_o as_o for_o instance_n take_v a_o glass-jar_n such_o as_o a._n b._n in_o the_o seven_o figure_n and_o fill_v it_o pretty_a near_o the_o top_n with_o water_n throw_v into_o it_o a_o small_a round_a piece_n of_o cork_n as_o c._n and_o plunge_v it_o all_o over_o in_o water_n that_o it_o be_v wet_a so_o as_o that_o the_o water_n may_v rise_v up_o by_o the_o side_n of_o it_o then_o place_v it_o any_o where_o upon_o the_o superficies_n about_o a_o inch_n or_o one_o inch_n and_o a_o quarter_n from_o any_o side_n and_o you_o shall_v perceive_v it_o by_o degree_n to_o make_v perpendicular_o towards_o the_o near_a part_n of_o the_o side_n and_o the_o near_a it_o approach_v it_o the_o fast_a to_o be_v move_v the_o reason_n of_o which_o phaenomenon_n will_v be_v find_v no_o other_o than_o this_o that_o the_o air_n have_v a_o great_a pressure_n against_o the_o middle_n of_o the_o superficies_n than_o it_o have_v against_o those_o part_n that_o approach_v near_o and_o be_v contiguous_a to_o the_o side_n now_o that_o the_o pressure_n be_v not_o so_o much_o may_v as_o i_o show_v before_o in_o the_o explication_n of_o the_o 3_o d_o figure_n be_v evince_v from_o the_o rise_n of_o the_o water_n near_o the_o side_n high_a than_o that_o in_o the_o middle_n hence_o the_o ball_n have_v a_o strong_a pressure_n against_o that_o side_n of_o it_o which_o respect_v the_o middle_a of_o the_o superficies_n than_o against_o that_o which_o respect_v the_o approximate_a side_n must_v necessary_o move_v towards_o that_o part_n from_o whence_o it_o find_v least_o resistance_n and_o so_o be_v accelerate_a as_o the_o resistance_n decrease_v hence_o the_o more_o the_o water_n be_v raise_v under_o that_o part_n of_o its_o way_n it_o be_v pass_v above_o
if_o never_o so_o little_o situate_v out_o of_o its_o horizontale_a paralelisme_n and_o water_n that_o will_v wet_v salt_n and_o dissolve_v it_o will_v slip_v off_o from_o tallow_n or_o the_o like_a without_o at_o all_o adhere_n as_o it_o may_v likewise_o be_v observe_v to_o do_v upon_o a_o dusty_a superficies_n and_o next_o they_o cause_v the_o part_n of_o homogeneal_a fluid_a body_n ready_o to_o adhere_v together_o and_o mix_v and_o of_o heterogeneal_a to_o be_v exceed_o averse_a thereunto_o hence_o we_o find_v that_o two_o small_a drop_n of_o water_n on_o any_o superficies_n they_o can_v roll_n on_o will_n if_o they_o chance_v to_o touch_v each_o other_o ready_o unite_v and_o mix_v in_o one_o 3d._n globule_n or_o drop_n the_o like_a may_v be_v observe_v with_o two_o small_a bowl_n of_o quicksilver_n upon_o a_o table_n or_o glass_n provide_v the_o surface_n of_o those_o globule_n be_v not_o dusty_a and_o with_o two_o drop_n of_o oil_n upon_o fair_a water_n etc._n etc._n and_o further_o water_n put_v unto_o wine_n salt_n water_n vinegar_n spirit_n of_o wine_n or_o the_o like_a do_v immediate_o especial_o if_o they_o be_v shake_v together_o disperse_v itself_o all_o over_o they_o hence_o on_o the_o contrary_a also_o we_o find_v that_o water_n pour_v upon_o quicksilver_n and_o oil_n upon_o that_o water_n and_o air_n upon_o that_o oil_n though_o they_o be_v stop_v close_o up_o into_o a_o bottle_n and_o shake_v never_o so_o much_o they_o will_v by_o no_o mean_n long_o suffer_v any_o of_o their_o big_a part_n to_o be_v unite_v or_o include_v within_o any_o of_o the_o other_o liquor_n by_o which_o recite_v liquor_n may_v be_v plain_o enough_o represent_v the_o 4_o peripaterical_a element_n from_o this_o property_n it_o be_v that_o a_o drop_n of_o water_n do_v not_o mingle_v with_o or_o vanish_v into_o air_n but_o be_v drive_v by_o that_o fluid_a equality_n protrude_a it_o on_o every_o side_n and_o force_v into_o as_o little_a a_o space_n as_o it_o can_v possible_o be_v contain_v in_o namely_o into_o a_o round_a globule_n so_o likewise_o a_o little_a air_n blow_v under_o the_o water_n be_v unite_v or_o thrust_v into_o a_o bubble_n by_o the_o ambient_fw-la water_n and_o a_o parcel_n of_o quicksilver_n enclose_v with_o air_n water_n or_o almost_o any_o other_o liquor_n be_v form_v into_o a_o round_a ball._n now_o the_o cause_n why_o all_o these_o include_v fluid_n new_o mention_v or_o as_o many_o other_o as_o be_v whole_o include_v within_o a_o heterogeneous_a fluid_fw-la be_v not_o exact_o of_o a_o spherical_a figure_n see_v that_o if_o cause_v by_o these_o principle_n only_o it_o can_v be_v of_o no_o other_o must_v proceed_v from_o some_o other_o kind_n of_o pressure_n against_o the_o two_o opposite_a flat_v side_n this_o adventitious_a or_o accidental_a pressure_n may_v proceed_v from_o divers_a cause_n and_o according_o must_v diversify_v the_o figure_n of_o the_o include_v heterogeneous_a fluid_n for_o see_v that_o a_o body_n may_v be_v include_v either_o with_o a_o fluid_a only_o or_o only_o with_o a_o solid_a or_o partly_o with_o a_o fluid_a and_o partly_o with_o a_o solid_a or_o partly_o with_o one_o fluid_a and_o partly_o with_o another_o there_o will_v be_v find_v a_o very_a great_a variety_n of_o the_o terminate_a surface_n much_o differ_v from_o a_o spherical_a according_a to_o the_o various_a resistance_n or_o pressure_n that_o belong_v to_o each_o of_o these_o encompass_v medium_n which_o property_n may_v in_o general_n be_v deduce_v from_o two_o head_n viz._n motion_n and_o rest._n for_o either_o this_o globular_a figure_n be_v alter_v by_o a_o natural_a motion_n such_o as_o be_v gravity_n or_o a_o violent_a such_o as_o iâ—_n any_o accidental_a motion_n of_o the_o fluid_n as_o we_o see_v in_o the_o wind_n ruffle_a up_o the_o water_n and_o the_o purl_n of_o stream_n and_o foam_v of_o cartaract_n and_o the_o like_a which_o because_o they_o be_v so_o obvious_a and_o easy_o understand_v and_o so_o little_a pertinent_a to_o our_o present_a enquiry_n i_o shall_v refer_v to_o some_o other_o intend_a speculation_n to_o which_o they_o do_v more_o proper_o belong_v or_o three_o by_o the_o firmness_n and_o stability_n of_o the_o ambient_fw-la solid_a for_o if_o the_o include_v solid_n be_v of_o a_o angular_a or_o any_o other_o irregular_a form_n the_o include_v fluid_a will_v be_v near_o of_o the_o like_a as_o a_o pint_n pot_n full_a of_o water_n or_o a_o bladder_n full_a of_o air._n and_o next_o if_o the_o including_z or_o include_v fluid_a have_v a_o great_a gravity_n one_o than_o another_o then_o will_v the_o globular_a form_n be_v depress_v into_o a_o eliptico-spherical_a as_o if_o for_o example_n we_o suppose_v the_o circle_n a._n b._n c._n d._n in_o the_o first_o figure_n to_o represent_v a_o drop_n of_o water_n quicksilver_n or_o the_o like_a include_v with_o the_o air_n or_o the_o like_a which_o suppose_v there_o be_v no_o gravity_n at_o all_o in_o either_o of_o the_o fluid_n or_o that_o the_o contain_v and_o contain_v be_v of_o the_o same_o weight_n will_v be_v equal_o depress_v into_o a_o exactly-spherical_a body_n the_o ambient_fw-la press_v equal_o against_o every_o side_n of_o it_o but_o suppose_v either_o a_o great_a gravity_n in_o the_o include_v by_o reason_n whereof_o the_o part_n of_o it_o be_v press_v from_o a._n towards_o b._n and_o thereby_o the_o whole_a put_v into_o motion_n and_o that_o motion_n be_v hinder_v by_o the_o resistance_n of_o the_o subjacent_a part_n of_o the_o ambient_fw-la the_o globular_a figure_n a._n d._n b._n c._n will_v be_v depress_v into_o the_o eliptico-spherical_a e._n g._n f._n h._n for_o the_o side_n a._n be_v detrude_v to_o e._n by_o the_o gravity_n and_o b._n to_o f._n by_o the_o resistance_n of_o the_o subjacent_a medium_n and_o therefore_o c._n must_v necessary_o be_v thrust_v to_o g._n and_o d._n to_o h._n or_o else_o suppose_v a_o great_a gravity_n in_o the_o ambient_fw-la by_o who_o more_o than_o ordinary_a pressure_n against_o the_o under_o side_n of_o the_o include_v globul_a b._n will_v be_v force_v to_o f._n &_o by_o its_o resistance_n of_o the_o motion_n upward_o the_o side_n a._n will_v be_v depress_v to_o e._n and_o therefore_o c._n be_v thrust_v to_o g._n &_o d._n to_o h._n the_o globular_a figure_n by_o this_o mean_n also_o will_v be_v make_v a_o eliptico-spherical_a next_o if_o a_o fluid_a be_v include_v partly_o with_o one_o and_o partly_o with_o another_o fluid_a it_o will_v be_v find_v to_o be_v shape_v diverse_o according_a to_o the_o proportion_n of_o the_o gravity_n and_o incongruity_n of_o the_o 3_o fluid_n one_o to_o another_o as_o in_o the_o second_o figure_n let_v the_o upper_a m_n m_o m_o be_n air_n the_o middle_a l._n m._n n._n o_o be_v common_a oil_n the_o low_a o._n o._n o._n be_v water_n the_o oil_n will_v be_v form_v not_o into_o a_o spherical_a figure_n such_o as_o be_v represent_v by_o the_o prick_a line_n but_o into_o such_o a_o figure_n as_o l._n m._n n._n o._n who_o side_n l._n m._n n._n will_v be_v of_o a_o flatter_v eliptical_a figure_n by_o reason_n of_o the_o great_a disproportion_n between_o the_o gravity_n of_o oil_n and_o air_n and_o the_o side_n l._n o._n m._n of_o a_o round_a because_o of_o the_o small_a difference_n between_o the_o weight_n of_o oil_n and_o water_n last_o the_o globular_a figure_n will_v be_v change_v if_o the_o ambient_fw-la be_v partly_o fluid_a and_o partly_o solid_a and_o here_o the_o termination_n of_o the_o encompass_v fluid_a towards_o the_o encompass_v be_v shape_v according_a to_o the_o proportion_n of_o the_o congruity_n or_o incongruity_n of_o the_o fluid_n to_o the_o solid_n and_o of_o the_o gravity_n and_o incongruity_n of_o the_o fluid_v one_o to_o another_o as_o suppose_v the_o subjacent_a medium_n that_o hinder_v a_o include_v fluid_n descent_n be_v a_o solid_a as_o let_v k._n l._n in_o the_o first_o figure_n represent_v the_o smooth_a superficies_n of_o a_o table_n e._n g._n f._n h._n a_o parcel_n of_o run_v mercury_n the_o side_n g._n f._n h._n will_v be_v more_o flat_v according_a to_o the_o proportion_n of_o the_o incongruity_n of_o the_o mercury_n and_o air_n to_o the_o wood_n and_o of_o the_o gravity_n of_o mercury_n and_o air_n one_o to_o another_o the_o side_n g._n e._n h._n will_v likewise_o be_v a_o little_a more_o depress_v by_o reason_n the_o subjacent_a part_n be_v now_o at_o rest_n which_o be_v before_o in_o motion_n i_o have_v not_o here_o time_n nor_o be_v it_o much_o to_o my_o present_a purpose_n to_o show_v how_o much_o the_o figure_n of_o the_o descend_a fluid_n may_v be_v alter_v from_o this_o eliptico_n spherical_a figure_n by_o a_o very_a small_a resistance_n of_o the_o subjacent_a medium_n for_o the_o advantage_n the_o under_o part_n of_o the_o descendent_a may_v have_v as_o to_o the_o
acceleration_n of_o their_o motion_n of_o descent_n may_v be_v able_a to_o draw_v they_o out_o into_o the_o form_n of_o the_o figure_n x._o or_o further_o in_o the_o 3d._a figure_n let_v a._n i._n l._n d._n represent_v a_o include_v solid_a medium_n of_o a_o cylindrical_a shape_n as_o suppose_v a_o small_a glass_n jar_v let_v f._n g._n e._n m._n represent_v a_o contain_v fluid_a as_o water_n this_o towards_o the_o bottom_n and_o side_n be_v figure_v according_a to_o the_o concavity_n of_o the_o glass_n but_o its_o upper_a surface_n which_o by_o reason_n of_o its_o gravity_n not_o consider_v at_o all_o the_o air_n above_o it_o and_o so_o neither_o the_o congruity_n or_o incongruity_n of_o either_o of_o they_o to_o the_o glass_n shall_v be_v terminate_v by_o part_n of_o a_o sphere_n who_o diameter_n shall_v be_v the_o same_o with_o that_o of_o the_o earth_n which_o to_o our_o sense_n will_v appear_v a_o straight_a line_n as_o f._n g_z e._n or_o which_o by_o reason_n of_o its_o have_v a_o great_a congruity_n to_o glass_n than_o air_n have_v not_o consider_v its_o gravity_n will_v be_v thrust_v into_o a_o concave_a sphere_n as_o c._n h._n b._n who_o diameter_n will_v be_v the_o same_o with_o that_o of_o the_o concavity_n of_o the_o vessel_n but_o by_o reason_n of_o its_o have_v a_o great_a gravity_n than_o the_o air_n and_o have_v likewise_o a_o great_a congruity_n to_o glass_n than_o the_o air_n have_v from_o hence_o i_o say_v it_o be_v terminate_v by_o a_o concave_n eliptico-spherical_a figure_n as_o c._n k._n b._n for_o by_o its_o congruity_n it_o easy_o conform_v itself_o and_o adhere_v to_o the_o glass_n and_o constitute_v as_o it_o be_v one_o contain_v body_n with_o it_o and_o therefore_o shall_v thrust_v the_o contain_v air_n on_o that_o side_n it_o touch_v it_o into_o a_o spherical_a figure_n as_o b._n h._n c._n but_o the_o motion_n of_o gravity_n depress_v a_o little_a the_o corner_n b._n and_o c._n reduce_v it_o into_o the_o aforesaid_a figure_n c._n k._n b._n now_o that_o it_o be_v the_o great_a congruity_n of_o one_o of_o the_o two_o contiguous_a fluid_n than_o of_o the_o other_o to_o the_o contain_v solid_a that_o cause_v the_o separate_a surface_n of_o the_o two_o liquid_n to_o be_v thus_o or_o thus_o figure_v and_o that_o it_o be_v not_o because_o this_o or_o that_o figurated_a surface_n be_v more_o proper_a natural_a or_o peculiar_a to_o one_o of_o these_o fluid_a body_n than_o to_o the_o other_o will_v appear_v from_o this_o that_o the_o same_o fluid_n will_v by_o be_v put_v into_o differ_v solid_n change_v their_o surface_n for_o the_o same_o water_n which_o in_o a_o glass_n or_o wooden_a vessel_n will_v have_v a_o concave_a surface_n upward_o and_o will_v rise_v high_o in_o a_o small_a then_o great_a pipe_n the_o same_o water_n i_o say_v in_o the_o same_o pipe_n grease_v over_o or_o oil_v will_v produce_v quite_o contrary_a effect_n for_o it_o will_v have_v a_o protuberant_a and_o convex_a surface_n upward_o and_o will_v not_o rise_v so_o high_a in_o small_a as_o in_o big_a pipe_n nay_o in_o the_o very_a same_o solid_a vessel_n you_o may_v make_v the_o very_a same_o two_o contiguous_a liquid_n to_o alter_v their_o surface_n for_o take_v a_o small_a wine-glass_n or_o such_o like_a vessel_n and_o pour_v water_n gentle_o into_o it_o you_o shall_v perceive_v the_o surface_n of_o the_o water_n all_o the_o way_n concave_a till_o it_o rise_v even_o with_o the_o top_n when_o you_o shall_v find_v it_o if_o you_o gentle_o and_o careful_o pour_v in_o more_o to_o grow_v very_o protuberant_a and_o convex_a the_o reason_n of_o which_o be_v plain_a for_o that_o the_o solid_a side_n of_o the_o contain_v body_n be_v no_o long_o extend_v to_o which_o the_o water_n do_v more_o ready_o adhere_v than_o the_o air_n but_o it_o be_v henceforth_o to_o be_v include_v with_o air_n which_o will_v reduce_v it_o into_o a_o hemisphere_n but_o by_o reason_n of_o its_o gravity_n it_o be_v flat_v into_o a_o oval_a quicksilver_n also_o which_o to_o glass_n be_v more_o incongruous_a than_o air_n and_o thereby_o be_v put_v into_o a_o glass-pipe_n will_v not_o adhere_v to_o it_o but_o by_o the_o more_o congruous_a air_n will_v be_v force_v to_o have_v a_o very_a protuberant_a surface_n and_o to_o rise_v high_o in_o a_o great_a than_o a_o lesser_a pipe_n this_o quicksilver_n to_o clean_a metal_n especial_o to_o gold_n silver_n tin_n lead_v etc._n etc._n iron_n except_v be_v more_o congruous_a than_o air_n and_o will_v not_o only_o stick_v to_o it_o but_o have_v a_o concave_a surface_n like_o water_n and_o rise_v high_o in_o a_o less_o than_o in_o a_o great_a pipe_n in_o all_o these_o example_n it_o be_v evident_a that_o there_o be_v a_o extaordinary_a and_o adventitious_a force_n by_o which_o the_o globular_a figure_n of_o the_o contain_v heterogeneous_a fluid_n be_v alter_v neither_o can_v it_o be_v imagine_v how_o it_o shall_v otherwise_o be_v of_o any_o other_o figure_n than_o globular_a for_o be_v by_o the_o heterogeneous_a fluid_n equal_o protrude_v every_o way_n whatsoever_o part_n be_v protuberant_a will_v be_v thereby_o depress_v from_o this_o cause_n it_o be_v that_o in_o its_o effect_n it_o do_v very_o much_o resemble_v a_o round_a spring_n such_o as_o a_o hoop_n i_o shall_v not_o here_o speak_v of_o the_o nature_n of_o spring_n in_o general_a as_o be_v more_o proper_a for_o another_o discourse_n but_o only_o take_v notice_n that_o as_o in_o a_o round_a spring_n there_o be_v require_v a_o additional_a pressure_n against_o two_o opposite_a side_n to_o reduce_v it_o into_o a_o oval_a form_n or_o to_o force_v it_o in_o between_o the_o side_n of_o a_o hole_n who_o diameter_n be_v less_o than_o that_o of_o the_o spring_n there_o must_v be_v a_o considerable_a force_n or_o protrusion_n against_o the_o concave_n or_o inner_a side_n of_o the_o spring_n â—o_o to_o alter_v this_o spherical_a constitution_n of_o a_o include_v fluid_a body_n there_o be_v require_v more_o pressure_n against_o opposite_a side_n to_o reduce_v it_o into_o a_o oval_a and_o to_o press_v it_o into_o a_o hole_n less_o in_o diameter_n than_o itself_o it_o require_v a_o great_a protrusion_n against_o all_o the_o other_o side_n what_o degree_n of_o force_n be_v requisite_a to_o reduce_v they_o into_o long_a and_o long_a oval_n or_o to_o press_v they_o into_o less_o and_o less_o hole_n i_o have_v not_o yet_o experimental_o calculate_v but_o thus_o much_o by_o experiment_n i_o find_v in_o general_a that_o there_o be_v always_o require_v a_o great_a pressure_n to_o close_v they_o into_o long_a oval_n or_o protrude_v they_o into_o small_a hole_n the_o necessity_n and_o reason_n of_o this_o be_v it_o requisite_a i_o can_v easy_o explain_v but_o be_v not_o so_o necessary_a and_o require_v more_o room_n and_o time_n than_o i_o have_v for_o it_o at_o present_a i_o shall_v here_o omit_v it_o and_o proceed_v to_o show_v that_o this_o may_v be_v present_o find_v true_a if_o experiment_n be_v make_v with_o a_o round_a spring_n the_o way_n of_o which_o trial_n can_v scarce_o be_v miss_v by_o any_o one_o at_o all_o conversant_a in_o experiment_n and_o with_o the_o fluid_a body_n of_o mercury_n air_n etc._n etc._n the_o way_n of_o try_v which_o will_v be_v somewhat_o more_o difficult_a and_o therefore_o i_o shall_v in_o brief_a describe_v it_o he_o therefore_o that_o will_v try_v with_o air_n must_v first_o be_v provide_v of_o a_o glass-pipe_n make_v of_o the_o shape_n of_o that_o in_o the_o five_o figure_n whereof_o of_o the_o side_n a._n b._n represent_v a_o straight_a tube_n of_o about_o 3_o foot_n long_o c._n d._n represent_v a_o other_o part_n of_o it_o which_o consist_v of_o c._n e._n f._n g._n d._n etc._n etc._n several_a round_a bubble_n so_o order_v that_o there_o be_v leave_v a_o passage_n out_o of_o each_o of_o they_o into_o its_o next_o of_o which_o passage_n that_o between_o c._n and_o e._n be_v to_o be_v the_o big_a as_o for_o example_n â…™_n of_o a_o inch_n in_o diameter_n that_o between_o e._n and_o f._n be_v to_o be_v less_o viz._n â…›_n of_o a_o inch_n that_o between_o f._n and_o g._n 1_o 12_o of_o a_o inch_n that_o between_o g._n and_o d._n 1_o 16_o that_o above_o d_o 1_o 24_o or_o half_o a_o line_n there_o may_v be_v add_v as_o many_o more_o as_o the_o experimenter_n shall_v think_v fit_a with_o passage_n or_o interjacent_a hole_n continual_o decrease_v by_o know_a quantity_n so_o far_o as_o his_o sense_n be_v able_a to_o help_v he_o i_o say_v so_o far_o because_o there_o may_v be_v make_v pipe_n so_o small_a that_o it_o will_v be_v impossible_a to_o perceive_v the_o perforation_n with_o one_o naked_a eye_n though_o by_o the_o help_n of_o a_o microscope_n it_o may_v easy_o enough_o be_v perceive_v nay_o i_o have_v
make_v a_o pipe_n perforate_v from_o end_n to_o end_n so_o small_a that_o with_o your_o naked_a eye_n you_o will_v very_o hardly_o have_v see_v the_o body_n of_o it_o insomuch_o that_o i_o have_v be_v able_a to_o knit_v it_o up_o into_o a_o knot_n without_o break_v but_o this_o by_o the_o by_o to_o proceed_v then_o for_o the_o trial_n of_o the_o experiment_n the_o experimenter_n must_v place_v the_o tube_n a._n b._n perpendicular_a and_o fill_v the_o bubble_n e._n with_o the_o passage_n beneath_o it_o full_a of_o water_n but_o leave_v the_o bubble_n c._n full_a of_o air_n and_o then_o gentle_o pour_v in_o water_n into_o the_o pipe_n a._n b._n he_o must_v observe_v diligent_o how_o high_a the_o water_n will_v rise_v in_o it_o before_o it_o protrude_v the_o bubble_n of_o air_n c._n through_o the_o narrow_a passage_n into_o e._n and_o denote_v exact_o the_o height_n of_o the_o cylinder_n of_o water_n then_o fill_v the_o bubble_n f._n with_o water_n and_o e._n with_o air_n he_o may_v proceed_v as_o former_o denote_v likewise_o the_o height_n of_o the_o cylinder_n of_o water_n able_a to_o protrude_v the_o bubble_n e._n through_o the_o passage_n e._n f._n the_o like_a may_v be_v do_v with_o the_o next_o passage_n and_o the_o next_o etc._n etc._n as_o far_o as_o he_o be_v able_a then_o compare_v the_o several_a height_n of_o the_o cylinder_n with_o the_o several_a hole_n through_o which_o each_o cylinder_n do_v force_v the_o air_n have_v due_a regard_n to_o the_o cylinder_n of_o water_n in_o the_o tube_n c._n d_o it_o will_v be_v very_o easy_a to_o determine_v what_o force_n be_v requisite_a to_o press_v the_o air_n into_o such_o and_o such_o a_o hole_n or_o to_o apply_v it_o to_o our_o present_a experiment_n how_o much_o of_o the_o pressure_n of_o the_o air_n be_v take_v off_o by_o its_o ingress_n into_o small_a and_o small_a hole_n now_o because_o to_o prepare_v this_o instrument_n be_v something_o difficult_a by_o reason_n of_o the_o hole_n which_o will_v be_v find_v very_o troublesome_a to_o be_v measure_v it_o will_v be_v better_a to_o prepare_v small_a glass-pipe_n such_o as_o f._n g._n h._n i._o k._n l._n of_o the_o several_a boar_n desire_v each_o of_o they_o about_o a_o inch_n long_o and_o have_v a_o pipe_n such_o as_o be_v describe_v in_o the_o 5_o figure_n with_o only_o one_o bubble_n as_o c_z with_o the_o passage_n c._n e_o and_o proceed_v as_o before_o to_o force_v the_o air_n first_o through_o that_o then_o to_o fasten_v into_o it_o with_o cement_v the_o next_o small_a pipe_n and_o try_v with_o it_o as_o with_o the_o other_o then_o a_o less_o and_o so_o to_o the_o least_o denote_v compare_v and_o collect_v as_o before_o from_o these_o and_o other_o such_o trial_n it_o will_v be_v find_v very_o evident_a that_o to_o force_v the_o air_n or_o other_o fluid_a into_o a_o small_a hole_n of_o a_o incongruous_a solid_a there_o be_v require_v a_o great_a force_n than_o there_o be_v requisite_a for_o the_o protrusion_n of_o it_o into_o a_o big_a come_v we_o therefore_o to_o the_o explanation_n of_o the_o phaenomena_n in_o the_o experiment_n of_o the_o rise_n of_o water_n in_o a_o small_a pipe_n and_o from_o the_o application_n of_o what_o have_v be_v say_v to_o the_o enter_v of_o the_o air_n into_o the_o big_a hole_n of_o the_o vessel_n and_o into_o the_o small_a hole_n of_o the_o pipe_n we_o shall_v clear_o find_v that_o there_o be_v a_o great_a pressure_n of_o the_o air_n upon_o the_o water_n in_o the_o vessel_n or_o great_a pipe_n than_o there_o be_v upon_o that_o in_o the_o lesser_a pipe_n for_o since_o the_o pressure_n of_o the_o air_n every_o way_n be_v find_v to_o be_v as_o much_o as_o be_v able_a to_o press_v up_o and_o sustain_v a_o cylinder_n of_o quicksilver_n of_o two_o foot_n and_o a_o half_a high_a or_o thereabouts_o and_o since_o of_o this_o pressure_n so_o many_o more_o degree_n be_v require_v to_o force_v the_o air_n into_o a_o small_a than_o into_o a_o great_a hole_n that_o be_v full_a of_o a_o more_o congruous_a fluid_n and_o last_o since_o those_o degree_n that_o be_v requisite_a to_o press_v it_o in_o be_v thereby_o take_v off_o from_o the_o air_n within_o and_o the_o air_n within_o leave_v with_o so_o many_o degree_n of_o pressure_n less_o than_o the_o air_n without_o it_o will_v follow_v that_o the_o air_n in_o the_o less_o tube_n or_o pipe_n will_v have_v less_o pressure_n against_o the_o superficies_n of_o the_o water_n therein_o than_o the_o air_n in_o the_o big_a which_o be_v the_o minor_a proposition_n to_o be_v prove_v the_o conclusion_n therefore_o will_v necessary_o follow_v viz._n that_o this_o unequal_a pressure_n of_o the_o air_n cause_v by_o its_o protrusion_n into_o unequal_a hole_n be_v a_o cause_n sufficient_a to_o produce_v this_o effect_n without_o the_o help_n of_o any_o other_o concurrent_a and_o therefore_o be_v the_o principal_a if_o not_o the_o only_a cause_n of_o this_o phaenomenon_n this_o therefore_o be_v thus_o explain_v there_o will_v be_v divers_a phaenomena_n explicable_a thereby_o as_o the_o rise_n of_o liquor_n in_o a_o filtre_n the_o rise_n of_o spirit_n of_o wine_n oil_n melt_v tallow_n etc._n etc._n in_o the_o weak_a of_o a_o lamp_n though_o make_v of_o small_a wire_n thread_n of_o asbestus_n string_n of_o glass_n or_o the_o like_a the_o rise_n of_o liquor_n in_o a_o sponge_n piece_n of_o bread_n perhaps_o also_o the_o ascend_a of_o the_o sap_n in_o tree_n and_o plant_n through_o their_o small_a and_o some_o of_o they_o imperceptible_a pore_n of_o which_o perhaps_o i_o may_v say_v more_o on_o another_o occasion_n at_o least_o the_o pass_v of_o it_o out_o of_o the_o earth_n into_o their_o root_n i_o know_v not_o also_o whether_o it_o will_v be_v requisite_a to_o add_v what_o thing_n occur_v to_o my_o thought_n when_o i_o have_v these_o phaenomena_n under_o consideration_n which_o i_o shall_v only_o propound_v as_o query_n that_o may_v serve_v as_o hint_n to_o some_o further_a discovery_n and_o not_o as_o axiom_n in_o short_a they_o be_v these_o first_o upon_o the_o consideration_n of_o the_o congruity_n and_o incongruity_n of_o body_n as_o to_o touch_v i_o find_v also_o the_o like_a congruity_n and_o incongruity_n if_o i_o may_v so_o speak_v as_o to_o the_o transcursion_n of_o the_o ray_n of_o light_n for_o in_o this_o regard_n water_n not_o now_o to_o mention_v other_o liquor_n seem_v near_o of_o affinity_n to_o glass_n than_o air_n and_o air_n then_o quicksilver_n for_o a_o oblique_a ray_n out_o of_o glass_n will_v pass_v into_o water_n with_o very_o little_a refraction_n from_o the_o perpendicular_a but_o none_o out_o of_o glass_n into_o air_n except_v a_o direct_a will_v pass_v without_o a_o very_a great_a refraction_n from_o the_o perpendicular_a nay_o any_o oblique_a ray_n under_o 30_o degree_n will_v not_o be_v admit_v into_o the_o air_n at_o all_o but_o reflect_v and_o quicksilver_n will_v neither_o admit_v oblique_a or_o direct_a but_o reflect_v all_o so_o that_o quicksilver_n as_o to_o the_o transmit_v of_o the_o ray_n of_o light_n seem_v to_o be_v of_o a_o quite_o differ_v constitution_n from_o that_o of_o air_n water_n glass_n etc._n etc._n and_o to_o assimilate_v most_o those_o opacous_a and_o strong_a reflect_a body_n of_o metal_n and_o as_o to_o the_o property_n of_o cohesion_n or_o congruity_n it_o seem_v to_o keep_v the_o same_o order_n a_o second_o thing_n which_o be_v hint_v to_o i_o by_o the_o consideration_n of_o the_o include_v fluid_n globular_a form_n cause_v by_o the_o protrusion_n of_o the_o ambient_fw-la heterogeneous_a fluid_n be_v whether_o the_o phaenomena_n of_o gravity_n may_v not_o by_o this_o mean_n be_v explain_v by_o suppose_v the_o globe_n of_o earth_n water_n and_o air_n to_o be_v include_v with_o a_o fluid_a heterogenous_a to_o all_o and_o each_o of_o they_o which_o be_v so_o subtle_a as_o not_o only_o to_o be_v every_o where_o intersperse_v through_o the_o air_n or_o rather_o the_o air_n through_o it_o but_o do_v pervade_v the_o body_n of_o glass_n and_o even_o the_o close_a metal_n by_o which_o mean_v it_o do_v endeavour_v to_o detrude_v all_o earthly_a body_n as_o far_o from_o it_o as_o it_o can_v and_o partly_o thereby_o and_o partly_o by_o other_o of_o its_o property_n of_o which_o i_o may_v some_o other_o time_n give_v a_o full_a account_n move_v they_o towards_o the_o centre_n of_o the_o earth_n now_o that_o there_o be_v some_o such_o fluid_a i_o can_v produce_v many_o experiment_n and_o reason_n that_o do_v seem_v to_o prove_v but_o because_o i_o see_v it_o will_v ask_v some_o time_n and_o room_n to_o set_v they_o down_o and_o explain_v they_o and_o to_o consider_v and_o answer_v all_o the_o objection_n many_o whereof_o i_o foresee_v that_o may_v be_v allege_v against_o it_o and_o because_o i_o
the_o middle_n the_o fast_a it_o be_v move_v and_o therefore_o you_o will_v find_v it_o to_o move_v fast_o in_o e._n than_o in_o d._n and_o in_o d._n than_o in_o c._n neither_o can_v i_o find_v the_o float_a substance_n to_o be_v move_v at_o all_o until_o it_o be_v place_v upon_o some_o part_n of_o the_o superficies_n that_o be_v sensible_o elevate_v above_o the_o height_n of_o the_o middle_a part_n now_o that_o this_o may_v be_v the_o true_a cause_n you_o may_v try_v with_o a_o blow_a bladder_n and_o a_o exact_o roâ—nd_a ball_n upon_o a_o very_a smooth_a table_n for_o if_o the_o ball_n be_v place_v under_o a_o part_n of_o the_o bladder_n w_o ch_n be_v upon_o one_o side_n of_o the_o middle_n of_o its_o pressure_n &_o you_o press_v strong_o against_o the_o bladder_n you_o shall_v find_v the_o ball_n move_v from_o the_o middle_n towards_o the_o side_n have_v therefore_o show_v the_o reason_n of_o the_o motion_n of_o any_o float_n towards_o the_o side_n the_o reason_n of_o the_o incursion_n of_o any_o two_o float_a body_n will_v easy_o appear_v for_o the_o rise_n of_o the_o water_n against_o the_o side_n of_o either_o of_o they_o be_v a_o argument_n sufficient_a to_o show_v the_o pressure_n of_o the_o air_n to_o be_v there_o less_o than_o it_o be_v further_o from_o it_o where_o it_o be_v not_o so_o much_o elevate_v and_o therefore_o the_o reason_n of_o the_o motion_n of_o the_o other_o towards_o it_o will_v be_v the_o same_o as_o towards_o the_o side_n of_o the_o glass_n only_o here_o from_o the_o same_o reason_n they_o be_v mutual_o move_v towards_o each_o other_o whereas_o the_o side_n of_o the_o glass_n in_o the_o former_a remain_v fix_v if_o also_o you_o gentle_o fill_v the_o jar_n so_o full_a with_o water_n that_o the_o water_n be_v protuberant_a above_o the_o side_n of_o the_o same_o piece_n of_o cork_n that_o before_o do_v hasten_v towards_o the_o side_n do_v now_o fly_v from_o it_o as_o fast_o towards_o the_o middle_n of_o the_o superficies_n the_o reason_n of_o which_o will_v be_v find_v no_o other_o than_o this_o that_o the_o pressure_n of_o the_o air_n be_v strong_a against_o the_o side_n of_o the_o superficies_n g._n and_o h._n then_o against_o the_o middle_a i._n which_o may_v be_v argue_v from_o its_o be_v much_o low_a than_o the_o middle_n and_o therefore_o the_o consecution_n will_v be_v the_o same_o as_o in_o the_o former_a it_o be_v very_o odd_a to_o one_o that_o consider_v not_o the_o reason_n of_o it_o to_o see_v two_o body_n of_o wood_n to_o approach_v each_o other_o as_o though_o they_o be_v endue_v with_o some_o magnetical_a vigour_n which_o bring_v into_o my_o mind_n what_o i_o former_o try_v with_o a_o piece_n of_o cork_n or_o such_o like_a body_n which_o i_o so_o order_v that_o by_o put_v a_o little_a stick_n into_o the_o same_o water_n one_o part_n of_o the_o say_a cork_n will_v approach_v and_o make_v towards_o the_o stick_n whereas_o another_o will_v discede_fw-la and_o fly_v away_o nay_o it_o will_v have_v a_o kind_n of_o verticity_n so_o as_o that_o if_o the_o aequator_fw-la as_o i_o may_v so_o speak_v of_o the_o cork_n be_v place_v towards_o the_o stick_n if_o let_v alone_o it_o will_v instant_o turn_v its_o appropriate_a pole_n towards_o it_o and_o then_o run_v a_o tilt_n at_o it_o and_o this_o be_v only_o by_o take_v a_o dry_a cork_n and_o wet_v one_o side_n of_o it_o with_o one_o small_a stroke_n for_o by_o this_o mean_n gentle_o put_v it_o upon_o the_o water_n it_o will_v depress_v the_o superficies_n on_o every_o side_n of_o it_o that_o be_v dry_a and_o therefore_o the_o great_a pressure_n of_o the_o air_n be_v near_o those_o side_n cause_v it_o either_o to_o chase_v away_o or_o else_o to_o fly_v off_o from_o any_o other_o float_a body_n whereas_o that_o side_n only_o against_o which_o the_o water_n ascend_v be_v thereby_o able_a to_o attract_v i_o can_v here_o stay_v to_o explain_v the_o reason_n of_o magnetical_a and_o electrical_a attraction_n nor_o the_o reason_n of_o gravity_n or_o magnetical_a direction_n and_o variation_n they_o be_v little_a or_o nothing_o at_o all_o to_o my_o present_a subject_n and_o beside_o will_v afford_v matter_n enough_o to_o fill_v another_o sheet_n when_o i_o have_v leisure_n it_o remain_v only_o that_o i_o shall_v determine_v now_o high_a the_o water_n or_o other_o liquor_n may_v by_o this_o mean_n be_v raise_v in_o a_o small_a pipe_n above_o the_o superficies_n of_o that_o without_o it_o but_o to_o determine_v this_o will_v be_v exceed_o difficult_a unless_o i_o can_v certain_o know_v how_o much_o of_o the_o air_n be_v pressure_n be_v take_v off_o by_o the_o smallness_n of_o such_o and_o such_o a_o pipe_n and_o whether_o it_o may_v be_v whole_o take_v off_o that_o be_v whether_o there_o can_v be_v a_o hole_n or_o poor_a so_o small_a into_o which_o air_n can_v not_o at_o all_o enter_v though_o water_n may_v with_o its_o whole_a force_n for_o be_v there_o such_o it_o be_v manifest_a that_o the_o water_n may_v rise_v in_o it_o to_o some_o five_o or_o six_o and_o thirty_o english_a foot_n high_a i_o know_v not_o whether_o there_o may_v not_o be_v such_o natural_a pipe_n in_o the_o body_n of_o small_a tree_n which_o we_o usual_o call_v their_o pore_n but_o i_o have_v already_o pretergress_v the_o bound_n of_o a_o sheet_n which_o i_o at_o first_o prescribe_v myself_o for_o the_o explication_n of_o this_o phaenomenon_n and_o therefore_o i_o shall_v at_o present_a make_v a_o end_n of_o this_o much_o have_v be_v â—â—id_v in_o the_o 31_o 〈◊〉_d 32_o experiment_n of_o the_o abovementioned_n discourse_v â—f_o the_o air_n &_o 〈◊〉_d more_o copious_o explain_v in_o a_o treatise_n of_o â—he_n same_o honourable_a author_n now_o in_o â—he_n press_n