know_v a_o more_o likely_a hypothesis_n for_o gravity_n which_o i_o can_v make_v out_o by_o experiment_n i_o shall_v at_o present_a proceed_v to_o other_o query_n content_v myself_o to_o have_v here_o only_o give_v a_o hint_n of_o what_o i_o may_v elsewhere_o determine_v a_o three_o query_n than_o be_v whether_o the_o heterogeneity_n of_o the_o ambient_fw-la fluid_fw-la may_v not_o be_v account_v a_o secondary_a cause_n of_o the_o roundness_n or_o globular_a form_n of_o the_o great_a body_n of_o the_o world_n such_o as_o be_v those_o of_o the_o sun_n star_n and_o planet_n the_o substance_n of_o each_o of_o which_o seem_v altogether_o heterogeneous_a to_o the_o circum-ambient_a fluid_a aether_n a_o four_o be_v whether_o the_o globular_a form_n of_o the_o small_a parcel_n of_o matter_n here_o upon_o the_o earth_n as_o that_o of_o fruit_n pebble_n or_o fâ—ints_n &c._n &c._n which_o seem_v to_o have_v be_v a_o liquor_n at_o first_o may_v not_o be_v cause_v by_o the_o heterogeneous_a 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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 two_o liquor_n be_v as_o g._n h._n to_o f._n e._n this_o experiment_n i_o try_v with_o several_a other_o liquor_n and_o particular_o with_o fresh_a water_n and_o salt_n which_o we_o make_v by_o dissolve_v salt_n in_o warm_a water_n which_o two_o though_o they_o be_v nothing_o heterogeneous_a yet_o before_o they_o will_v perfect_o mix_v one_o with_o another_o i_o make_v trial_n of_o the_o experiment_n nay_o let_v the_o tube_n wherein_o i_o try_v the_o experiment_n remain_v for_o many_o day_n i_o observe_v they_o not_o to_o mix_v but_o the_o superficies_n of_o the_o fresh_a be_v rather_o more_o than_o less_o elevate_v above_o that_o of_o the_o salt_n now_o the_o proportion_n of_o the_o gravity_n of_o sea-water_n to_o that_o of_o riverwater_n according_a to_o stevinus_n and_o varenius_n for_o i_o have_v not_o now_o the_o opportunity_n of_o make_v trial_n myself_o be_v as_o 46._o to_o 45._o that_o be_v 46._o ounce_n of_o the_o salt-water_n will_v take_v up_o no_o more_o room_n than_o 45_o of_o the_o fresh_a or_o reciprocal_o 45_o pint_n of_o salt_n water_n weigh_v as_o much_o as_o 46_o of_o fresh_a though_o i_o conceive_v the_o difference_n to_o be_v much_o more_o for_o i_o find_v the_o proportion_n of_o brine_n to_o fresh_a water_n to_o be_v near_o 13_o to_o 12_o suppose_v therefore_o g._n h._n m._n to_o represent_v the_o sea_n and_o f._n i._n the_o height_n of_o the_o mountain_n above_o the_o superficies_n of_o the_o sea_n f._n m._n a_o cavern_n in_o the_o earth_n begin_v at_o the_o bottom_n of_o the_o sea_n and_o terminate_v at_o the_o top_n of_o the_o mountain_n l._n m_o the_o sand_n at_o the_o bottom_n through_o which_o the_o water_n be_v as_o it_o be_v strain_v so_o as_o that_o the_o fresh_a part_n be_v only_o permit_v to_o transude_v and_o the_o saline_n keep_v back_o if_o therefore_o the_o proportion_n of_o g._n m._n to_o f._n m._n be_v as_o 45._o to_o 46._o then_o may_v the_o cylinder_n of_o salt_n water_n g._n m._n make_v the_o cylinder_n of_o fresh_a water_n to_o rise_v as_o high_a as_o e._n and_o to_o run_v over_o at_o n._n i_o can_v here_o stand_v to_o examine_v or_o confute_v their_o opinion_n who_o make_v the_o depth_n of_o the_o sea_n below_o its_o superficies_n to_o be_v no_o more_o perpendicular_o measure_v than_o the_o height_n of_o the_o mountain_n above_o it_o it_o be_v enough_o for_o i_o to_o say_v there_o be_v no_o one_o of_o those_o that_o have_v vent_v it_o have_v experimental_o know_v the_o perpendicular_a of_o either_o nor_o shall_v i_o here_o determine_v whether_o there_o may_v not_o be_v many_o other_o cause_n of_o the_o separation_n of_o the_o fresh_a water_n from_o the_o salt_n as_o perhaps_o some_o part_n of_o the_o earth_n through_o which_o it_o be_v
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 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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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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