will_v appear_v great_a vibration_n of_o the_o water_n in_o the_o upper_a part_n of_o the_o tube_n the_o rise_n and_o the_o fall_a amount_v sometime_o to_o a_o foot_n or_o near_o half_a a_o yard_n but_o these_o grow_v lesser_a and_o lesser_a as_o those_o of_o the_o quicksilver_n in_o the_o torricellian_a experiment_n use_v to_o do_v 4._o one_o may_v use_v a_o ordinary_a pail_n to_o hold_v the_o stagnant_a water_n but_o we_o rather_o employ_v a_o vessel_n of_o earth_n make_v for_o another_o purpose_n somewhat_o slender_a and_o of_o a_o cylindrical_a shape_n because_o in_o a_o narrow_a vessel_n it_o be_v more_o easy_a to_o guess_v by_o the_o rise_n and_o fall_v of_o the_o liquor_n how_o the_o pump_n be_v ply_v and_o to_o perceive_v even_o small_a leak_n 5._o i_o must_v not_o forget_v to_o take_v notice_n that_o though_o the_o new_o name_v gentleman_n come_v to_o i_o when_o they_o have_v see_v the_o experiment_n try_v within_o less_o than_o a_o hour_n after_o the_o time_n i_o have_v look_v upon_o the_o baroscope_n and_o observe_v the_o quicksilver_n to_o stand_v somewhat_o beneath_o 29_o inch_n and_o 3_o eight_o yet_o when_o present_o upon_o their_o return_n i_o consult_v the_o same_o instrument_n again_o the_o mercury_n appear_v to_o be_v sensible_o rise_v be_v somewhat_o though_o but_o very_o little_a above_o 9_o and_o 20_o inch_n and_o 3_o eight_o and_o 5_o or_o 6_o hour_n after_o at_o bedtime_n i_o find_v it_o to_o be_v yet_o more_o considerable_o rise_v which_o may_v keep_v your_o lordship_n from_o wonder_v at_o what_o i_o intimate_v a_o little_a above_o touch_v monsieur_n paschal_n experiment_n as_o well_o as_o touch_v the_o disappointment_n of_o the_o pump-maker_n endeavour_n for_o it_o be_v not_o only_o possible_a that_o as_o i_o have_v elsewhere_o note_v water_n may_v be_v raise_v in_o the_o same_o pump_n though_o we_o suppose_v it_o still_o equal_o staunch_v high_a at_o one_o time_n than_o at_o another_o but_o it_o be_v contingent_a that_o in_o mounseur_fw-fr paschal_n noble_a attempt_n to_o imitate_v the_o torricellian_a experiment_n with_o water_n in_o stead_n of_o quicksilver_n the_o proportion_n betwixt_o the_o height_n of_o those_o two_o liquor_n in_o their_o respective_a tube_n answer_v so_o well_o to_o their_o specific_a gravity_n for_o the_o vary_a weight_n of_o the_o atmosphere_n be_v not_o then_o that_o appear_v know_v or_o consequent_o take_v into_o consideration_n if_o monsieur_n paschal_n have_v try_v the_o torricellian_a experiment_n when_o the_o air_n be_v for_o instance_n very_o heavy_a have_v try_v his_o own_o experiment_n when_o the_o atmosphere_n have_v be_v as_o light_v as_o i_o have_v often_o enough_o observe_v it_o to_o be_v he_o may_v have_v find_v his_o cylinder_n of_o water_n to_o have_v be_v half_a a_o yard_n or_o two_o foot_n short_a than_o the_o former_o measure_a height_n of_o the_o quicksilver_n will_v have_v require_v i_o have_v now_o no_o more_o to_o add_v about_o this_o 15_o the_o experiment_n but_o that_o it_o may_v serve_v for_o a_o sufficient_a confirmation_n of_o what_o i_o note_v in_o another_o treatise_n against_o those_o hydraulical_a &_o pneumatical_a writer_n who_o pretend_v to_o teach_v way_n of_o make_v water_n pass_v by_o inflected_a pipe_n and_o by_o the_o help_n of_o suction_n from_o one_o side_n of_o a_o mountain_n to_o the_o other_o be_v the_o mountain_n never_o so_o high_a for_o if_o the_o water_n be_v to_o ascend_v as_o it_o be_v spontaneous_o above_o 35_o or_o 36_o foot_n a_o suck_v pump_n will_v not_o ordinary_o at_o least_o here_o in_o england_n be_v able_a to_o raise_v it_o and_o now_o i_o speak_v of_o mountain_n it_o will_v not_o be_v altogether_o impertinent_a to_o add_v that_o if_o it_o have_v not_o be_v for_o unseasonable_a weather_n i_o have_v think_v fit_a to_o make_v the_o forego_v 11_o the_o experiment_n of_o elevate_a mercury_n by_o suction_n to_o be_v try_v at_o the_o top_n of_o a_o hill_n not_o far_o from_o the_o place_n i_o then_o be_v at_o for_o by_o what_o have_v be_v already_o deliver_v it_o appear_v that_o we_o may_v have_v estimate_v the_o height_n to_o which_o the_o water_n may_v be_v there_o elevate_v by_o suction_n without_o repeat_v the_o experiment_n with_o a_o thirty_o five_o foot_n tube_n which_o we_o can_v not_o hope_v for_o conveniency_n to_o do_v by_o the_o utmost_a height_n to_o which_o our_o engine_n can_v have_v raise_v mercury_n and_o it_o may_v be_v of_o some_o use_n to_o be_v able_a from_o experiment_n to_o make_v some_o estimate_n for_o it_o can_v scarce_o be_v a_o accurate_a one_o how_o much_a it_o may_v be_v expect_v that_o pump_n shall_v caeteris_fw-la paribus_fw-la loose_a of_o their_o power_n of_o elevate_a water_n by_o suction_n by_o be_v employ_v at_o the_o top_n of_o a_o hill_n in_o stead_n of_o be_v so_o at_o the_o bottom_n or_o on_o a_o plain_n remember_v always_o what_o i_o late_o intimate_v that_o even_o in_o the_o same_o place_n liquor_n will_v be_v bring_v to_o ascend_v by_o suction_n to_o a_o great_a or_o less_o height_n at_o one_o time_n than_o another_o according_a to_o the_o vary_a gravity_n of_o the_o atmosphere_n experiment_n xvi_o about_o the_o bend_n of_o a_o springy_a body_n in_o the_o exhaust_v receiver_n the_o cause_n of_o the_o motion_n of_o restitution_n in_o body_n and_o consequent_o of_o that_o which_o make_v some_o of_o they_o springy_a which_o far_o the_o great_a part_n of_o they_o be_v not_o have_v be_v ingenious_o attempt_v by_o some_o modern_a corpuscularian_o and_o especial_o cartesian_n but_o since_o divers_a learned_a and_o judicious_a man_n do_v still_o look_v upon_o the_o cause_n of_o elasticity_n as_o a_o thing_n that_o need_v to_o be_v yet_o far_o inquire_v into_o and_o because_o i_o be_o not_o myself_o so_o well_o satisfy_v as_o to_o blame_v their_o curiosity_n i_o hold_v it_o not_o unfit_a to_o examine_v by_o the_o help_n of_o our_o engine_n their_o conjecture_n who_o imagine_v that_o the_o air_n may_v have_v a_o great_a stroke_n in_o the_o make_n of_o body_n springy_a and_o this_o i_o the_o rather_o do_v because_o i_o have_v elasticity_n elsewhere_o show_v that_o there_o be_v no_o need_n to_o assert_v that_o in_o all_o body_n that_o have_v it_o the_o elastical_a power_n flow_v immediate_o from_o the_o form_n but_o that_o in_o divers_a of_o they_o it_o depend_v upon_o the_o mechanicanical_a structure_n of_o the_o body_n to_o make_v some_o trial_n therefore_o whether_o the_o air_n have_v any_o great_a interest_n in_o the_o motion_n of_o restitution_n we_o take_v a_o piece_n of_o whalebone_n of_o a_o convenient_a bigness_n and_o length_n and_o have_v fasten_v one_o end_n of_o it_o in_o a_o hole_n make_v in_o a_o thick_a and_o heavy_a trencher_n to_o be_v place_v on_o the_o plate_n of_o the_o engine_n we_o tie_v to_o the_o other_o end_n a_o weight_n whereby_o the_o whalebone_n be_v moderate_o bend_v the_o weight_n reach_v down_o so_o near_o to_o a_o body_n place_v in_o a_o level_a position_n under_o it_o that_o if_o the_o spring_n be_v but_o a_o little_a weaken_a the_o weight_n must_v either_o lean_v upon_o or_o at_o least_o touch_v the_o horizontal_a plain_n or_o if_o on_o the_o other_o side_n the_o spring_n shall_v grow_v sensible_o strong_a it_o may_v be_v easy_o perceive_v by_o the_o distance_n of_o the_o weight_n which_o be_v so_o near_o the_o plain_a that_o a_o little_a increase_n of_o it_o must_v be_v visible_a this_o do_v we_o convey_v these_o thing_n into_o the_o receiver_n and_o order_v those_o that_o pump_v to_o shake_v it_o as_o little_a as_o they_o can_v that_o the_o weight_n may_v not_o knock_v against_o the_o body_n that_o lie_v under_o it_o or_o so_o shake_v it_o as_o to_o hinder_v we_o from_o discern_v whither_o or_o no_o it_o be_v depress_v by_o the_o bare_a withdraw_a of_o the_o air._n and_o when_o the_o air_n have_v be_v well_o pump_v out_o i_o watch_v attentive_o whether_o any_o notable_a change_n in_o the_o distance_n of_o the_o weight_n from_o the_o almost_o contiguous_a plain_n will_v be_v produce_v upon_o its_o be_v let_v in_o again_o for_o the_o weight_n be_v then_o at_o rest_n and_o the_o return_a air_n flow_v in_o much_o more_o speedy_o than_o it_o can_v before_o be_v draw_v out_o i_o think_v this_o the_o likely_a time_n to_o discover_v whether_o the_o absence_n of_o the_o air_n have_v sensible_o alter_v the_o spring_n of_o the_o whalebone_n but_o though_o the_o experiment_n be_v make_v more_o than_o once_o i_o can_v satisfy_v myself_o only_o in_o this_o that_o the_o depression_n or_o elevation_n of_o the_o weight_n that_o be_v due_a to_o the_o true_a and_o mere_a change_n of_o the_o spring_n be_v not_o very_o considerable_a since_o i_o do_v not_o think_v myself_o sure_a that_o i_o perceive_v any_o at_o all_o for_o though_o it_o be_v true_a that_o sometime_o
be_v not_o require_v the_o engine_n shall_v be_v very_o much_o exhaust_v 58._o 59_o experiment_n 18._o about_o a_o easy_a way_n to_o make_v the_o pressure_n of_o the_o air_n sensible_a to_o the_o touch_n of_o those_o that_o doubt_v of_o it_o 59_o with_o a_o caution_n in_o use_v of_o it_o 61_o experiment_n 19_o about_o the_o subsidence_n of_o mercury_n in_o the_o tube_n of_o the_o torricellian_a experiment_n to_o the_o level_n of_o the_o stagnant_a mercury_n 61_o some_o confirmation_n of_o what_o have_v be_v say_v in_o the_o first_o treatise_n of_o the_o physicomechanical_a experiment_n exp._n 17._o 62._o 63_o experiment_n 20._o show_v that_o in_o tubes_n open_a at_o both_o end_n when_o no_o fuga_fw-la vacui_fw-la can_v be_v pretend_v the_o weight_n of_o water_n will_v raise_v quicksilver_n no_o high_o in_o slender_a than_o in_o large_a pipe_n 63_o two_o trial_n one_o with_o tube_n of_o several_a bigness_n open_a at_o both_o end_n 64._o 65._o the_o other_o with_o they_o after_o the_o torricellian_a way_n 65._o 66_o experiment_n 21._o of_o the_o height_n at_o which_o pure_a mercury_n and_o mercury_n amalgame_v with_o tin_n will_v stand_v in_o barometer_n 66_o a_o note_n concern_v the_o inconvenience_n if_o the_o amalgam_n be_v too_o thick_a the_o use_n that_o may_v be_v make_v of_o this_o experiment_n to_o discover_v how_o much_o two_o mix_v body_n penetrate_v one_o another_o as_o also_o to_o further_o illustrate_v that_o the_o height_n of_o the_o liquor_n in_o the_o torricellian_a experiment_n depend_v upon_o the_o aequilibrium_fw-la with_o the_o outward_a air._n 67_o experiment_n 22._o wherein_o be_v propose_v away_o of_o make_v barometer_n that_o may_v be_v transport_v even_o to_o distant_a country_n 68_o the_o figure_n the_o barometer_n be_v to_o be_v of_o the_o way_n of_o fill_v it_o put_v it_o into_o a_o frame_n and_o secure_v it_o from_o the_o harm_n the_o mercury_n its_o self_n may_v do_v in_o the_o transportation_n by_o its_o move_n up_o and_o down_o in_o the_o upper_a empty_a part_n 69._o 70._o etc._n etc._n the_o great_a serviceableness_n of_o this_o instrument_n with_o a_o intimation_n of_o other_o of_o a_o different_a kind_n 74._o 75_o a_o postscript_n advertise_v that_o there_o have_v be_v since_o some_o difference_n find_v betwixt_o a_o ordinary_a baroscope_n and_o these_o travail_a one_o with_o a_o guess_n at_o the_o reason_n of_o it_o and_o that_o for_o all_o this_o the_o portable_a baroscope_n may_v be_v serviceable_a 76._o 77_o experiment_n 23._o confirm_v that_o mercury_n in_o a_o barometer_n will_v be_v keep_v suspend_v high_a at_o the_o top_n than_o at_o the_o bottom_n of_o a_o hill_n on_o which_o occasion_n something_o be_v note_v about_o the_o height_n of_o mountain_n especial_o the_o picinino_n of_o tenariff_n 77_o other_o author_n opinion_n about_o it_o examine_v 80_o a_o more_o moderate_a height_n allow_v than_o that_o assert_v by_o ricciolus_n 81._o 82._o with_o a_o consideration_n to_o be_v have_v in_o the_o measure_n the_o altitude_n of_o mountain_n distant_a from_o the_o sea_n 84_o experiment_n 24._o show_v that_o the_o pressure_n of_o the_o atmosphere_n may_v be_v exercise_v enough_o to_o keep_v up_o the_o mercury_n in_o the_o torricellian_a experiment_n though_o the_o air_n press_v upon_o it_o at_o a_o very_a small_a orifice_n 85_o experiment_n 25._o show_v that_o a_o oblique_a pressure_n of_o the_o atmosphere_n may_v suffice_v to_o keep_v up_o the_o mercury_n at_o the_o wont_a height_n in_o the_o torricellian_a experiment_n and_o that_o the_o spring_n of_o a_o little_a include_v air_n may_v do_v the_o same_o 87_o what_o use_n may_v be_v make_v of_o the_o former_a experiment_n for_o a_o portable_a baroscope_n 88_o 89_o experiment_n 26._o about_o the_o make_n of_o a_o baroscope_n but_o of_o little_a practical_a use_n that_o serve_v but_o at_o certain_a time_n 90_o the_o argument_n it_o afford_v against_o a_o fuga_fw-la vacui_fw-la ib._n experiment_n 27._o about_o the_o ascension_n of_o liquor_n in_o very_o slender_a pipe_n in_o a_o exhaust_v receiver_n 91_o experiment_n 28._o about_o the_o great_a and_o seem_o spontaneous_a ascension_n of_o water_n in_o a_o pipe_n fill_v with_o a_o compact_a body_n who_o particle_n be_v think_v incapable_a of_o imbibe_v it_o 93_o by_o it_o a_o explication_n that_o have_v be_v make_v of_o the_o cause_n of_o filtration_n examine_v a_o probable_a cause_n of_o the_o ascension_n of_o sap_n into_o tree_n hence_o suggest_v a_o attempt_n to_o make_v a_o syphon_n that_o shall_v run_v of_o itself_o without_o suction_n 95._o 96_o experiment_n 29._o of_o the_o seem_o spontaneous_a ascension_n of_o salt_n along_o the_o side_n of_o glass_n with_o a_o conjecture_n at_o the_o cause_n of_o it_o 97_o experiment_n 30._o about_o a_o attempt_n to_o measure_v the_o gravity_n of_o the_o cylinder_n of_o the_o atmosphere_n so_o as_o that_o it_o may_v be_v express_v by_o know_a and_o common_a weight_n 101_o wherein_o also_o the_o specific_a gravity_n of_o mercury_n and_o water_n be_v compare_v 102_o experiment_n 31._o about_o the_o attractive_a virtue_n of_o the_o loadstone_n in_o a_o exhaust_v receiver_n 105_o experiment_n 32._o show_v that_o when_o the_o pressure_n of_o the_o external_n air_n be_v take_v off_o it_o be_v very_o easy_a to_o draw_v up_o the_o sucker_n of_o a_o syringe_n though_o the_o hole_n at_o which_o the_o air_n or_o water_n shall_v succeed_v be_v stop_v 106_o the_o first_o trial_n 107._o the_o 2_o d_o trial_n contain_v a_o variation_n of_o the_o forego_n 109_o experiment_n 33._o about_o the_o open_n of_o a_o syringe_n who_o pipe_n be_v stop_v in_o the_o exhaust_a receiver_n and_o by_o the_o help_n of_o it_o make_v the_o pressure_n of_o the_o air_n lift_v up_o a_o considerable_a weight_n 111_o experiment_n 34._o show_v that_o the_o cause_n of_o the_o ascension_n of_o liquor_n in_o syringe_n be_v to_o be_v derive_v from_o the_o pressure_n of_o the_o air._n 113_o exemplify_v in_o three_o several_a trial_n 113._o 115._o 117_o experiment_n 35._o show_v that_o upon_o the_o pressure_n of_o the_o air_n depend_v the_o stick_n of_o cupping-glass_n to_o the_o fleshy_a part_n they_o be_v apply_v to_o 118_o experiment_n 36._o about_o the_o make_n without_o heat_n a_o cupping-glass_n to_o lift_v up_o a_o great_a weight_n 122_o experiment_n 37._o show_v that_o bellows_o who_o nose_n be_v very_o well_o stop_v will_v open_v of_o themselves_o when_o the_o pressure_n of_o the_o external_a air_n be_v take_v off_o 124_o experiment_n 38._o about_o a_o attempt_n to_o examine_v the_o motion_n and_o sensibility_n of_o the_o cartesian_a materia_fw-la subtilis_fw-la or_o the_o aether_n with_o a_o pair_n of_o bellows_o make_v of_o a_o bladder_n in_o the_o exhaust_a receiver_n 127_o experiment_n 39_o about_o a_o far_a attempt_n to_o prosecute_v the_o inquiry_n propose_v in_o the_o foregoing_a experiment_n 132_o first_o with_o a_o syringe_n and_o a_o feather_n 132._o 133._o etc._n etc._n then_o with_o a_o syringe_n in_o water_n 136_o if_o there_o be_v a_o aether_n what_o kind_n of_o body_n it_o must_v be_v with_o a_o confirmation_n of_o the_o 34_o the_o experiment_n 138_o experiment_n 40._o about_o the_o fall_n in_o the_o exhaust_a receiver_n of_o a_o light_a body_n fit_v to_o have_v its_o motion_n visible_o vary_v by_o a_o small_a resistance_n of_o the_o air._n 139_o a_o design_n mention_v to_o try_v this_o way_n what_o the_o degree_n of_o celerity_n will_v be_v of_o descend_v body_n in_o a_o exhaust_a receiver_n 141_o a_o caution_n give_v concern_v this_o present_a experiment_n ib._n direction_n give_v which_o way_n to_o lengthen_v receiver_n for_o the_o trial_n of_o this_o and_o other_o experiment_n 142_o experiment_n 41._o about_o the_o propagation_n of_o sound_n in_o the_o exhaust_a receiver_n 143_o a_o contrivance_n describe_v necessary_a for_o this_o and_o divers_a experiment_n 144_o the_o trial_n perform_v by_o it_o 145._o 146_o another_o trial_n with_o a_o alarm_n watch_n 146._o 147_o a_o assertion_n of_o mersennus_n examine_v a_o proposal_n of_o his_o show_v to_o be_v unpracticable_a 148._o 149_o a_o mention_n of_o some_o other_o trial_n design_v concern_v sound_n 149._o 150_o experiment_n 42._o about_o the_o break_n of_o a_o glass-drop_n in_o a_o exhaust_v receiver_n 150_o wherein_o a_o hypothesis_n ascribe_v the_o cause_n of_o the_o break_n of_o they_o to_o the_o force_n of_o the_o external_a air_n be_v examine_v ib._n experiment_n 43._o about_o the_o production_n of_o light_n in_o the_o exhaust_a receiver_n 151_o experiment_n 44._o about_o the_o production_n of_o a_o kind_n of_o halo_n and_o colour_n in_o the_o exhaust_v receiver_n 152_o the_o reason_n of_o it_o propose_v with_o a_o suggestion_n that_o the_o same_o cause_n may_v have_v be_v of_o that_o apparition_n of_o light_n mentionea_fw-la in_o the_o former_o publish_a experiment_n 153._o 154_o experiment_n 45._o about_o the_o production_n of_o heat_n by_o attrition_n
of_o the_o good_a spirit_n by_o compose_v that_o passion_n which_o his_o zeal_n against_o the_o idolatry_n of_o the_o king_n of_o israel_n have_v put_v the_o prophet_n into_o it_o make_v he_o capable_a of_o be_v act_v by_o the_o spirit_n of_o prophecy_n for_o cheerfulness_n of_o temper_n be_v one_o of_o the_o disposition_n require_v by_o the_o rabinnical_a jew_n themselves_o for_o fit_v man_n for_o prophecy_n that_o may_v possible_o be_v the_o reason_n why_o the_o scripture_n mention_v instrumental_a music_n as_o receive_v in_o the_o school_n of_o the_o prophet_n â—_o especial_o when_o they_o be_v actual_o prophesy_v as_o it_o shall_v seem_v to_o dispose_v they_o for_o the_o free_a influence_n of_o the_o divine_a spirit_n the_o sing_a hymn_n to_o such_o instrument_n be_v call_v prophesy_v in_o the_o place_n now_o mention_v so_o far_o the_o nature_n of_o the_o spiritual_a worship_n of_o the_o gospel_n be_v from_o supersede_v this_o assistance_n of_o instrumental_a music_n as_o our_o 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instrument_n as_o a_o baroscope_n you_o need_v but_o heat_n a_o pin_n or_o slender_a wire_n red_a hot_a and_o so_o burn_v a_o hole_n through_o the_o stoppel_n and_o this_o expedient_a which_o i_o can_v not_o convenient_o advertise_v your_o lordship_n of_o soon_o may_v be_v of_o use_v when_o a_o travail_a baroscope_n be_v to_o be_v often_o remove_v because_o have_v once_o stop_v the_o whole_a orifice_n well_o it_o be_v far_o more_o easy_a to_o stop_v and_o open_v a_o pin-hole_n accurate_o than_o to_o close_v and_o unstop_v the_o whole_a orifice_n of_o the_o tube_n note_v i_o endeavour_v to_o confirm_v more_o than_o one_o of_o the_o forego_n particular_n by_o this_o one_o experiment_n have_v cause_v a_o portable_a barometer_n to_o be_v make_v with_o the_o short_a leg_n of_o a_o somewhat_o more_o than_o ordinary_a length_n i_o afterward_o cause_v the_o upper_a part_n of_o this_o leg_n to_o be_v draw_v out_o very_o slender_a as_o in_o this_o 25_o the_o experiment_n and_o last_o i_o cause_v the_o same_o short_a leg_n to_o be_v either_o about_o or_o somewhat_o above_o the_o middle_a bend_a downward_o so_o that_o the_o small_a orifice_n of_o the_o slender_a apex_n point_v towards_o the_o ground_n this_o do_v i_o be_v to_o have_v measure_v the_o height_n of_o the_o suspend_v mercury_n but_o not_o have_v a_o fit_a ruler_n at_o hand_n i_o then_o defer_v and_o afterward_o forget_v to_o do_v it_o but_o i_o remember_v that_o neither_o i_o nor_o some_o other_o verse_v in_o such_o experiment_n to_o who_o i_o show_v it_o take_v any_o notice_n that_o the_o mercury_n be_v less_o high_a than_o in_o ordinary_a barometer_n whence_o it_o be_v conclude_v that_o the_o atmosphere_n can_v exercise_v his_o pressure_n not_o only_o at_o a_o very_a small_a orifice_n which_o in_o our_o experiment_n do_v little_a if_o at_o all_o exceed_v a_o pin-hole_n but_o when_o the_o air_n must_v at_o this_o little_a orifice_n press_v upward_o to_o be_v able_a to_o press_v upon_o the_o surface_n of_o the_o stagnant_a mercury_n experiment_n xxvi_o about_o the_o make_n of_o a_o baroscope_n but_o of_o little_a practical_a use_n that_o serve_v but_o at_o certain_a time_n to_o show_v some_o ingenious_a man_n by_o a_o medium_fw-la that_o have_v not_o hitherto_o that_o i_o know_v of_o be_v make_v use_n of_o that_o the_o not_o subside_v of_o quicksilver_n in_o a_o invert_v tube_n that_o be_v a_o little_o short_a than_o 30_o inch_n or_o thereabouts_o do_v not_o proceed_v from_o such_o a_o fuga_fw-la vacui_fw-la as_o the_o school_n ascribe_v to_o nature_n but_o from_o the_o gravity_n of_o the_o external_a air_n i_o devise_v the_o follow_a experiment_n have_v make_v choice_n of_o a_o time_n when_o it_o appear_v by_o a_o good_a baroscope_n which_o i_o have_v frequent_o consult_v for_o that_o purpose_n that_o the_o atmosphere_n be_v considerable_o heavy_a i_o cause_v galspipe_n hermetical_o seal_v at_o one_o end_n and_o in_o length_n about_o 2_o foot_n and_o a_o half_a to_o be_v fill_v with_o quicksilver_n save_o a_o very_a little_a wherein_o some_o drop_n of_o water_n be_v put_v that_o we_o may_v the_o better_o discern_v the_o bubble_n if_o any_o shall_v be_v leave_v after_o the_o inversion_n of_o the_o tube_n into_o a_o open_a glass_n with_o stagnant_a mercury_n in_o it_o have_v by_o this_o mean_n though_o not_o without_o difficulty_n free_v the_o tube_n from_o bubble_n we_o so_o order_v the_o matter_n that_o the_o quicksilver_n and_o the_o little_a water_n that_o be_v about_o it_o fill_v the_o tube_n exact_o without_o leave_v any_o interval_n that_o we_o can_v discern_v at_o the_o top_n and_o yet_o the_o mercurial_a cylinder_n be_v but_o very_o little_o high_o than_o that_o of_o our_o baroscope_n be_v at_o that_o time_n this_o do_v the_o new_o fill_v pipe_n be_v leave_v erect_v in_o a_o quiet_a place_n where_o the_o liquor_n retain_v their_o former_a height_n for_o divers_a day_n but_o though_o a_o ordinary_a school-philosopher_n will_v confident_o have_v attribute_v this_o sustation_n of_o so_o heavy_a a_o body_n to_o nature_n fear_n of_o admit_v a_o vacuum_n yet_o it_o seem_v that_o either_o she_o be_v not_o always_o equal_o subject_a to_o that_o fear_n or_o some_o other_o cause_n of_o the_o phaenomenon_n must_v be_v assign_v for_o when_o a_o pretty_a while_n after_o i_o have_v observe_v by_o the_o baroscope_n that_o the_o atmosphere_n be_v grow_v much_o light_a than_o before_o repair_v to_o my_o short_a tube_n i_o find_v that_o according_a to_o my_o expectation_n the_o quicksilver_n be_v not_o inconsiderable_o subside_v and_o have_v leave_v a_o cavity_n at_o the_o top_n which_o afterward_o grow_v lesser_a according_a as_o the_o atmosphere_n grow_v heavy_a nb._n 1_o the_o tube_n employ_v about_o this_o experiment_n may_v be_v bring_v to_o the_o requisite_a shortness_n either_o by_o wear_v off_o a_o little_a of_o the_o glass_n at_o the_o orifice_n of_o it_o or_o by_o increase_v the_o height_n of_o the_o stagnant_a mercury_n into_o which_o it_o have_v be_v invert_v 2._o when_o the_o quick_a silver_n in_o our_o short_a tube_n be_v much_o subside_v there_o appear_v in_o the_o water_n that_o swim_v upon_o it_o a_o little_a bubble_n about_o the_o bigness_n of_o a_o small_a pin_n head_n but_z consider_v how_o careful_a we_o have_v be_v to_o free_v the_o tube_n from_o bubble_n before_o we_o set_v it_o to_o rest_n it_o may_v very_o well_o be_v that_o this_o so_o small_a a_o bubble_n be_v not_o produce_v till_o after_o the_o subside_v of_o the_o quicksilver_n whereupon_o the_o aerial_a particle_n in_o the_o water_n become_v less_o compress_v than_o before_o not_o to_o mention_v that_o the_o bubble_n such_o as_o it_o be_v appear_v very_o much_o great_a than_o it_o will_v have_v do_v if_o the_o pressure_n of_o the_o atmosphere_n have_v not_o be_v keep_v from_o it_o by_o the_o weight_n of_o the_o subjacent_a pillar_n of_o mercury_n experiment_n xxvii_o about_o the_o ascension_n of_o liquor_n in_o very_o slender_a pipe_n in_o a_o exhaust_v receiver_n what_o i_o relate_v to_o your_o lordship_n in_o the_o 35_o the_o of_o the_o publish_v experiment_n pag._n 138._o about_o the_o seem_o spontaneous_a ascension_n of_o water_n in_o slender_a pipe_n have_v occasion_v the_o make_n of_o many_o trial_n by_o the_o curious_a whereby_o that_o experiment_n have_v be_v not_o a_o little_a diversify_v but_o because_o among_o those_o i_o have_v yet_o hear_v of_o none_o have_v be_v make_v in_o our_o engine_n it_o may_v not_o be_v amiss_o to_o add_v the_o follow_a trial_n which_o may_v be_v of_o use_n in_o the_o examen_fw-la of_o one_o or_o two_o of_o the_o chief_a conjecture_n that_o have_v hitherto_o be_v propose_v about_o the_o cause_n of_o that_o odd_a phaenomenon_fw-mi we_o tinge_v some_o spirit_n of_o wine_n with_o cocheneel_v which_o be_v put_v into_o the_o receiver_n and_o the_o air_n withdraw_v do_v exceed_o bubble_v for_o a_o pretty_a while_n then_o little_a hollow_a pipe_n of_o differ_v size_n be_v put_v into_o it_o the_o red_a liquor_n ascend_v high_a in_o the_o slendere_a than_o the_o other_o but_o upon_o the_o withdraw_n of_o the_o air_n there_o scarce_o appear_v any_o sensible_a difference_n in_o the_o height_n of_o the_o liquor_n nor_o yet_o upon_o the_o let_v it_o in_o again_o afterward_o two_o such_o pipe_n of_o differ_v size_n be_v fasten_v together_o at_o a_o distance_n with_o cement_n be_v let_v down_o into_o the_o same_o spirit_n of_o wine_n when_o the_o receiver_n be_v well_o exhaust_v notwithstanding_o which_o the_o liquor_n ascend_v in_o they_o for_o aught_o we_o can_v plain_o see_v after_o the_o ordinary_a manner_n only_o when_o the_o air_n be_v let_v in_o again_o there_o seem_v to_o be_v some_o little_a and_o but_o very_o little_a rise_v at_o least_o in_o one_o of_o the_o pipe_n in_o this_o trial_n this_o phaenomenon_n be_v note_v that_o though_o there_o appear_v no_o bubble_n at_o all_o in_o the_o vesseled_a spirit_n of_o wine_n notwithstanding_o that_o we_o continue_v to_o pump_v yet_o there_o do_v for_o a_o pretty_a while_n arise_v bubble_n in_o that_o part_n of_o the_o liquor_n that_o be_v get_v into_o the_o slender_a pipe_n which_o i_o guess_v to_o proceed_v from_o the_o sustentation_n in_o part_n of_o the_o spirit_n of_o wine_n make_v by_o the_o inside_n of_o the_o pipe_n whereto_o it_o adhere_v experiment_n xxviii_o about_o the_o great_a and_o seem_o spontaneous_a ascension_n of_o water_n in_o a_o pipe_n fill_v with_o a_o compact_a body_n who_o particle_n be_v think_v incapable_a of_o imbibe_v it_o upon_o occasion_n of_o the_o seem_o spontaneous_a ascension_n of_o water_n in_o slender_a pipe_n of_o glass_n i_o consider_v that_o it_o will_v be_v easy_a by_o another_o way_n to_o make_v it_o rise_v to_o a_o far_o great_a height_n than_o hitherto_o have_v be_v do_v for_o since_o we_o have_v find_v by_o observation_n
that_o caeteris_fw-la paribus_fw-la the_o slenderer_n the_o little_a pipe_n be_v that_o we_o employ_v the_o high_a the_o liquor_n will_v rise_v in_o they_o and_o since_o the_o hydrostaticks_n have_v teach_v we_o that_o often_o time_n even_o in_o very_o crooked_a pipe_n water_n will_v be_v make_v to_o ascend_v by_o the_o same_o way_n of_o raise_v it_o to_o the_o same_o perpendicular_a height_n or_o thereabouts_o as_o in_o straight_o one_o i_o think_v that_o i_o may_v well_o substitute_v a_o powder_n consist_v of_o solid_a corpuscle_n heap_v upon_o one_o another_o and_o include_v in_o a_o glass-cane_n in_o stead_n of_o the_o little_a pipe_n i_o have_v hitherto_o use_v for_o i_o consider_v the_o little_a interval_n that_o will_v necessary_o be_v leave_v between_o these_o differ_o shape_v and_o confuse_o place_v corpuscle_n will_v allow_v passage_n to_o the_o water_n as_o do_v the_o cavity_n of_o the_o little_a pipe_n and_o yet_o will_v in_o many_o place_n be_v straight_a than_o the_o slender_a pipe_n i_o have_v use_v and_o though_o beat_a glass_n or_o fine_a sand_n etc._n etc._n may_v have_v be_v employ_v about_o this_o experiment_n yet_o i_o judge_v it_o far_o more_o convenient_a to_o make_v use_n of_o some_o metalline_a calx_fw-la because_o the_o operation_n of_o the_o fire_n make_v a_o more_o exquisite_a comminution_n of_o solid_a body_n than_o our_o pestle_n be_v wont_a to_o do_v be_v fit_a to_o supply_v we_o with_o exceed_a minute_n grain_n that_o intercept_v proportionable_a cavity_n between_o they_o upon_o this_o consideration_n therefore_o beside_o other_o to_o be_v hereafter_o hint_v i_o take_v a_o strait_a pipe_n of_o glass_n open_a at_o both_o end_n and_o of_o a_o moderate_a wideness_n for_o it_o need_v not_o be_v very_o slender_a and_o have_v tie_v a_o linnen-rag_n to_o one_o end_n of_o it_o that_o the_o water_n may_v have_v free_a passage_n in_o and_o the_o powder_n not_o be_v able_a to_o fall_v out_o we_o careful_o and_o as_o exact_o as_o we_o can_v fill_v the_o cavity_n with_o minium_n which_o be_v lead_v calcine_v without_o addition_n to_o redness_n and_o then_o have_v erect_v the_o tube_n so_o that_o the_o bottom_n of_o it_o rest_v upon_o that_o of_o a_o somewhat_o shallow_a and_o open_a mouth_a glass_n contain_v water_n enough_o to_o swim_v a_o inch_n or_o two_o above_o the_o bottom_n of_o the_o tube_n 1662._o into_o who_o cavity_n it_o do_v as_o i_o expect_v insinuate_v itself_o by_o degree_n as_o appear_v by_o a_o little_a change_n of_o colour_n in_o that_o part_n of_o the_o minium_n which_o it_o reach_v till_o the_o open_a glass_n be_v from_o time_n to_o time_n supply_v with_o fresh_a liquor_n it_o attain_v to_o the_o height_n of_o about_o 30_o inch_n and_o then_o our_o society_n express_v a_o curiosity_n to_o see_v it_o and_o have_v it_o place_v among_o better_a thing_n i_o be_v hinder_v from_o make_v any_o further_a observation_n with_o that_o particular_a glass_n wherefore_o take_v afterward_o another_o tube_n and_o some_o minimum_fw-la careful_o prepare_v i_o prosecute_v the_o experiment_n so_o as_o to_o make_v the_o water_n rise_v in_o the_o pipe_n about_o 40_o inch_n above_o the_o surface_n of_o the_o stagnant_a water_n and_o i_o guess_v it_o have_v rise_v high_a but_o by_o reason_n that_o at_o the_o upper_a part_n of_o the_o minimum_fw-la the_o difference_n of_o colour_n be_v so_o small_a as_o not_o to_o be_v easy_o distinguishable_a with_o certainty_n i_o forbear_v to_o allow_v a_o great_a height_n to_o the_o ascension_n of_o the_o water_n nor_o can_v i_o where_o i_o than_o be_v much_o promote_v the_o experiment_n for_o want_v of_o such_o accommodation_n as_o i_o desire_v but_o about_o the_o experiment_n as_o i_o try_v it_o i_o shall_v take_v notice_n of_o the_o follow_a particular_n i_o try_v some_o other_o powder_n beside_o red_a lead_n as_o beat_a glass_n piece_n of_o fine_a sponge_n putty_n etc._n etc._n but_o do_v not_o find_v any_o of_o they_o do_v so_o well_o which_o success_n be_v yet_o perhaps_o but_o accidental_a and_o therefore_o the_o trial_n may_v be_v repeat_v especial_o with_o putty_n because_o that_o be_v a_o metalline_a calx_fw-la as_o well_o as_o minium_n consist_v of_o very_o small_a grain_n and_o by_o reason_n of_o its_o great_a whiteness_n receive_v a_o great_a change_n of_o colour_n by_o wet_n than_o minium_n do_v in_o which_o especial_o if_o it_o be_v very_o fine_a the_o discolouration_n that_o water_n make_v towards_o the_o upper_a part_n of_o the_o tube_n be_v sometime_o not_o so_o easy_a to_o be_v clear_o discern_v 2._o i_o do_v indeed_o endeavour_v to_o remedy_v this_o inconvenience_n by_o use_v in_o stead_n of_o mere_a water_n tinct_a liquor_n as_o ink_n tincture_n of_o safron_n etc._n etc._n but_o they_o seem_v not_o to_o rise_v near_o so_o high_a as_o water_n alone_o as_o if_o the_o dissolve_v ingredient_n do_v by_o degree_n choke_v the_o pore_n of_o the_o minium_n 3._o to_o have_v the_o grain_n of_o our_o powder_n more_o minute_n and_o the_o small_a interval_n between_o they_o i_o choose_v not_o only_o to_o use_v the_o fine_a sort_n of_o minium_n i_o can_v procure_v but_o also_o to_o sift_v it_o through_o a_o very_a fine_a searce_n and_o to_o put_v it_o but_o by_o little_a and_o little_a into_o the_o tube_n that_o by_o ram_v it_o from_o time_n to_o time_n it_o may_v be_v make_v to_o lie_v the_o close_o which_o expedient_n succeed_v not_o ill_a 4._o it_o seem_v by_o a_o trial_n or_o two_o for_o i_o be_o not_o sure_a the_o observation_n will_v always_o hold_v that_o if_o the_o tube_n be_v very_o slender_a as_o about_o the_o bigness_n of_o a_o swan_n quill_n the_o experiment_n succeed_v not_o well_o 5._o it_o may_v be_v worth_a while_n to_o observe_v in_o what_o time_n the_o water_n ascend_v to_o such_o and_o such_o height_n for_o at_o the_o beginning_n it_o will_v ascend_v much_o fast_o than_o afterward_o and_o sometime_o it_o will_v continue_v rise_v 24_o or_o 30_o hour_n and_o sometime_o perhaps_o much_o long_o 6._o one_o of_o the_o scope_n i_o propose_v to_o myself_o in_o this_o experiment_n be_v to_o discover_v a_o mistake_n in_o the_o explication_n that_o some_o learned_a modern_a writer_n have_v give_v we_o of_o the_o cause_n of_o filtration_n for_o whereas_o they_o teach_v that_o the_o part_n of_o filtre_n that_o touch_v the_o water_n be_v swell_v by_o the_o ingress_n of_o it_o to_o their_o pore_n be_v thereby_o make_v to_o lift_v up_o the_o water_n till_o it_o touch_v the_o superior_a part_n of_o the_o filtre_n that_o be_v almost_o contiguous_a to_o they_o by_o which_o mean_v these_o be_v also_o wet_v and_o swell_v raise_v the_o water_n to_o the_o other_o neighbour_a part_n of_o the_o filtre_n till_o it_o have_v reach_v to_o the_o top_n of_o it_o whence_o it_o be_v own_o gravity_n will_v make_v it_o descend_v but_o in_o our_o case_n we_o have_v a_o filtre_n make_v of_o solid_a metalline_a corpuscle_n where_o it_o will_v be_v very_o hard_a to_o show_v that_o any_o such_o intumescence_n be_v produce_v as_o the_o recite_v explication_n require_v 7._o water_n ascend_v so_o few_o inch_n even_o in_o very_o slender_a pipe_n as_o to_o seem_v much_o to_o favour_v their_o judgement_n who_o dissallow_v the_o conjecture_n late_o entertain_v by_o some_o ingenious_a man_n particular_o m_o r_o h._n about_o the_o raise_n of_o the_o sap_n in_o tree_n after_o the_o like_a manner_n that_o water_n be_v raise_v in_o slender_a pipe_n but_o without_o full_o deliver_v yet_o my_o thought_n of_o that_o speculation_n i_o may_v take_v notice_n that_o in_o the_o last_o trial_n above_o recite_v i_o make_v water_n to_o ascend_v near_o if_o not_o above_o 3_o foot_z ½_o and_o if_o by_o so_o sleight_v a_o expedient_a water_n may_v be_v make_v to_o rise_v as_o high_a as_o be_v necessary_a for_o the_o nutrition_n of_o some_o thousand_o of_o plant_n for_o such_o a_o number_n there_o be_v that_o exceed_v not_o 3_o foot_n 1_o 2_o in_o height_n one_o may_n without_o absurdity_n ask_v why_o it_o be_v not_o possible_a that_o nature_n or_o rather_o the_o most_o wise_a author_n of_o it_o may_v have_v make_v such_o contrivance_n in_o plant_n as_o to_o make_v liquor_n ascend_v in_o they_o to_o the_o top_n of_o the_o tall_a tree_n especial_o since_o beside_o divers_a thing_n that_o we_o may_v already_o suspect_v as_o heat_n and_o something_o equivalent_a to_o well_o place_v valve_n many_o other_o that_o perhaps_o be_v not_o yet_o dream_v of_o may_v probable_o concur_v to_o the_o effect_n 8._o as_o i_o former_o make_v by_o bend_v the_o slender_a pipe_n we_o have_v be_v talk_v of_o short_a syphon_n through_o which_o the_o water_n run_v without_o be_v at_o first_o assist_v by_o suction_n so_o i_o think_v fit_a to_o try_v whether_o i_o can_v not_o in_o large_a pipe_n by_o the_o help_n of_o
minium_n make_v much_o long_a syphon_n but_o though_o when_o the_o orifice_n be_v turn_v upward_o fine_a minium_n be_v ram_v into_o both_o the_o leg_n and_o the_o orifice_n be_v both_o of_o they_o close_v yet_o when_o they_o come_v to_o be_v again_o turn_v downward_o the_o weight_n of_o the_o minium_n will_v somewhere_o or_o other_o and_o for_o the_o most_o part_n at_o or_o near_o the_o flexure_n make_v some_o such_o chink_n or_o discontinuation_n as_o to_o hinder_v the_o far_a progress_n of_o the_o water_n which_o impediment_n though_o i_o judge_v it_o superable_a enough_o especial_o by_o make_v at_o the_o flexure_n a_o little_a pipe_n or_o socket_n by_o which_o both_o leg_n may_v be_v close_o fill_v yet_o for_o want_v of_o accommodation_n and_o leisure_n it_o be_v leave_v unsurmount_v upon_o which_o account_n also_o i_o do_v not_o satisfy_v myself_o about_o the_o success_n of_o some_o former_a trial_n as_o of_o the_o ascension_n of_o water_n into_o piece_n of_o wood_n of_o differ_v sort_n the_o operation_n of_o the_o vicissitude_n of_o the_o sun_n beam_n and_o the_o absence_n of_o they_o upon_o liquor_n ascend_v in_o tube_n fill_v with_o minium_n etc._n etc._n 9_o whether_o the_o pressure_n of_o the_o outward_a air_n be_v the_o cause_n of_o the_o ascension_n of_o liquor_n in_o our_o tube_n furnish_v with_o minium_n be_v a_o problem_n in_o order_n to_o who_o solution_n i_o can_v acquaint_v your_o lordship_n with_o a_o contrivance_n wherewith_o to_o make_v some_o trial_n in_o our_o engine_n but_o since_o it_o can_v scarce_o be_v well_o describe_v without_o many_o word_n unless_o you_o express_v a_o particular_a curiosity_n to_o know_v it_o i_o shall_v not_o trouble_v you_o with_o it_o and_o the_o rather_o because_o the_o best_a way_n i_o know_v of_o examine_v this_o difficulty_n belong_v to_o the_o 2_o d_o part_n of_o this_o continuation_n where_o mention_n be_v make_v of_o a_o attempt_n about_o it_o which_o do_v not_o i_o confess_v displease_v i_o experiment_n xxix_o of_o the_o seem_o spontaneous_a ascension_n of_o salt_n along_o the_o side_n of_o glass_n with_o a_o conjecture_n at_o the_o cause_n of_o it_o to_o the_o same_o cause_n or_o the_o like_a with_o that_o of_o the_o ascension_n of_o water_n in_o slender_a pipe_n may_v be_v probable_o refer_v a_o odd_a phaenomenon_n which_o though_o i_o remember_v not_o to_o have_v be_v mention_v by_o any_o chemical_a or_o other_o writer_n i_o have_v not_o unfrequent_o observe_v as_o well_o by_o chance_n as_o in_o trial_n purposely_o make_v to_o satisfy_v myself_o and_o other_o about_o the_o truth_n of_o it_o the_o phaenomenon_n in_o short_a be_v this_o that_o have_v in_o wide-mouthed_a glass_n which_o shall_v not_o be_v very_o deep_a expose_v to_o the_o air_n a_o strong_a solution_n of_o common_a sea-salt_n or_o of_o vitriol_n which_o reach_v not_o by_o some_o inch_n to_o the_o top_n of_o the_o glass_n and_o have_v suffer_v much_o of_o the_o aqueous_a part_n to_o exhale_v away_o very_o slow_o the_o coagulate_v salt_n will_v at_o length_n appear_v to_o have_v line_v the_o inside_n of_o the_o glass_n and_o to_o have_v ascend_v much_o high_o not_o only_o than_o the_o place_n where_o the_o surface_n of_o the_o remain_a water_n then_o rest_v at_o but_o than_o the_o place_n to_o which_o the_o liquor_n reach_v when_o it_o be_v first_o pour_v in_o and_o if_o the_o experiment_n be_v continue_v long_o enough_o i_o sometime_o observe_v this_o ascension_n of_o the_o salt_n to_o amount_v to_o some_o inch_n and_o that_o the_o salt_n do_v not_o only_o line_v the_o inside_n of_o the_o glass_n but_o get_v over_o the_o brim_n of_o it_o cover_v the_o outside_n of_o it_o with_o a_o saline_n crust_n which_o make_v they_o that_o see_v how_o little_a liquor_n remain_v in_o the_o glass_n admire_v how_o it_o can_v possible_o get_v thither_o and_o though_o i_o have_v mention_v but_o the_o solution_n of_o vitriol_n and_o sea-salt_n because_o they_o be_v much_o easy_a than_o other_o to_o be_v procure_v and_o yet_o the_o experiment_n succeed_v better_a in_o they_o than_o in_o some_o other_o far_o less_o parable_n salt_n yet_o they_o be_v not_o the_o only_a one_o by_o who_o solution_n the_o recite_v phaenomenon_n may_v be_v exhibit_v as_o for_o the_o cause_n of_o this_o odd_a effect_n though_o i_o shall_v not_o propose_v any_o thing_n about_o it_o with_o confidence_n till_o i_o have_v further_o inquire_v into_o it_o and_o especial_o till_o i_o have_v try_v whether_o the_o phaenomenon_n may_v be_v produce_v in_o a_o exhaust_v receiver_n yet_o by_o what_o i_o have_v hitherto_o observe_v i_o be_o incline_v to_o conjecture_v that_o it_o may_v be_v refer_v to_o such_o a_o cause_n as_o that_o of_o the_o ascension_n of_o liquor_n in_o pipe_n after_o some_o such_o manner_n as_o this_o first_o i_o observe_v that_o in_o water_n and_o aqueous_a liquor_n that_o part_n of_o the_o surface_n which_o be_v next_o the_o side_n of_o the_o glass_n be_v whatever_o the_o reason_n of_o it_o be_v sensible_o more_o elevate_v than_o the_o rest_n of_o the_o superficies_n and_o if_o very_a little_a clipping_n of_o straw_n or_o other_o such_o minute_n and_o light_a body_n float_v upon_o the_o water_n chance_v to_o approach_v near_o enough_o to_o the_o side_n of_o the_o glass_n they_o will_v be_v apt_a which_o one_o will_v not_o expect_v to_o run_v up_o as_o it_o be_v this_o ascent_n of_o water_n and_o rest_n against_o the_o side_n of_o the_o glass_n next_o we_o may_v take_v notice_n with_o the_o salt-boylers_a and_o chemist_n that_o sea-salt_n be_v usual_o wont_a to_o coagulate_v at_o the_o top_n of_o the_o water_n in_o small_a and_o oblong_a corpuscle_n so_o that_o as_o to_o these_o it_o be_v easy_a to_o conceive_v to_o they_o that_o have_v consider_v the_o first_o observation_n how_o number_n of_o they_o may_v fasten_v themselves_o round_o about_o to_o the_o inside_n of_o the_o glass_n and_o beside_o sea-salt_n i_o have_v find_v by_o trial_n divers_a other_o if_o their_o solution_n be_v slow_o enough_o evaporate_v that_o will_v whilst_o yet_o there_o remain_v a_o good_a proportion_n of_o liquor_n afford_v saline_n concretion_n at_o the_o top_n of_o the_o water_n and_o the_o fasten_n of_o saline_n particle_n to_o the_o side_n of_o the_o glass_n may_v perhaps_o be_v promote_v by_o the_o coldness_n that_o may_v be_v communicate_v to_o the_o corpuscle_n contiguous_a to_o the_o glass_n by_o reason_n of_o the_o coldness_n which_o the_o glass_n may_v be_v suspect_v to_o have_v upon_o the_o score_n of_o its_o density_n in_o comparison_n of_o water_n but_o to_o proceed_v i_o consider_v that_o by_o the_o evaporation_n of_o the_o aqueous_a part_n of_o the_o solution_n the_o surface_n of_o the_o remain_a liquor_n must_v necessary_o subside_o and_o those_o saline_n particle_n that_o be_v contiguous_a to_o the_o inside_n of_o the_o glass_n and_o the_o more_o elevate_a part_n of_o the_o water_n have_v no_o long_o enough_o of_o liquor_n to_o keep_v they_o dissolve_v will_v be_v apt_a to_o remain_v stick_v to_o the_o side_n of_o the_o glass_n and_o upon_o the_o least_o far_a evaporation_n of_o the_o water_n will_v be_v a_o little_a high_o than_o the_o great_a part_n of_o the_o superficies_n of_o that_o liquor_n by_o which_o mean_v it_o will_v come_v to_o pass_v that_o by_o reason_n of_o the_o little_a inequality_n that_o will_v be_v on_o the_o internal_a surface_n of_o the_o adhere_a corpuscle_n of_o the_o salt_n and_o perhaps_o also_o on_o the_o internal_a superficies_n of_o the_o glass_n there_o will_v be_v intercept_v between_o the_o salt_n and_o the_o glass_n little_a cavity_n into_o which_o the_o water_n contiguous_a to_o the_o bottom_n will_v ascend_v or_o be_v impel_v upon_o such_o a_o account_n as_o that_o whereon_o it_o be_v raise_v in_o slender_a pipe_n and_o when_o the_o liquor_n be_v thus_o get_v to_o the_o top_n of_o the_o salt_n and_o come_v to_o be_v expose_v to_o the_o air_n the_o saline_n part_n may_v by_o the_o evaporation_n of_o the_o aqueous_a be_v bring_v to_o coagulate_v there_o and_o consequent_o to_o increase_v the_o height_n of_o the_o saline_n film_n if_o i_o may_v so_o call_v it_o which_o by_o the_o like_a mean_n may_v be_v at_o length_n bring_v to_o reach_v to_o the_o very_a top_n of_o the_o glass_n whence_o it_o may_v easy_o be_v bring_v over_o to_o the_o outside_n of_o the_o vessel_n where_o the_o natural_a weight_n of_o the_o solution_n will_v facilitate_v its_o progress_n downward_o and_o the_o skin_n of_o salt_n together_o with_o the_o contiguous_a surface_n of_o the_o glass_n may_v at_o length_n constitute_v a_o kind_n of_o syphon_n to_o this_o explication_n it_o agree_v well_o that_o i_o have_v usual_o observe_v the_o saline_n film_n hitherto_o mention_v to_o be_v with_o great_a ease_n separable_a from_o the_o glass_n in_o large_a fleak_n
such_o barrel_n but_o with_o a_o fouresquare_a bit_n as_o they_o call_v it_o which_o leave_v the_o cavity_n too_o angular_a or_o too_o imperfect_o round_a whereas_o if_o a_o hexahedrical_a bit_n be_v employ_v it_o will_v as_o he_o affirm_v make_v the_o cavity_n almost_o as_o cylindrical_a as_o can_v be_v reasonable_o desire_v i_o say_v nothing_o here_o of_o make_v use_n for_o our_o purpose_n of_o a_o trunk_n as_o they_o call_v a_o hollow_a cylinder_n of_o wood_n because_o i_o elsewhere_o show_v that_o wood_n at_o least_o such_o as_o the_o trunk_n to_o shoot_v pellet_n with_o be_v wont_a to_o be_v make_v of_o be_v not_o of_o a_o texture_n close_a enough_o for_o such_o a_o use_n 3._o because_o in_o cylinder_n of_o mercury_n 30_o inch_n be_v a_o height_n which_o the_o atmosphere_n be_v seldom_o heavy_a enough_o to_o be_v able_a to_o counterpoise_v and_o because_o 29_o inch_n be_v somewhat_o near_o the_o middle_n between_o the_o great_a and_o the_o least_o height_n at_o which_o i_o have_v observe_v the_o mercury_n at_o differ_v time_n to_o stand_v in_o good_a barometer_n your_o lordship_n may_v if_o you_o please_v abate_v a_o 30_o the_o part_n of_o the_o weight_n assign_v above_o to_o a_o mercurial_a cylinder_n of_o 30_o inch_n though_o i_o take_v 29_o and_o ¼_n or_o thereabouts_o to_o be_v somewhat_o a_o more_o usual_a height_n of_o the_o mercury_n than_o precise_o nine_o and_o twenty_o 4._o the_o weight_n of_o a_o mercurial_a cylinder_n in_o a_o aequilibrium_fw-la with_o the_o atmosphere_n and_o of_o one_o inch_n in_o diameter_n be_v thus_o settle_v we_o may_v by_o the_o help_n of_o the_o doctrine_n of_o proportion_n and_o a_o few_o proposition_n especial_o the_o 14_o the_o of_o the_o 12_o the_o book_n of_o euclides_n element_n easy_o enough_o calculate_v the_o weight_n of_o a_o cylinder_n of_o mercury_n of_o another_o diameter_n and_o consequent_o the_o force_n of_o the_o pressure_n of_o a_o atmospherical_a pillar_n of_o the_o same_o diameter_n for_o since_o according_a to_o the_o forename_a 14_o the_o proposition_n of_o the_o 12_o the_o cylinder_v of_o equal_a base_n be_v to_o one_o another_o as_o their_o height_n and_o since_o by_o the_o 2_o d_o proposition_n of_o the_o same_o 12._o element_n circle_n such_o as_o be_v the_o base_n of_o cylinder_n be_v to_o one_o another_o as_o the_o square_n of_o their_o diameter_n and_o since_o last_o we_o suppose_v that_o mercury_n be_v a_o homogeneous_a body_n at_o least_o as_o to_o sense_n the_o mercurial_a cylinder_n will_v have_v the_o same_o proportion_n to_o each_o other_o in_o weight_n that_o they_o have_v in_o bulk_n since_o i_o say_v these_o thing_n be_v so_o if_o for_o instance_n we_o desire_v to_o know_v what_o will_v be_v the_o weight_n of_o a_o cylinder_n of_o 30_o inch_n high_a who_o diameter_n be_v two_o inch_n the_o rule_n will_v be_v this_o as_o the_o square_n of_o the_o diameter_n of_o the_o standard_n cylinder_n as_o i_o call_v that_o who_o weight_n be_v already_o know_v be_v to_o the_o square_n of_o the_o diameter_n of_o the_o cylinder_n propose_v so_o will_v the_o bulk_n of_o the_o former_a cylinder_n be_n to_o that_o of_o the_o late_a and_o the_o weight_n of_o that_o to_o the_o weight_n of_o this_o according_a to_o which_o rule_n the_o square_a of_o 1_o inch_n which_o be_v the_o diameter_n of_o the_o standard_n cylinder_n be_v but_o 1_o whereby_o your_o lordship_n may_v perceive_v how_o much_o the_o measure_n i_o pitch_v on_o facilitate_v computation_n and_o the_o square_a of_o 2_o which_o be_v the_o diameter_n of_o the_o propose_v cylinder_n being_z 4_o the_o bulk_n or_o solid_a content_n of_o this_o late_a cylinder_n and_o consequent_o its_o weight_n will_v be_v 4_o time_n as_o great_a as_o those_o of_o the_o standard_n cylinder_n and_o so_o since_o the_o lesser_a have_v be_v already_o suppose_v to_o weigh_v 11_o 8l_o haberdupoise_n the_o mercurial_a cylinder_n of_o two_o inch_n in_o diameter_n will_v weigh_v 47_o 2l_o of_o the_o same_o weight_n experiment_n xxxi_o about_o the_o attractive_a virtue_n of_o the_o loadstone_n in_o a_o exhaust_v receiver_n some_o learned_a modern_a philosopher_n that_o have_v attempt_v to_o explicate_v the_o cause_n and_o manner_n of_o magnetical_a attraction_n or_o coition_n give_v such_o a_o account_n of_o it_o as_o suppose_n that_o the_o air_n between_o the_o two_o magnetical_a body_n be_v drive_v away_o by_o their_o effluvium_n from_o between_o they_o press_v they_o on_o the_o part_n opposite_a to_o those_o where_o the_o contact_n be_v to_o be_v make_v and_o upon_o some_o such_o score_n for_o i_o must_v not_o now_o stay_v to_o deliver_v their_o theory_n circumstantial_o the_o air_n be_v suppose_v to_o contribute_v very_o much_o to_o the_o attraction_n and_o sustentation_n of_o the_o iron_n by_o the_o loadstone_n wherefore_o partly_o to_o examine_v this_o opinion_n and_o partly_o for_o some_o other_o purpose_v not_o necessary_a now_o to_o be_v mention_v we_o think_v fit_a to_o make_v the_o 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a_o good_a deal_n long_o than_o a_o ordinary_o shape_v cup_v glass_n of_o that_o breadth_n will_v have_v be_v that_o there_o may_v be_v the_o more_o room_n for_o the_o flame_n to_o burn_v in_o it_o and_o rarify_v the_o air._n we_o also_o provide_v a_o receiver_n shape_v almost_o like_o a_o pear_n this_o receiver_n be_v open_a at_o both_o end_n at_o the_o sharp_a whereof_o there_o be_v but_o a_o small_a orifice_n but_o at_o the_o obtuse_a end_n there_o rise_v up_o a_o short_a neck_n who_o orifice_n be_v wide_a enough_o to_o admit_v with_o ease_n the_o new_o mention_v cup_v glass_n without_o touch_v the_o side_n of_o it_o and_o we_o be_v not_o willing_a it_o shall_v be_v much_o large_a lest_o it_o shall_v not_o be_v so_o exact_o cover_v by_o the_o palm_n of_o the_o hand_n that_o shall_v be_v lay_v upon_o it_o and_o lest_o also_o the_o hand_n shall_v be_v break_v or_o hurt_v by_o the_o too_o great_a weight_n of_o the_o atmosphere_n when_o the_o include_v air_n shall_v be_v withdraw_v 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this_o turning-key_n and_o the_o other_o to_o the_o uppermost_a marble_n and_o which_o string_n pass_v through_o the_o crank_n or_o hook_n belong_v to_o the_o brass-cove_a we_o do_v i_o say_v by_o the_o help_n of_o this_o string_n and_o by_o turn_v round_o the_o key_n draw_v up_o the_o superior_a marble_n and_o by_o reason_n of_o their_o coherence_n the_o lowermost_a also_o together_o with_o the_o weight_n that_o hang_v at_o it_o by_o which_o mean_v be_v sure_a that_o the_o two_o marble_n stick_v close_o together_o we_o begin_v to_o pump_v out_o the_o air_n that_o keep_v they_o coherent_a and_o after_o a_o while_n the_o air_n be_v pretty_a well_o withdraw_v the_o marble_n fall_v asunder_o but_o we_o have_v so_o order_v the_o matter_n that_o the_o lowermost_a can_v fall_v but_o a_o little_a way_n beneath_o the_o other_o we_o be_v able_a by_o incline_v and_o shake_v the_o engine_n to_o place_v they_o one_o upon_o another_o again_o and_o then_o let_v in_o the_o air_n somewhat_o hasty_o 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