Selected quad for the lemma: cause_n

Word A Word B Word C Word D Occurrence Frequency Band MI MI Band Prominent
cause_n air_n cold_a water_n 1,470 5 6.6658 4 false
View all documents for the selected quad

Text snippets containing the quad

ID Title Author Corrected Date of Publication (TCP Date of Publication) STC Words Pages
A42822 Plus ultra, or, The progress and advancement of knowledge since the days of Aristotle in an account of some of the most remarkable late improvements of practical, useful learning, to encourage philosophical endeavours : occasioned by a conference with one of the notional way / by Jos. Glanvill. Glanvill, Joseph, 1636-1680. 1668 (1668) Wing G820; ESTC R14223 65,458 192

There are 3 snippets containing the selected quad. | View original text

concern_v the_o different_a part_n and_o redintegration_n of_o salt-petre_a whence_o he_o deduce_v that_o motion_n figure_n and_o disposition_n of_o part_n may_v suffice_v to_o produce_v all_o the_o secondary_a affection_n of_o body_n and_o consequent_o that_o there_o be_v no_o need_n of_o the_o substantial_a form_n and_o quality_n of_o the_o school_n to_o this_o he_o add_v a_o close_a history_n of_o fluidity_n and_o firmness_n which_o tend_v mighty_o to_o the_o elucidating_a those_o useful_a doctrine_n 4._o in_o his_o sceptical_a chemist_n he_o caution_n against_o the_o sit_v down_o and_o acquiesce_v in_o chemical_a and_o peripatetical_a theory_n which_o many_o do_v to_o the_o great_a hindrance_n of_o the_o growth_n and_o improvement_n of_o knowledge_n he_o therefore_o advise_v a_o more_o wary_a consideration_n and_o examen_fw-la of_o those_o doctrine_n before_o they_o be_v subscribe_v and_o for_o that_o purpose_n he_o assist_v they_o with_o many_o very_a considerable_a observation_n and_o experiment_n 5._o in_o his_o vsefulness_n of_o experimental_a philosophy_n he_o make_v it_o appear_v how_o much_o that_o way_n tend_v to_o the_o advance_v of_o the_o power_n and_o empire_n of_o man_n over_o the_o creature_n and_o the_o universal_a benefit_n of_o the_o world_n confirm_v and_o illustrate_v his_o discourse_n with_o innumerable_a new_a and_o useful_a discovery_n 6._o in_o his_o history_n of_o cold_a he_o have_v to_o wonder_v cultivate_v that_o barren_a subject_n and_o improve_v it_o as_o be_v note_v by_o the_o philosophical_a transaction_n by_o near_o 200_o choice_a experiment_n and_o observation_n he_o have_v there_o give_v a_o account_n of_o the_o defectiveness_n of_o common_a weather-glass_n the_o advantage_n of_o the_o new_a hermetical_a thermometer_n and_o a_o inquiry_n concern_v the_o cause_n of_o the_o condensation_n of_o the_o air_n and_o ascent_n of_o water_n by_o cold_a in_o the_o ordinary_a weather-wisers_a all_o which_o afford_v valuable_a consideration_n of_o light_n and_o use_v but_o these_o be_v only_a preliminary_n the_o main_a discourse_n present_v we_o with_o a_o account_n what_o body_n be_v capable_a of_o freeze_v other_o and_o what_o of_o be_v freeze_v the_o way_n to_o estimate_v the_o degree_n of_o coldness_n how_o to_o measure_v the_o intenseness_n of_o cold_a produce_v by_o art_n beyond_o that_o employ_v in_o ordinary_a freeze_a in_o what_o proportion_n water_n will_v be_v make_v to_o shrink_v by_o snow_n and_o salt_n how_o to_o measure_v the_o change_n produce_v in_o water_n between_o the_o great_a heat_n of_o summer_n the_o first_o degree_n of_o winter-cold_a and_o the_o high_a of_o art_n how_o to_o discover_v the_o differ_a degree_n of_o coldness_n in_o different_a region_n a_o way_n of_o freeze_a without_o danger_n to_o the_o vessel_n what_o may_v be_v the_o effect_n of_o cold_a as_o to_o the_o preserve_n or_o destroy_v the_o texture_n of_o body_n whether_o specific_a virtue_n of_o plant_n be_v lose_v through_o congelation_n and_o then_o thaw_v whether_o electrical_a and_o magnetic_a virtue_n be_v alter_v by_o cold._n the_o expansion_n and_o contraction_n of_o body_n by_o freeze_a how_o they_o be_v cause_v and_o how_o their_o quantity_n be_v to_o be_v measure_v the_o strength_n of_o the_o expansion_n of_o water_n freeze_a and_o a_o inquiry_n into_o the_o cause_n of_o that_o prodigious_a force_n the_o sphere_n of_o activity_n of_o cold._n how_o far_o the_o frost_n descend_v in_o earth_n and_o water_n a_o experiment_n show_v whether_o cold_a can_v act_v through_o a_o hot_a medium_n a_o way_n of_o account_v the_o solidity_n of_o ice_n and_o the_o strength_n of_o the_o adhesion_n of_o its_o part_n what_o liquor_n be_v its_o quick_a dissolvent_n a_o experiment_n of_o heat_n a_o cold_a liquor_n with_o ice_n these_o and_o many_o more_o such_o instructive_a and_o useful_a thing_n be_v contain_v in_o that_o excellent_a discourse_n to_o which_o be_v annex_v a_o very_a ingenious_a examination_n and_o disproof_n of_o the_o common_a obscure_a doctrine_n of_o antiperistasis_n and_o mr._n hobbs_n his_o notion_n of_o cold._n 7._o in_o his_o experimental_a history_n of_o colour_n he_o have_v lay_v a_o foundation_n in_o 150_o experiment_n at_o least_o for_o ground_a theory_n about_o these_o matter_n he_o have_v show_v the_o grand_a mistake_n of_o the_o common_a belief_n that_o colour_n inhere_o in_o their_o object_n and_o prove_v they_o depend_v upon_o disposition_n of_o the_o external_a part_n and_o the_o more_o inward_a texture_n of_o body_n he_o have_v state_v and_o explain_v wherein_o the_o disparity_n consist_v between_o the_o real_a and_o exphatical_a explicate_v the_o nature_n of_o whiteness_n and_o blackness_n rectify_v some_o chemical_a principle_n compound_v colour_n by_o traject_v the_o solar_a beam_n through_o tinged_a glass_n show_v how_o by_o certain_a tincture_n it_o may_v be_v know_v whether_o any_o salt_n be_v acid_a or_o sulphureous_a have_v prove_v there_o be_v no_o necessity_n of_o the_o peripatetic_a form_n for_o the_o production_n of_o colour_n by_o make_v green_a by_o nine_o kind_n of_o mixture_n compound_v colour_n real_a and_o fantastical_a turn_v the_o blue_n of_o violet_n by_o acid_a salt_n into_o a_o red_a and_o by_o the_o alcalizate_n into_o a_o green_a and_o perform_v many_o other_o extraordinary_a thing_n on_o this_o subject_a for_o the_o advantage_n of_o knowledge_n and_o the_o use_n of_o life_n 8._o in_o his_o hydrostatical_a paradox_n he_o show_v that_o the_o low_a part_n of_o fluids_n be_v press_v by_o the_o upper_a that_o a_o light_a may_v gravitate_fw-la upon_o one_o that_o be_v more_o ponderous_a that_o if_o a_o body_n contiguous_a to_o it_o be_v low_a than_o the_o high_a level_n of_o the_o water_n the_o low_a end_n o●_n the_o body_n will_v be_v press_v upward_o by_o the_o water_n beneath_o that_o the_o weight_n of_o a_o external_a fluid_n suffice_v to_o raise_v the_o water_n in_o pump_n that_o the_o pressure_n of_o a_o external_a fluid_n be_v able_a to_o keep_v a_o heterogeneous_a liquor_n suspend_v at_o the_o same_o height_n in_o several_a pipe_n though_o they_o be_v of_o different_a diameter_n that_o a_o body_n under_o water_n that_o have_v its_o upper_a surface_n parallel_v to_o the_o horizon_n the_o direct_a pressure_n it_o sustain_v be_v no_o more_o than_o that_o of_o a_o column_n of_o water_n which_o have_v the_o mention_a horizontal_n superficies_n for_o its_o basis._n and_o if_o the_o incumbent_a water_n be_v contain_v in_o pipe_n open_a at_o both_o end_n the_o pressure_n be_v to_o be_v estimate_v by_o the_o weight_n of_o a_o pillar_n of_o water_n who_o basis_n be_v equal_a to_o the_o low_a orifice_n of_o the_o pipe_n paralle_n to_o the_o horizon_n and_o its_o height_n equal_a to_o a_o perpendicular_a reach_v to_o the_o top_n of_o the_o water_n though_o the_o pipe_n be_v much_o incline_v irregular_o shape_v and_o in_o some_o part_v broad_a than_o the_o orifice_n that_o a_o body_n in_o a_o fluid_fw-la sustain_v a_o lateral_a pressure_n from_o it_o which_o increase_v in_o proportion_n to_o the_o depth_n of_o the_o immersed_a body_n in_o the_o fluid_fw-la that_o water_n may_v be_v make_v to_o depress_v a_o body_n light_a than_o itself_o that_o a_o parcel_n of_o oil_n light_a than_o water_n may_v be_v keep_v from_o ascend_v in_o it_o that_o the_o cause_n of_o the_o ascension_n of_o water_n in_o syphon_n may_v be_v explain_v without_o the_o notion_n of_o abhorrence_n of_o a_o vacuum_n that_o the_o heavy_a body_n know_v will_v not_o sink_v of_o itself_o without_o the_o assistance_n of_o the_o weight_n of_o the_o water_n upon_o it_o when_o it_o be_v at_o a_o depth_n great_a than_o twenty_o time_n its_o own_o thickness_n though_o it_o will_v near_o the_o surface_n this_o be_v the_o sum_n of_o the_o general_a content_n of_o that_o discourse_n which_o contain_v thing_n very_o useful_a to_o be_v know_v for_o the_o advantage_n of_o navigation_n saltwork_n chemistry_n and_o other_o practical_a purpose_n 9_o in_o his_o book_n of_o the_o origine_fw-la of_o form_n and_o qvality_n he_o deliver_v the_o mind_n of_o man_n from_o the_o imaginary_a and_o useless_a notion_n of_o the_o school_n about_o they_o which_o have_v no_o foundation_n in_o the_o nature_n of_o thing_n nor_o do_v any_o way_n promote_v knowledge_n or_o help_v mankind_n but_o very_o much_o disserve_v those_o great_a interest_n by_o set_v the_o understanding_n at_o rest_n in_o general_a obscurity_n or_o employ_v it_o in_o airy_a nicety_n and_o dispute_n and_o so_o hinder_v its_o pursuit_n of_o particular_a cause_n and_o experimental_a reality_n in_o this_o treatise_n he_o lay_v the_o foundation_n and_o deliver_v the_o principle_n of_o the_o mechanic_n philosophy_n which_o he_o strengthen_v and_o illustrate_v by_o several_a very_o pleasant_a and_o instructive_a experiment_n he_o show_v that_o the_o most_o admirable_a thing_n which_o have_v be_v take_v for_o the_o effect_n of_o substantial_a form_n and_o be_v use_v as_o proof_n of_o
of_o water_n and_o compress_v by_o the_o incumbent_a atmosphere_n even_o in_o those_o close_a retreat_n what_o operation_n the_o exsuction_n of_o the_o air_n have_v on_o other_o liquor_n as_o oil_n wine_n spirit_n of_o vinegar_n milk_n egg_n spirit_n of_o urine_n solution_n of_o tartar_n and_o spirit_n of_o wine_n the_o gravity_n and_o expansion_n of_o the_o air_n under_o water_n the_o interest_n the_o air_n have_v in_o the_o vibration_n of_o pendulum_n and_o what_o it_o have_v to_o do_v in_o the_o propagation_n of_o sound_n that_o fume_n and_o vapour_n ascend_v by_o reason_n of_o the_o gravity_n of_o the_o ambient_fw-la and_o not_o from_o their_o own_o positive_a levity_n the_o nature_n of_o suction_n the_o cause_n of_o filtration_n and_o the_o rise_n of_o water_n in_o siphons_n the_o nature_n of_o respiration_n and_o the_o lung_n illustrate_v by_o trial_n make_v on_o several_a kind_n of_o animal_n and_o the_o interest_n the_o air_n have_v in_o the_o operation_n of_o corrosive_a liquor_n these_o and_o many_o more_o such_o like_a beneficial_a observation_n and_o discovery_n have_v that_o great_a man_n make_v by_o the_o help_n of_o his_o pneumatick_a engine_n and_o there_o be_v no_o doubt_n but_o more_o and_o perhaps_o great_a thing_n will_v be_v disclose_v by_o it_o when_o future_a ingenuity_n and_o diligence_n have_v improve_v and_o perfect_v this_o invention_n for_o what_o great_a thing_n be_v absolute_a and_o perfect_a in_o its_o first_o rise_n and_o beginning_n and_o it_o be_v like_o this_o instrument_n hereafter_o will_v be_v use_v and_o apply_v to_o thing_n yet_o unthought_a of_o for_o the_o advancement_n of_o knowledge_n and_o convenience_n of_o life_n chap._n ix_o the_o credit_n of_o optick-glass_n vindicate_v against_o a_o dispute_a man_n who_o be_v afraid_a to_o believe_v his_o eye_n against_o aristotle_n thus_o sir_n i_o have_v perform_v the_o first_o part_n of_o my_o promise_n by_o show_v what_o advantage_n the_o latter_a age_n and_o particular_o the_o royal_a society_n have_v for_o deep_a search_n into_o thing_n both_o by_o art_n and_o instrument_n new_o invent_v or_o improve_v above_o those_o enjoy_v by_o aristotle_n and_o the_o ancient_n to_o my_o discourse_n about_o the_o dioptrick_a tube_n the_o telescope_n and_o microscope_n the_o reverend_a disputer_n reply_v that_o our_o glass_n be_v all_o deceitful_a and_o fallacious_a which_o answer_n mind_v i_o of_o the_o good_a woman_n who_o when_o her_o husband_n urge_v in_o a_o occasion_n of_o difference_n i_o see_v it_o and_o shall_v i_o not_o believe_v my_o own_o eye_n reply_v brisk_o will_v you_o believe_v your_o own_o eye_n before_o your_o own_o dear_a wife_n and_o it_o seem_v this_o gentleman_n think_v it_o unreasonable_a we_o shall_v believe_v we_o before_o his_o own_o dear_a aristotle_n for_o a_o assurance_n of_o the_o credit_n of_o those_o glass_n i_o tell_v he_o he_o may_v try_v they_o upon_o object_n near_o and_o easy_o visible_a by_o the_o unassisted_a sight_n and_o if_o he_o make_v the_o trial_n he_o will_v find_v they_o alter_v the_o object_n in_o nothing_o but_o their_o proportion_n which_o be_v represent_v large_a for_o the_o advantage_n of_o vision_n in_o thing_n small_a and_o remote_a and_o we_o have_v all_o the_o like_a reason_n to_o distrust_v our_o eye_n as_o these_o glass_n for_o their_o information_n be_v the_o same_o in_o all_o thing_n but_o the_o mention_a difference_n and_o there_o be_v no_o man_n so_o much_o a_o fool_n as_o not_o to_o make_v allowance_n for_o that_o never_o be_v any_o yet_o so_o gross_o deceive_v by_o the_o microscope_n as_o to_o be_v persuade_v that_o a_o flea_n be_v as_o big_a as_o a_o lobster_n nor_o do_v the_o telescope_n ever_o make_v any_o one_o believe_v that_o the_o moon_n be_v at_o the_o end_n of_o his_o tube_n but_o if_o the_o former_a represent_v that_o little_a creature_n as_o bristle_a and_o ja●ared_v and_o the_o other_o make_v the_o planet_n mountainous_a and_o uneven_a we_o have_v no_o reason_n to_o believe_v but_o that_o their_o report_n be_v sincere_a though_o our_o unaided_a sense_n be_v too_o gross_a to_o perceive_v either_o the_o one_o or_o other_o since_o if_o the_o mention_a bristle_n and_o ja●ars_n be_v in_o the_o glass_n and_o nor_o in_o the_o animal_n they_o will_v appear_v in_o like_a manner_n in_o all_o the_o small_a creature_n which_o in_o the_o same_o light_n and_o position_n be_v look_v on_o through_o the_o microscope_n and_o if_o the_o ruggedness_n of_o surface_n be_v in_o it_o and_o not_o in_o the_o moon_n the_o same_o will_v be_v see_v upon_o all_o other_o distant_a object_n that_o be_v view_v through_o the_o other_o optic_a instrument_n and_o if_o there_o be_v deceit_n in_o those_o glass_n seaman_n have_v need_n beware_v how_o they_o trust_v they_o since_o the_o flag_n which_o appear_v to_o be_v those_o of_o their_o friend_n in_o the_o perspective_n may_v be_v real_o the_o colour_n of_o their_o enemy_n upon_o these_o account_n sir_n which_o afford_v plain_a and_o sensible_a evidence_n i_o wonder_v much_o at_o the_o disputer_n strange_a suspicion_n which_o have_v be_v scarce_o pardonable_a in_o a_o vulgar_a head_n and_o i_o know_v not_o what_o to_o call_v it_o in_o one_o that_o will_v be_v think_v a_o philosopher_n but_o the_o wary_a man_n give_v a_o reason_n which_o make_v i_o as_o much_o wonder_n at_o his_o argument_n as_o his_o doubt_n and_o to_o this_o attend_v you_o philosopher_n of_o the_o royal_a college_n and_o prepare_v yourselves_o to_o answer_v a_o demonstration_n from_o experience_n against_o your_o glass_n raise_v your_o expectation_n for_o a_o wonderful_a convictive_a experiment_n let_v the_o mountain_n travel_n and_o the_o birth_n will_v follow_v take_v two_o spectacle_n say_v the_o experimental_a sage_n use_v they_o at_o the_o same_o time_n and_o you_o will_v not_o see_v so_o well_o as_o with_o one_o single_o therefore_o your_o microscope_n and_o telescope_n be_v impostor_n this_o man_n sir_n be_v a_o logician_n and_o no_o doubt_n you_o perceive_v so_o o_o how_o i_o admire_v this_o rare_a faculty_n of_o argue_v how_o dull_a be_v our_o wit_n to_o those_o subtle_a eagle-eyed_a schoolman_n who_o see_v conclusion_n so_o far_o off_o through_o the_o more_o unerring_a telescope_n of_o their_o own_o pierce_a understanding_n do_v ever_o old_a man_n before_o make_v this_o use_n of_o his_o spectacle_n but_o to_o leave_v wonder_v let_v we_o endeavour_v to_o understand_v this_o philosophy_n of_o chue_n how_o a_o man_n may_v see_v by_o spectacle_n that_o perspective_n be_v deceitful_a we_o can_v see_v better_o through_o one_o pair_n than_o two_o say_v the_o deep_a philosopher_n most_o sage_o observe_v the_o argument_n begin_v strong_o but_o in_o the_o name_n of_o aristotle_n whence_o come_v the_o consequence_n therefore_o perspective_n be_v fallacious_a one_o proposition_n for_o sense_n and_o the_o other_o for_o convenience_n this_o fit_v his_o purpose_n to_o discredit_v new_a discovery_n it_o be_v no_o matter_n how_o it_o follow_v this_o gentleman_n you_o must_v know_v sir_n use_v to_o have_v his_o word_n take_v among_o his_o admire_a neighbour_n and_o so_o be_v not_o wont_a to_o be_v put_v to_o the_o trouble_n of_o prove_v but_o i_o be_v so_o unmannerly_a as_o to_o expect_v it_o choose_v rather_o to_o see_v with_o my_o own_o eye_n than_o his_o infallible_a spectacle_n we_o can_v see_v better_o say_v the_o disputer_n how_o do_v he_o know_v that_o if_o perspective_n deceive_v we_o though_o naked_a sense_n witness_n for_o they_o why_o may_v not_o his_o single_a spectacle_n be_v as_o deceitful_a as_o they_o these_o represent_v thing_n big_a than_o they_o be_v to_o the_o unaided_a sight_n and_o the_o philosophical_a glass_n do_v but_o the_o same_o thing_n in_o a_o high_a degree_n of_o magnify_v the_o object_n but_o we_o allow_v he_o the_o benefit_n of_o his_o single_a spectacle_n though_o he_o will_v not_o be_v so_o courteous_a to_o our_o glass_n and_o confess_v his_o reverend_a experiment_n of_o the_o use_n of_o two_o but_o be_v inquisitive_a about_o the_o consequence_n the_o reason_n of_o which_o certain_o must_v be_v if_o any_o be_v intend_v in_o it_o that_o our_o telescope_n and_o microscope_n have_v a_o glass_n at_o each_o end_n which_o the_o man_n of_o sapience_n think_v answer_v the_o two_o pair_n of_o spectacle_n and_o therefore_o must_v render_v the_o representation_n deceitful_a if_o this_o philosopher_n have_v spare_v some_o of_o those_o thought_n to_o the_o profitable_a doctrine_n of_o optic_n which_o he_o have_v spend_v upon_o genus_fw-la and_o species_n we_o have_v never_o hear_v of_o this_o objection_n which_o be_v as_o much_o a_o reason_n against_o the_o credit_n of_o all_o perspective_n glass_n whatsoever_o as_o the_o philosophical_a one_o he_o will_v discredit_v and_o without_o more_o optic_n than_o those_o of_o natural_a understanding_n he_o may_v if_o it_o have_v please_v he_o have_v know_v that_o we_o see_v better_o
coldness_n of_o the_o air_n and_o exhibit_v many_o rare_a and_o luciferous_a phaenomena_n which_o may_v help_v to_o better_a information_n about_o those_o quality_n than_o yet_o we_o have_v any_o and_o as_o to_o this_o i_o observe_v with_o the_o great_a verulam_n and_o the_o other_o bacon_n the_o illustrious_a mr._n boyle_n that_o heat_n and_o cold_a be_v the_o right_a and_o left_a hand_n of_o nature_n the_o former_a be_v the_o great_a instrument_n of_o most_o of_o she_o operation_n and_o the_o other_o have_v its_o interest_n and_o yet_o the_o philosophy_n of_o aristotle_n have_v neither_o do_v nor_o as_o much_o as_o attempt_v anything_o towards_o the_o discovery_n of_o their_o nature_n but_o content_v itself_o with_o the_o jejune_n vulgar_a and_o general_a description_n that_o heat_n be_v a_o quality_n that_o gather_v together_o thing_n of_o a_o like_a nature_n and_o sever_v those_o that_o be_v unlike_a and_o cold_a congregate_n both_o but_o now_o if_o we_o will_v know_v any_o thing_n deep_o in_o the_o business_n of_o rarefaction_n and_o condensation_n the_o doctrine_n of_o meteor_n and_o other_o material_a affair_n of_o nature_n other_o account_n about_o these_o thing_n must_v be_v endeavour_v and_o the_o bare_a information_n of_o our_o sense_n be_v not_o exact_a enough_o for_o this_o purpose_n for_o their_o report_n in_o this_o kind_n be_v various_a and_o uncertain_a according_a to_o the_o temper_n and_o disposition_n of_o our_o body_n and_o several_a unobserved_a accidental_a mutation_n that_o happen_v in_o they_o this_o instrument_n therefore_o have_v be_v invent_v to_o supply_v their_o defect_n and_o it_o give_v far_o more_o constant_a and_o accurate_a though_o perhaps_o not_o always_o infallible_a relation_n but_o the_o just_a be_v afford_v by_o the_o seal_a thermometer_n and_o beside_o the_o use_v of_o this_o instrument_n i_o suggest_v it_o will_v help_v very_o much_o in_o frame_v the_o history_n of_o wether_n which_o may_v be_v apply_v to_o many_o excellent_a purpose_n of_o philosophy_n and_o service_n of_o life_n chap._n viii_o of_o the_o barometer_n and_o air-pump_n and_o what_o advantage_n we_o have_v and_o may_v further_o expect_v from_o these_o instrument_n but_o iu_o the_o barometer_n be_v another_o late_a instrument_n very_o helpful_a to_o useful_a knowledge_n that_o there_o be_v gravity_n even_o in_o the_o air_n itself_o and_o that_o that_o element_n be_v only_o comparative_o light_a be_v now_o make_v evident_a and_o palpable_a by_o experience_n though_o aristotle_n and_o his_o school_n hold_v a_o different_a theory_n and_o by_o the_o help_n of_o quicksilver_n in_o a_o tube_n the_o way_n be_v find_v to_o measure_v all_o the_o degree_n of_o compression_n in_o the_o atmosphere_n and_o to_o estimate_v exact_o any_o accession_n of_o weight_n which_o the_o air_n receive_v from_o wind_n cloud_n or_o vapour_n to_o have_v say_v in_o elder_a time_n that_o mankind_n shall_v light_v upon_o a_o invention_n whereby_o those_o body_n may_v be_v weigh_v will_v certain_o have_v appear_v very_o wild_a and_o extravagant_a and_o it_o will_v be_v so_o account_v for_o some_o time_n yet_o till_o man_n have_v be_v long_o and_o be_v better_o acquaint_v with_o this_o instrument_n for_o we_o have_v no_o reason_n to_o believe_v it_o shall_v have_v better_a luck_n than_o the_o doctrine_n of_o the_o circulation_n the_o theory_n of_o antipode_n and_o all_o great_a discovery_n in_o their_o first_o proposal_n it_o be_v impossible_a to_o persuade_v some_o of_o the_o indian_n that_o live_v near_o the_o heat_n of_o the_o line_n that_o there_o be_v any_o such_o thing_n as_o ice_n in_o the_o world_n but_o if_o you_o talk_v to_o they_o of_o water_n make_v hard_a and_o consistent_a by_o cold_a they_o will_v laugh_v at_o you_o as_o a_o notorious_a romancer_n and_o those_o will_v appear_v as_o ridiculous_a among_o the_o most_o of_o we_o who_o shall_v affirm_v it_o possible_a to_o determine_v any_o thing_n of_o the_o weight_n of_o the_o wind_n or_o cloud_n but_o experience_n turn_v the_o laugh_n upon_o the_o confident_a incredulity_n of_o the_o scoffer_n and_o he_o that_o will_v not_o believe_v needs_o no_o more_o for_o his_o conviction_n than_o the_o labour_n of_o a_o trial_n let_v he_o then_o fill_v a_o tube_n of_o glass_n of_o some_o foot_n in_o length_n with_o quicksilver_n and_o have_v seal_v one_o end_n let_v he_o stop_v the_o other_o with_o his_o finger_n and_o immerge_n that_o which_o be_v so_o stop_v into_o a_o vessel_n of_o mercury_n the_o tube_n be_v perpendicular_o erect_v let_v he_o then_o subtract_v his_o finger_n and_o he_o will_v perceive_v the_o quicksilver_n to_o descend_v from_o the_o tube_n into_o the_o subjacent_a vessel_n till_o it_o come_v to_o 29_o digit_n or_o thereabouts_o there_o after_o some_o vibration_n it_o ordinary_o rest_v the_o reason_n that_o this_o remainder_n of_o the_o mercury_n do_v not_o descend_v also_o be_v because_o such_o a_o mercurial_a cylinder_n be_v just_o equiponderant_a to_o one_o of_o the_o incumbent_a atmosphere_n that_o lean_v upon_o the_o quicksilver_n in_o the_o vessel_n and_o so_o hinder_v a_o further_a descent_n it_o be_v conclude_v therefore_o that_o such_o a_o cylinder_n of_o the_o air_n as_o press_v upon_o the_o mercury_n in_o the_o vessel_n be_v of_o equal_a weight_n to_o about_o 29_o digit_n of_o that_o ponderous_a body_n in_o the_o tube_n thus_o it_o be_v when_o the_o air_n be_v in_o its_o ordinary_a temper_n but_o vapour_n wind_n and_o cloud_n alter_v the_o standard_n so_o that_o the_o quicksilver_n sometime_o fall_v sometime_o rise_v in_o the_o glass_n proportionable_o to_o the_o great_a or_o less_o accession_n of_o gravity_n and_o compression_n the_o air_n have_v receive_v from_o any_o of_o those_o alteration_n and_o the_o degree_n of_o increase_n beyond_o the_o standard_n be_v the_o measure_n of_o the_o additional_a gravity_n this_o experiment_n be_v the_o invention_n of_o torricellius_n and_o use_v to_o little_o more_o purpose_n at_o first_o but_o to_o prove_v a_o vacuum_n in_o nature_n and_o the_o desert_a part_n of_o the_o glass_n tube_n be_v by_o many_o think_v a_o absolute_a void_a which_o i_o believe_v be_v a_o mistake_n but_o it_o have_v be_v since_o improve_v to_o this_o design_n of_o weigh_v the_o degree_n of_o compression_n in_o the_o air_n a_o thing_n that_o may_v signify_v much_o in_o give_v we_o to_o understand_v its_o temper_n in_o several_a place_n on_o hill_n and_o in_o cave_n in_o divers_a region_n and_o climate_n which_o may_v tend_v to_o the_o disclose_v many_o excellent_a theory_n and_o help_n in_o humane_a life_n and_o the_o air_n be_v so_o catholic_n a_o body_n and_o have_v so_o great_a a_o influence_n upon_o all_o other_o and_o upon_o we_o that_o the_o advantage_n of_o such_o a_o instrument_n for_o the_o better_a acquaint_v we_o with_o its_o nature_n must_v needs_o be_v very_o considerable_a and_o a_o good_a aid_n to_o general_a philosophy_n and_o who_o yet_o know_v how_o far_o and_o to_o what_o discovery_n this_o invention_n may_v be_v improve_v the_o world_n a_o long_a time_n only_o rude_o stare_v upon_o the_o wonder_n of_o the_o loadstone_n before_o its_o use_n be_v find_v for_o the_o advantage_n of_o navigation_n and_o it_o be_v not_o impossible_a but_o that_o future_a time_n may_v derive_v so_o much_o benefit_n one_o way_n or_o other_o from_o this_o invention_n as_o may_v equal_v its_o esteem_n to_o that_o of_o the_o compass_n the_o royal_a society_n by_o their_o care_n and_o endeavour_n in_o the_o use_v this_o instrument_n give_v we_o hope_n that_o they_o will_v let_v none_o of_o its_o useful_a application_n to_o escape_v we_o and_o i_o know_v not_o whether_o we_o may_v not_o mention_v it_o as_o the_o first_o great_a benefit_n we_o have_v from_o it_o that_o it_o be_v a_o occasion_n of_o the_o invention_n of_o mr._n boyle_n famous_a pneumatick_a engine_n and_o this_o be_v the_o other_o instrument_n i_o note_v and_o call_v v._o the_o air-pump_a concern_v the_o usefulness_n of_o which_o that_o excellent_a person_n himself_o have_v give_v the_o best_a account_n in_o his_o discourse_n of_o physico-mechanical_a experiment_n make_v in_o that_o engine_n by_o which_o he_o have_v discover_v and_o prove_v a_o rare_a and_o luciferous_a theory_n viz._n the_o elastic_a power_n or_o spring_n of_o the_o air_n and_o by_o this_o have_v put_v to_o flight_v that_o odd_a fancy_n of_o the_o fuga_fw-la vacui_fw-la and_o show_v that_o the_o strange_a effect_n which_o use_v to_o be_v ascribe_v to_o that_o general_a and_o obscure_a cause_n do_v arise_v from_o the_o native_a self-expansion_n of_o the_o air._n the_o extent_n of_o which_o elastical_a expansion_n he_o have_v find_v divers_a way_n to_o measure_v by_o his_o engine_n which_o also_o discover_v the_o influence_n the_o air_n have_v on_o flame_n smoke_n and_o fire_n that_o it_o have_v none_o in_o operation_n magnetical_a that_o it_o be_v probable_o much_o intersperse_v in_o the_o pore_n