nay_o and_o probable_o into_o the_o diaphanous_a humour_n also_o be_v not_o discernible_a but_o when_o they_o be_v preter-natural_o distend_v in_o a_o ophthalmia_fw-la and_o so_o grow_v turgent_fw-la and_o conspicuous_a to_o which_o we_o may_v add_v that_o in_o most_o quick_a fish_n though_o you_o cut_v a_o piece_n of_o their_o flesh_n off_o yet_o will_v no_o blood_n be_v discernible_a though_o they_o be_v sanguineous_a animal_n but_o the_o blood_n be_v so_o divide_v by_o the_o minuteness_n of_o their_o capillary_a vessel_n or_o percribration_n through_o the_o habit_n of_o the_o part_n that_o either_o it_o have_v lose_v its_o redness_n or_o our_o eye_n be_v not_o able_a to_o discover_v its_o tincture_n second_o it_o be_v observable_a also_o from_o the_o former_a experiment_n that_o in_o these_o minute_n animal_n their_o nutritive_a liquor_n never_o arise_v to_o the_o perfection_n of_o blood_n but_o continual_o as_o it_o be_v remain_v chyle_n within_o they_o for_o want_v of_o a_o high_a 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all_o her_o operation_n both_o of_o sense_n and_o motion_n first_o for_o sense_n it_o be_v plain_a by_o what_o be_v discover_v in_o a_o vertigo_n for_o the_o brain_n itself_o be_v not_o of_o such_o a_o fluid_a substance_n as_o to_o turn_v round_o and_o make_v all_o object_n to_o do_v so_o too_o wherefore_o it_o be_v a_o sign_n that_o the_o immediate_a corporeal_a instrument_n of_o convey_v the_o image_n of_o thing_n be_v the_o spirit_n in_o the_o brain_n second_o that_o they_o be_v the_o chief_a engine_n of_o sight_n be_v plain_a not_o only_o because_o the_o eye_n be_v full_a of_o these_o livid_n spirit_n but_o also_o because_o dimness_n of_o sight_n come_v from_o deficiency_n of_o they_o though_o the_o part_n of_o the_o eye_n otherways_o be_v entire_a enough_o as_o in_o sick_a and_o old_a person_n and_o in_o those_o trouble_v with_o a_o amaurosis_n or_o gutta_n serena_n i_o have_v the_o last_o year_n a_o patient_n a_o young_a boy_n of_o seventeen_o year_n old_a who_o fall_v casual_o 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part_n of_o the_o body_n else_o we_o shall_v always_o be_v benumb_v and_o stupid_a as_o when_o our_o leg_n be_v asleep_a by_o a_o interception_n of_o the_o spirit_n second_o that_o their_o motion_n be_v slow_a in_o sensation_n then_o motion_n the_o former_a experiment_n of_o the_o snail_n do_v also_o manifest_a who_o animal_n spirit_n never_o begin_v to_o undulate_v till_o she_o begin_v to_o move_v whereas_o she_o be_v sensible_a when_o they_o be_v in_o quiescency_n as_o you_o may_v by_o prick_v she_o with_o a_o needle_n easy_o observe_v three_o in_o the_o return_n of_o the_o spirit_n into_o the_o stupefy_v leg_n we_o plain_o perceive_v by_o the_o prickle_a what_o a_o flow_n motion_n the_o spirit_n have_v all_o which_o phaenomena_n do_v seem_v to_o favour_v our_o former_a conjecture_n that_o for_o motion_n the_o spirit_n move_v impetuous_o down_o the_o nervous_a filament_n which_o be_v hollow_a but_o for_o sensation_n they_o only_o creep_v by_o a_o filtration_n down_o their_o coat_n and_o membrane_n now_o these_o spirit_n be_v so_o subtle_a and_o dissipable_a the_o soul_n spend_v they_o every_o day_n in_o use_v of_o they_o and_o they_o be_v much_o spend_v she_o can_v hardly_o move_v the_o body_n any_o long_o the_o sense_n whereof_o we_o call_v lassitude_n for_o certain_o as_o doctor_n more_o very_a ingenious_o infer_v if_o it_o be_v a_o immediate_a faculty_n of_o the_o soul_n to_o contribute_v motion_n to_o any_o matter_n i_o do_v not_o understand_v that_o faculty_n never_o fail_v nor_o diminish_v no_o more_o than_o the_o soul_n itself_o can_v fail_v or_o diminish_v that_o we_o shall_v ever_o be_v weary_a thus_o be_v the_o phaenomena_n of_o sense_n and_o motion_n best_o salve_v whilst_o we_o be_v awake_a now_o what_o happen_v when_o we_o sleep_v be_v a_o matter_n of_o further_a enquiry_n some_o have_v define_v sleep_n to_o be_v a_o migration_n of_o all_o the_o spirit_n out_o of_o the_o brain_n into_o the_o exterior_a part_n of_o the_o body_n whereas_o by_o our_o 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spirit_n do_v that_o be_v not_o pure_o rectify_v and_o to_o be_v return_v back_o by_o the_o lymphiduct_n again_o last_o i_o have_v but_o one_o paradoxical_a and_o extravagant_a quaere_fw-la to_o make_v and_o that_o be_v this_o that_o since_o we_o have_v prove_v these_o animal_n spirit_n to_o be_v the_o ultimate_a result_n of_o all_o the_o concoction_n of_o the_o body_n the_o very_a top_n and_o perfection_n of_o all_o nature_n operation_n the_o pure_a and_o most_o aetherial_a particle_n of_o all_o body_n in_o the_o world_n whatsoever_o and_o so_o consequent_o of_o near_a alliance_n to_o spirituality_n and_o the_o sole_a and_o immediate_a instrument_n of_o all_o the_o soul_n operation_n here_o even_o in_o statu_fw-la conjuncto_fw-la the_o body_n and_o the_o organ_n thereof_o be_v but_o secondary_a and_o subservient_fw-fr instrument_n to_o the_o spirit_n these_o thing_n be_v thus_o premise_v may_v
it_o not_o be_v probable_a enough_o that_o these_o spirit_n in_o the_o other_o world_n shall_v only_o be_v the_o soul_n vehicle_n and_o habit_n and_o indeed_o real_o that_o 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d 〈◊〉_d mention_v by_o the_o apostle_n by_o a_o vital_a reunion_n with_o which_o it_o may_v supereminent_o outact_v all_o that_o ever_o she_o be_v able_a to_o do_v in_o this_o earthly_a prison_n and_o heavy_a cottage_n of_o the_o body_n since_o also_o which_o i_o may_v super-adde_a those_o volatile_a spirit_n be_v free_v by_o a_o constant_a and_o perpetual_a dissipation_n from_o the_o body_n be_v diffuse_v through_o this_o great_a aetherial_a ocean_n as_o into_o their_o proper_a element_n ready_a to_o be_v unite_v to_o the_o soul_n at_o the_o instant_n of_o her_o separation_n four_o deduction_n fourthly_o the_o physiologist_n also_o may_v gather_v something_o from_o the_o former_a observation_n touch_v the_o nature_n of_o colour_n that_o they_o be_v indeed_o nothing_o but_o the_o various_a modification_n of_o light_n for_o most_o if_o not_o all_o body_n in_o their_o minute_n particle_n through_o which_o the_o sun_n ray_n have_v more_o freedom_n to_o penetrate_v seem_v to_o lose_v their_o colour_n and_o grow_v diaphanous_a as_o you_o may_v observe_v in_o the_o microscope_n second_o be_v it_o not_o shrewd_o probable_a that_o since_o motion_n be_v the_o cause_n of_o sight_n which_o be_v nothing_o else_o but_o the_o impulse_n that_o the_o luminous_a atom_n make_v upon_o the_o retina_fw-la be_v it_o not_o i_o say_v shrewd_o probable_a that_o colour_n be_v nothing_o else_o but_o a_o various_a modification_n of_o this_o motion_n since_o we_o see_v that_o they_o be_v both_o natural_o and_o artificial_o make_v by_o light_n to_o which_o we_o can_v imagine_v nothing_o to_o be_v add_v or_o deduct_v to_o super-induce_a those_o fine_a tincture_n as_o in_o the_o rainbow_n the_o prism_n crystal_n pendent_n glass-globe_n fill_v full_a of_o water_n and_o in_o those_o arenulous_a atom_n 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the_o same_o tincture_n second_o if_o with_o a_o prism_n you_o strike_v the_o rainbow-colour_n upon_o a_o wall_n and_o observe_v where_o a_o red_a be_v project_v you_o there_o place_v a_o eye_n the_o spectator_n shall_v judge_v it_o to_o be_v another_o colour_n because_o that_o the_o solary_a atom_n which_o shoot_v through_o the_o prism_n upon_o the_o wall_n and_o there_o paint_v that_o colour_n be_v again_o and_o again_o refract_v by_o the_o diaphanous_a humour_n of_o the_o eye_n must_v needs_o in_o all_o reason_n exchange_v their_o motion_n and_o so_o consequent_o paint_v the_o retina_fw-la with_o another_o colour_n both_o which_o experiment_n show_v that_o colour_n be_v nothing_o else_o but_o the_o modification_n of_o light_n which_o by_o the_o alteration_n of_o its_o motion_n be_v die_v into_o colour_n the_o like_a artificial_a alteration_n of_o the_o colour_n may_v be_v make_v by_o interpose_v a_o burning-glass_n betwixt_o the_o prism_n and_o the_o light_n and_o betwixt_o the_o prism_n and_o the_o paper_n but_o this_o cartesian_a theory_n of_o colour_n we_o shall_v further_o make_v out_o by_o several_a experiment_n in_o the_o extraction_n commixtion_n and_o transcoloration_n of_o tincture_n first_o therefore_o if_o into_o the_o infusion_n of_o violet_n you_o put_v some_o few_o drop_n of_o the_o oil_n of_o tartar_n per_fw-la deliquium_fw-la it_o will_v present_o strike_v it_o into_o a_o green_a tincture_n now_o if_o instead_o of_o that_o oil_n you_o put_v in_o oil_n of_o vitriol_n it_o strike_v it_o into_o a_o purple_a colour_n to_o which_o if_o you_o superadd_a some_o drop_n of_o spirit_n of_o hartshorn_n it_o strike_v it_o green_a again_o second_o if_o into_o the_o tincture_n of_o dry_a rose_n draw_v in_o hot-water_n with_o oil_n of_o vitriol_n after_o the_o usual_a manner_n you_o drop_v a_o few_o drop_n of_o spirit_n of_o hartshorn_n or_o of_o urine_n or_o of_o oil_n of_o tartar_n per_fw-la deliquium_fw-la it_o will_v present_o strike_v the_o red_a into_o a_o green_a colour_n which_o by_o a_o super-addition_n of_o the_o oil_n of_o vitriol_n you_o may_v re-tincture_n as_o before_o three_o if_o into_o a_o infusion_n of_o copperas_n you_o shave_v a_o little_a gall_n it_o present_o put_v on_o a_o sable_a inky_a colour_n into_o which_o if_o you_o put_v a_o few_o drop_n of_o the_o spirit_n or_o oil_n of_o vitriol_n it_o strike_v out_o the_o colour_n immediate_o and_o the_o water_n become_v white_a again_o to_o which_o if_o you_o superadd_a a_o few_o drop_n of_o oil_n of_o tartar_n per_fw-la deliquium_fw-la it_o re-denigrates_a it_o again_o thus_o a_o glass_n of_o the_o sweet-spaw-water_n also_o upon_o the_o infusion_n of_o gall_n turn_v into_o a_o claret-colour_n but_o if_o you_o drop_v but_o a_o little_a of_o the_o say_a oil_n or_o spirit_n into_o it_o it_o present_o eat_v out_o the_o colour_n and_o the_o water_n return_v to_o its_o primitive_a clearness_n again_o draw_v a_o faint_a tincture_n of_o brasil_n wood_n bruise_a or_o rasp_v in_o lukewarm_a water_n filter_n it_o and_o clarify_v it_o then_o if_o you_o add_v a_o little_a sharp_a vinegar_n to_o a_o good_a quantity_n of_o it_o it_o will_v strike_v it_o into_o the_o exact_a colour_n of_o good_a stale_a english_a beer_n and_o it_o will_v partly_o have_v the_o smell_n of_o it_o also_o second_o if_o into_o another_o quantity_n of_o the_o say_v red_a infusion_n you_o add_v a_o few_o drop_n of_o the_o oil_n of_o tartar_n per_fw-la deliquium_fw-la it_o will_v turn_v it_o to_o a_o pure_a purplish_a red_a like_o excellent_a claret_n three_o if_o into_o this_o artificial_a claret_n you_o drop_v a_o few_o drop_n of_o the_o oil_n of_o vitriol_n it_o will_v turn_v it_o into_o a_o pale_a amber_n colour_n like_o sack_n as_o may_v be_v which_o with_o addition_n of_o fair_a water_n you_o may_v empale_v as_o you_o please_v by_o which_o ingenious_a commixtion_n of_o spirit_n and_o liquor_n do_v floram_n marchand_n that_o famous_a water-drinker_n exhibit_v those_o rare_a trick_n and_o curiosity_n at_o london_n of_o vomit_v all_o kind_n of_o liquor_n at_o his_o mouth_n for_o first_o before_o he_o mount_v the_o stage_n he_o always_o drink_v in_o his_o private_a chamber_n fast_v a_o gill_n of_o the_o decoction_n of_o brasil_n then_o make_v his_o appearance_n he_o present_v you_o with_o a_o pail_n full_a of_o lukewarm_a water_n and_o twelve_o or_o thirteen_o glass_n some_o wash_v in_o vinegar_n other_o with_o oil_n of_o tartar_n and_o oil_n of_o vitriol_n then_o he_o drink_v four_o and_o twenty_o glass_n of_o the_o water_n and_o careful_o take_v up_o the_o glass_n which_o be_v wash_v with_o oil_n of_o tartar_n he_o vomit_v a_o red_a liquor_n into_o it_o which_o present_o be_v brighten_v up_o and_o tinge_v into_o perfect_a and_o lovely_a claret_n after_o this_o first_o assay_n he_o drink_v six_o or_o seven_o glass_n more_o the_o better_a to_o provoke_v his_o vomit_v as_o also_o the_o more_o to_o dilute_v and_o empale_v the_o brasil_n decoction_n within_o he_o and_o then_o he_o take_v a_o glass_n rinse_v in_o vinegar_n and_o vomit_v it_o full_a which_o instant_o by_o its_o acidity_n be_v transcoloured_a into_o english_a beer_n and_o vomit_v also_o at_o the_o same_o time_n into_o another_o glass_n which_o he_o wash_v in_o fair_a water_n he_o present_v the_o spectator_n with_o a_o glass_n of_o pale_a claret_n or_o burgundian_n wine_n then_o drink_v again_o as_o before_o he_o pick_v out_o the_o glass_n wash_v with_o oil_n of_o vitriol_n and_o vomit_v a_o faint_a brasil-water_n into_o it_o it_o present_o appear_v to_o be_v sack_n and_o perchance_o if_o he_o wash_v the_o one_o half_a of_o the_o glass_n with_o spirit_n of_o sack_n it_o will_v have_v a_o faint_a odour_n and_o flavour_n of_o that_o wine_n also_o he_o than_o begin_v his_o carouse_n again_o and_o drink_v fifteen_o or_o sixteen_o glass_n till_o he_o have_v almost_o extinguish_v the_o strength_n and_o tincture_n of_o his_o brasil_n water_n
of_o i_o have_v pile_v up_o many_o cartloads_a of_o these_o brass-lump_n in_o a_o barn_n of_o he_o for_o some_o secret_a purpose_n of_o his_o own_o the_o roof_n let_v rain-water_n fall_v copious_o in_o among_o they_o they_o all_o begin_v to_o smoke_n and_o at_o last_o to_o take_v fire_n and_o burn_v like_o red_a hot_a coal_n so_o that_o the_o town_n be_v in_o a_o uproar_n about_o quench_v of_o they_o and_o one_o thing_n further_o i_o take_v special_a notice_n of_o in_o this_o unlucky_a experiment_n that_o the_o water_n which_o drain_v from_o the_o quench_n of_o they_o leave_v little_a piece_n and_o crystal_n of_o copperase_n stick_v all_o along_o to_o the_o pile_n of_o grass_n that_o grow_v in_o the_o croft_n it_o run_v down_o thus_o antimony_n and_o sublimate_n be_v mix_v together_o will_v grow_v so_o hot_a the_o one_o relax_v the_o ferment_a spirit_n in_o the_o other_o that_o they_o be_v not_o to_o be_v touch_v thus_o in_o the_o corrosion_n of_o metal_n by_o aqua_fw-la fortis_fw-la what_o a_o strong_a heat_n be_v there_o in_o the_o liquor_n and_o what_o a_o steam_n constant_o evaporate_v during_o their_o fermentation_n in_o the_o commixtion_n of_o oil_n of_o vitriol_n with_o oil_n of_o tartar_n per_fw-la deliquium_fw-la what_o a_o violent_a heat_n and_o effervescence_n do_v present_o arise_v beside_o a_o sharp_a and_o acrimonious_a vapour_n that_o strike_v our_o nostril_n nay_o and_o we_o see_v our_o subterraneous_a damp_n do_v sometime_o with_o intermixtion_n with_o the_o moist_a air_n grow_v to_o that_o over-height_n of_o fermentation_n that_o they_o fire_n of_o themselves_o and_o strike_v down_o all_o before_o they_o thus_o the_o spirit_n of_o niter_n mix_v with_o butter_n of_o antimony_n grow_v so_o hot_a that_o it_o be_v ready_a to_o rise_v in_o a_o flame_n thus_o certain_o do_v all_o bath_n receive_v their_o heat_n from_o mineral_n vapour_n or_o the_o mineral_n themselves_o be_v in_o solutis_fw-la principiis_fw-la and_o so_o the_o ferment_a spirit_n set_v a_o play_v in_o they_o as_o the_o learned_a doctor_n jordan_n do_v most_o rational_o conjecture_v this_o universal_a ferment_a spirit_n do_v not_o only_o play_v these_o feat_n in_o the_o mineral_n but_o also_o operate_v in_o the_o same_o manner_n in_o the_o vegetable_a kingdom_n which_o we_o ocular_o behold_v in_o the_o artifice_n of_o malt_n where_o the_o grain_n of_o barley_n be_v moisten_v with_o water_n the_o part_n be_v relax_v the_o internal_a spirit_n in_o they_o be_v dilate_v and_o put_v into_o action_n and_o the_o superfluity_n of_o water_n be_v remove_v which_o may_v choke_v it_o and_o the_o barley_n be_v lay_v up_o in_o heap_n the_o fermentation_n and_o heat_n present_o appear_v with_o a_o kind_n of_o vinous_a steam_n and_o effluvium_n which_o pass_v from_o it_o and_o therefore_o it_o shoot_v forth_o into_o spire_n thus_o we_o see_v in_o wet-hay_a how_o the_o spirit_n work_v not_o only_o to_o a_o heat_n but_o if_o they_o be_v not_o cool_v and_o prevent_v by_o ventilation_n they_o break_v out_o into_o a_o flame_n also_o nay_o in_o all_o vegetable_n there_o be_v this_o constant_a heat_n though_o it_o be_v below_o our_o sensation_n as_o it_o be_v in_o some_o fish_n and_o cold_a animal_n also_o and_o a_o constant_a steam_n and_o transpiration_n of_o particle_n as_o we_o have_v experimental_o prove_v in_o our_o xxv_o observation_n and_o now_o let_v we_o pursue_v these_o spirit_n into_o the_o animal_n kingdom_n and_o we_o shall_v see_v that_o they_o have_v the_o like_a effect_n and_o operation_n there_o also_o as_o be_v former_o observe_v only_o be_v there_o in_o great_a plenty_n and_o more_o pure_o refine_v and_o in_o a_o constant_a state_n of_o fusion_n and_o volatility_n they_o work_v noble_a effect_n now_o the_o spirit_n that_o be_v lodge_v in_o all_o the_o meat_n and_o drink_v we_o receive_v be_v more_o or_o less_o fix_v therein_o what_o do_v the_o soul_n but_o like_o a_o excellent_a chemist_n in_o this_o internal_a laboratory_n of_o man_n by_o a_o fermentation_n of_o our_o nourishment_n in_o the_o stomach_n and_o gut_n a_o filtration_n thereof_o through_o the_o lacteae_fw-la a_o digestion_n in_o the_o heart_n a_o circulation_n and_o rectification_n in_o the_o vein_n and_o artery_n what_o do_v she_o i_o say_v by_o these_o several_a physico-chymical_a operation_n but_o strive_v all_o this_o while_n to_o unfix_v exalt_v and_o volatilize_v the_o spirit_n contain_v in_o our_o nutriment_n that_o so_o they_o may_v be_v transmit_v to_o the_o brain_n and_o its_o divarication_n and_o in_o that_o reconditory_a keep_v and_o reposit_v for_o her_o use_n and_o service_n so_o that_o these_o we_o now_o call_v animal_n spirit_n be_v the_o pure_a subtle_a and_o most_o volatile_a particle_n and_o active_a atom_n of_o the_o blood_n which_o by_o continual_a pulsation_n of_o the_o heart_n be_v carry_v with_o the_o blood_n by_o the_o carotidal_a artery_n up_o into_o the_o brain_n and_o there_o by_o that_o lax_n and_o boggy_a substance_n be_v imbibe_v and_o separate_v from_o the_o blood_n and_o thence_o by_o the_o spinal_a marrow_n and_o nerve_n transmit_v to_o all_o the_o part_n of_o the_o body_n now_o as_o the_o chyle_n be_v perfect_v in_o the_o stomach_n and_o gut_n and_o their_o appendent_a vessel_n the_o lacteal_v vein_n and_o as_o the_o blood_n be_v perfect_v in_o the_o heart_n and_o it_o be_v annex_v vessel_n the_o vein_n and_o artery_n so_o the_o animal_n spirit_n be_v separate_v preserve_v and_o perfect_v in_o the_o brain_n with_o its_o continue_a trunk_n and_o branch_n viz._n the_o spinal_a marrow_n nerve_n and_o fiber_n for_o the_o use_n hereafter_o to_o be_v declare_v now_o the_o two_o former_a liquor_n the_o chyle_n and_o the_o blood_n because_o of_o their_o grosser_n liquidity_n need_v to_o be_v convey_v in_o hollow_a pipe_n and_o channel_n viz._n the_o vein_n and_o artery_n but_o the_o spirit_n which_o be_v the_o quintessence_n of_o they_o both_o can_v easy_o pass_v by_o a_o swift_a filtration_n through_o the_o 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and_o cylindrical_a membrane_n may_v serve_v for_o sensation_n so_o that_o it_o seem_v this_o cottage_n of_o clay_n with_o all_o its_o furniture_n within_o it_o be_v but_o make_v in_o subserviency_n to_o the_o animal_n spirit_n for_o the_o extraction_n separation_n and_o depuration_n of_o which_o the_o whole_a body_n and_o all_o the_o organ_n and_o utensil_n therein_o be_v but_o instrumental_o contrive_v and_o preparatory_o design_v just_o as_o the_o chemical_a elaboratory_n with_o all_o its_o furnace_n crucible_n still_n retort_v cucurbit_n matrat_n bolt-head_n pelican_n etc._n etc._n be_v make_v for_o no_o other_o end_n by_o the_o ingenious_a chemist_n than_o for_o the_o extraction_n and_o depuration_n of_o his_o spirit_n and_o quintessence_n which_o he_o draw_v from_o those_o body_n he_o deal_v with_o in_o the_o obtainment_n of_o which_o he_o have_v come_v to_o the_o ultimate_a design_n of_o his_o endeavour_n now_o as_o in_o mineral_n and_o vegetable_n the_o colluctancy_n of_o 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airy_a magnetical_a and_o celestial_a particle_n beside_o the_o halituous_a effluvium_n of_o all_o body_n whatsoever_o but_o this_o contrary_a to_o observat_fw-la chap._n v._n that_o the_o evacuated_a cylinder_n in_o the_o tube_n be_v not_o fill_v with_o atmosphaerical_a air_n only_o by_o atmosphaerical_a air_n i_o understand_v such_o as_o we_o constant_o breathe_v and_o live_v in_o and_o be_v a_o mix_a body_n of_o luminous_a and_o magnetical_a effluvium_n powder_v with_o the_o influential_a atom_n of_o heaven_n from_o above_o and_o the_o halituous_a effluxion_n and_o aporrhoea_n of_o this_o terraqueous_a globe_n below_o and_o that_o no_o such_o air_n fill_v the_o superior_a cavity_n of_o the_o tube_n take_v this_o experiment_n to_o evince_v you_o experiment_n 5._o have_v fill_v close_v and_o reverse_v the_o tube_n ab_fw-la as_o before_o into_o the_o vesseled_a quicksilver_n d_o fill_v up_o the_o say_a vessel_n with_o water_n about_o 2._o inch_n deep_a then_o lift_v the_o tube_n 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roberuallius_n therein_o ingenious_o conceive_v that_o the_o whole_a mass_n of_o air_n have_v a_o spontaneous_a eleter_n or_o natural_a aptitude_n in_o itself_o to_o dilate_v and_o expand_v itself_o upon_o the_o removal_n of_o all_o circumambient_a obstacle_n which_o he_o call_v the_o elastical_a motion_n of_o that_o element_n so_o that_o the_o particle_n of_o air_n may_v be_v understand_v to_o be_v as_o many_o little_a spring_n which_o if_o at_o liberty_n and_o not_o bind_v and_o squeeze_a up_o will_v powerful_o strong_o and_o spontaneous_o dilate_v and_o stretch_v out_o themselves_o not_o only_o to_o fill_v up_o a_o large_a room_n but_o to_o remove_v great_a body_n so_o that_o he_o compare_v this_o vast_a element_n of_o air_n circumfuse_v about_o this_o terraqueous_a globe_n to_o a_o great_a heap_n of_o wooll-fleece_n or_o sponge_n pile_v one_o upon_o another_o the_o superior_a particle_n of_o the_o air_n press_v the_o inferior_a and_o hinder_v their_o continual_a tendency_n to_o a_o self-dilatation_n so_o that_o all_o the_o particle_n of_o this_o atmosphaere_n especial_o the_o inferior_a sort_n strive_v at_o all_o time_n to_o expand_v and_o dilate_v themselves_o and_o when_o the_o circumresistency_n of_o other_o contiguous_a body_n to_o they_o be_v remove_v than_o they_o fly_v out_o into_o their_o desire_a expansion_n or_o at_o least_o will_v dilate_v so_o far_o as_o neighbour_a obstacle_n will_v permit_v just_o like_o the_o spring_n of_o a_o watch_n which_o if_o the_o string_n be_v break_v present_o fly_v out_o into_o its_o full_a expansion_n which_o elastic_a motion_n in_o the_o air_n than_o cease_v when_o it_o come_v to_o a_o aequilibration_n with_o those_o circumjacent_a body_n that_o resist_v it_o that_o this_o be_v not_o only_o a_o ingenious_a hypothesis_n but_o that_o there_o be_v much_o of_o reality_n and_o truth_n in_o it_o i_o think_v our_o follow_a experiment_n will_v to_o safety_n of_o satisfaction_n demonstrate_v only_o we_o differ_v from_o pecquet_n in_o the_o strict_a notion_n he_o have_v of_o rarefaction_n and_o condensation_n which_o he_o suppose_v to_o be_v perform_v without_o either_o intromission_n or_o exclusion_n of_o any_o other_o extraneous_a body_n whatsoever_o now_o how_o air_n or_o any_o other_o body_n shall_v diminish_v or_o augment_v its_o quantity_n which_o be_v the_o most_o close_a and_o essential_a attribute_n to_o body_n without_o change_n of_o its_o own_o substance_n or_o at_o least_o without_o a_o reception_n or_o exclusion_n of_o some_o other_o extrinsical_a body_n either_o into_o or_o out_o of_o the_o porosity_n thereof_o sound_v not_o only_o harsh_a to_o our_o ear_n but_o be_v beside_o a_o unintelligible_a difficulty_n now_o though_o we_o can_v by_o sensible_a and_o mechanical_a demonstration_n show_v how_o any_o new_a substance_n or_o subtle_a matter_n than_o air_n be_v which_o enter_v into_o the_o tube_n to_o replenish_v that_o seem_a vacuity_n and_o to_o fill_v up_o the_o aerial_a interstice_n which_o must_v needs_o be_v considerable_a in_o so_o great_a a_o self-dilation_n yet_o we_o must_v consider_v the_o nature_n of_o rarefaction_n aforesaid_a be_v force_v to_o believe_v it_o and_o perhaps_o some_o happy_a experimenter_n hereafter_o may_v come_v to_o give_v we_o a_o better_a than_o this_o speculative_a and_o metaphysical_a evidence_n of_o it_o that_o the_o hollow_a cylinder_n in_o the_o tube_n be_v not_o only_o fill_v up_o with_o the_o dilate_a particle_n of_o air_n but_o also_o with_o a_o thin_a aetherial_a substance_n intermingle_v with_o they_o 1._o let_v we_o suppose_v therefore_o at_o random_n if_o you_o please_v that_o there_o be_v a_o thin_a subtle_a aetherial_a substance_n diffuse_v throughout_o the_o universe_n nay_o which_o indeed_o by_o far_o the_o great_a thereof_o in_o which_o all_o these_o luminous_a and_o opace_fw-la body_n i_o mean_v the_o star_n and_o planet_n with_o their_o luminous_a and_o vaporous_a sphere_n continual_o effluviate_a from_o they_o do_v swim_v at_o free_a and_o full_a liberty_n 2._o let_v we_o consider_v that_o this_o aether_n be_v of_o that_o subtle_a and_o penetrative_a nature_n that_o like_o the_o magnetical_a effluvium_n it_o shoot_v itself_o through_o all_o body_n whatsoever_o who_o be_v small_a pore_n and_o interstice_n be_v supply_v and_o fill_v up_o with_o this_o aetherial_a substance_n as_o a_o sponge_n with_o water_n 3._o let_v we_o add_v to_o the_o former_a consideration_n that_o the_o air_n have_v not_o only_o a_o strong_a elatery_a of_o its_o own_o by_o which_o it_o press_v continual_o upon_o the_o earth_n and_o all_o body_n circuminclose_v by_o it_o but_o it_o also_o ponderates_n and_o be_v heavy_a in_o its_o own_o atmosphaere_n but_o because_o i_o be_o resolve_v you_o shall_v take_v nothing_o upon_o the_o trust_n and_o reputation_n of_o the_o best_a author_n take_v this_o experiment_n to_o prove_v the_o air_n be_v gravitation_n in_o proprio_fw-la loco_fw-la as_o the_o vulgar_a philosophy_n call_v it_o experiment_n 6._o take_v a_o windgun_n which_o new_a artifice_n be_v now_o common_a and_o weigh_v it_o exact_o when_o empty_a then_o by_o ply_v the_o pump-staff_n charge_v it_o sound_o and_o weigh_v it_o again_o and_o you_o shall_v find_v it_o much_o heavy_a than_o before_o yea_o a_o large_a bladder_n full_o blow_v will_v weigh_v more_o than_o its_o self_n empty_v and_o manifest_v this_o inequality_n upon_o a_o ticklish_a pair_n of_o scales_n now_o though_o this_o experiment_n seem_v only_o to_o evince_v the_o gravitation_n of_o air_n condense_v yet_o it_o consequential_o follow_v that_o air_n also_o in_o the_o liberty_n of_o its_o own_o sphere_n be_v proportional_o ponderous_a though_o it_o be_v a_o difficult_a point_n mechanical_o to_o evince_v it_o unless_o we_o be_v actual_o above_o the_o atmosphaere_n or_o in_o a_o vacuity_n to_o weigh_v it_o there_o in_o a_o thin_a medium_n than_o here_o we_o be_v able_a to_o do_v yet_o if_o i_o mistake_v not_o i_o have_v a_o experiment_n in_o banco_n which_o will_v give_v some_o mechanical_a evidence_n of_o this_o