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in_o a_o university_n and_o a_o great_a many_o more_o improve_v in_o successful_a and_o judicious_a practice_n have_v sufficient_o qualify_v you_o for_o a_o judge_n and_o patron_n when_o i_o consider_v the_o former_a and_o withal_o my_o own_o weakness_n i_o confess_v i_o have_v less_o reason_n to_o desire_v the_o latter_a but_o sinoe_v it_o usual_o happen_v that_o those_o that_o be_v least_o subject_n to_o fault_n be_v common_o candid_a critic_n and_o most_o ready_a to_o forgive_v other_o i_o be_o bold_a to_o beg_v your_o patronage_n yet_o not_o for_o its_o fault_n since_o that_o be_v below_o your_o judgement_n but_o whatever_o truth_n be_v contain_v in_o it_o which_o will_v scarce_o be_v deny_v by_o one_o that_o be_v so_o much_o a_o encourager_n of_o learning_n but_o perhaps_o i_o ought_v to_o make_v a_o apology_n to_o you_o as_o well_o as_o the_o world_n for_o deviate_a from_o the_o opinion_n of_o some_o learned_a man_n especiat_o of_o that_o never_o too_o much_o honour_v dr._n willis_n who_o be_v one_o of_o the_o great_a physician_n of_o his_o and_o precede_a age_n and_o true_o all_o that_o i_o can_v say_v for_o myself_o be_v that_o as_o it_o will_v be_v below_o the_o character_n of_o so_o great_a a_o man_n to_o write_v any_o thing_n upon_o any_o other_o consideration_n than_o a_o improvement_n of_o knowledge_n and_o truth_n so_o undoubted_o he_o will_v not_o desire_v any_o thing_n he_o write_v shall_v be_v believe_v except_o it_o seem_v so_o that_o than_o which_o i_o hope_v will_v be_v a_o apology_n for_o such_o a_o attempt_n be_v that_o i_o have_v consider_v his_o opinion_n with_o no_o other_o design_n than_o a_o endeavour_n after_o truth_n and_o have_v offer_v nothing_o against_o his_o opinion_n but_o plain_a and_o unprejudiced_a reason_n and_o though_o i_o have_v give_v reason_n enough_o to_o prove_v he_o be_v mistake_v in_o this_o point_n yet_o i_o must_v ever_o have_v the_o great_a veneration_n and_o esteem_n for_o all_o such_o man_n of_o 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you_o have_v be_v please_v to_o take_v i_o into_o your_o favour_n and_o also_o that_o you_o will_v pardon_v i_o for_o take_v this_o liberty_n since_o it_o be_v only_o design_v to_o testify_v my_o gratitude_n for_o those_o favour_n you_o have_v already_o be_v please_v to_o confer_v on_o your_o very_a humble_a and_o oblige_a servant_n r._n boulton_n the_o content_n the_o introduction_n page_z 1_o our_o knowledge_n be_v very_o short_a ibid._n and_o imperfect_a p._n 3_o the_o pursuit_n of_o knowledge_n very_o desirable_a p._n 4_o where_o most_o easy_o attain_v p._n 5_o the_o heat_n of_o the_o blood_n not_o obscure_a in_o respect_n of_o its_o cause_n p._n 6_o the_o opinion_n of_o the_o ancient_n very_o superficial_a p._n 9_o dr._n willis_n opinion_n answer_v p._n 11_o but_o one_o way_n by_o which_o body_n grow_v hot_a p._n 13_o fire_n be_v rarify_v matter_n in_o motion_n p._n 16_o heat_v not_o actual_o in_o the_o body_n that_o cause_v it_o p._n 19_o heat_v only_o a_o sensation_n p._n 20_o heat_v only_o produce_v one_o way_n prove_v further_o in_o answer_n to_o dr._n willis_n p._n 23_o a_o objection_n answer_v p._n 27_o his_o comparison_n of_o the_o blood_n be_v accension_n with_o flame_n answer_v p._n 28_o several_a degree_n of_o heat_n without_o flame_n p._n 29_o nitre_n make_v no_o part_n of_o the_o flame_n p._n 32_o how_o nitre_n promote_v flame_n p._n 33_o why_o a_o candle_n in_o a_o glass-globe_n be_v extinguish_v by_o extract_v air._n p._n 36_o whether_o nitre_n promote_v the_o heat_n of_o the_o blood_n p._n 39_o liquid_n fetter_v up_o heat_n without_o nitre_n p._n 41_o blood_n may_v grow_v hot_a without_o a_o sulphureous_a pabulum_fw-la p._n 42_o his_o comparison_n of_o the_o recrement_n of_o flame_n and_o blood_n answer_v p._n 43_o a_o digression_n why_o flame_n usual_o ascend_v p._n 50_o why_o it_o sometime_o descend_v p._n 60_o diemerbroek_n opinion_n answer_v p._n 62_o dr._n henshaw_n opinion_n answer_v p._n 65_o of_o the_o true_a reason_n of_o the_o heat_n of_o the_o blood_n p._n 67_o animal_n spirit_n demonstrate_v p._n 80_o that_o they_o be_v in_o motion_n through_o the_o nerve_n p._n 89_o the_o nature_n of_o they_o p._n 91_o the_o reason_n of_o the_o heat_n of_o the_o blood_n explain_v p._n 94_o that_o reason_n of_o its_o heat_n prove_v p._n 100_o by_o attrition_n p._n 103_o how_o the_o animal_n spirit_n rarify_v the_o blood_n p._n 111_o why_o the_o heat_n vary_v p._n 112_o how_o sp._n of_o c._n c._n raise_v the_o pulse_n p._n 116_o the_o reason_n of_o flush_a heat_n p._n 120_o how_o far_o the_o blood_n and_o spirit_n be_v active_a and_o passive_a p._n 131_o how_o the_o heat_n of_o the_o blood_n be_v continue_v p._n 132_o some_o objection_n answer_v p._n 134_o why_o its_o heat_n decline_v p._n 139_o of_o the_o use_n of_o the_o lung_n p._n 159_o in_o respect_n of_o the_o soul_n p._n 162_o why_o they_o
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sulphureous_a oily_a matter_n be_v far_a manifest_a by_o expose_v the_o brain_n of_o any_o animal_n to_o the_o air_n because_o they_o present_o grow_v rancid_n and_o fetid_v it_o appear_v then_o that_o the_o animal_n spirit_n be_v a_o oily_a mucilaginous_a substance_n abound_v with_o the_o most_o volatile_a salt_n and_o sulphur_n of_o the_o blood_n and_o that_o they_o be_v in_o a_o continual_a circulation_n from_o the_o brain_n and_o spinal_a marrow_n through_o the_o branch_n of_o the_o nerve_n and_o that_o be_v forcible_o lay_v down_o in_o the_o gland_n there_o meet_v with_o the_o arterial_a blood_n i_o shall_v next_o endeavour_v to_o show_v how_o the_o heat_n of_o the_o blood_n be_v carry_v on_o and_o continue_v which_o i_o conceive_v to_o be_v after_o this_o manner_n these_o oily_a salino-sulphureous_a spirit_n be_v violent_o drive_v explain_v through_o the_o nerve_n meet_v with_o the_o arterial_a blood_n in_o the_o glandule_n and_o these_o two_o liquor_n be_v forcible_o drive_v one_o against_o another_o the_o particle_n of_o they_o be_v intimate_o mix_v together_o by_o which_o mean_v the_o animal_n spirit_n be_v as_o if_o it_o be_v ground_n and_o rub_v betwixt_o the_o fix_a and_o more_o solid_a particle_n of_o the_o blood_n whereby_o they_o be_v minutely_o dissolve_v and_o be_v put_v into_o a_o swift_a intestine_a motion_n they_o endavour_v powerful_o to_o expand_v themselves_o and_o to_o fly_v away_o but_o be_v hold_v in_o and_o reverberate_v by_o those_o grosser_n particle_n their_o motion_n be_v by_o that_o mean_v invert_v and_o that_o force_v which_o if_o they_o have_v but_o liberty_n will_v be_v lose_v in_o a_o further_a expansion_n be_v invert_v and_o drive_v forcible_o upon_o the_o other_o particle_n they_o mutual_o increase_v and_o promote_v one_o another_o motion_n by_o which_o motion_n the_o blood_n when_o it_o affect_v our_o sensory_a cause_v we_o to_o perceive_v heat_n in_o carry_v on_o of_o which_o it_o be_v to_o be_v observe_v that_o the_o animal_n promote_v spirit_n be_v thus_o accidental_o expanded_a and_o put_v into_o motion_n by_o the_o grosser_n part_n of_o the_o blood_n and_o be_v thus_o hold_v in_o and_o strike_v back_o by_o they_o do_v not_o only_o by_o that_o mean_n fly_v back_o and_o increase_v each_o other_o motion_n but_o also_o hurry_v the_o grosser_n particle_n of_o the_o blood_n along_o with_o they_o and_o so_o increase_v their_o motion_n and_o by_o strike_v against_o they_o and_o knoke_v they_o together_o break_v they_o as_o if_o it_o be_v into_o small_a part_n and_o consequent_o ratify_v and_o expand_v they_o also_o it_o be_v further_a to_o be_v observe_v that_o as_o these_o spirit_n they_o be_v more_o or_o less_o in_o quantity_n so_o the_o gross_a part_n of_o the_o blood_n grind_v they_o together_o and_o put_v they_o in_o motion_n they_o more_o powerful_o or_o less_o vigorous_o expand_v and_o move_v according_o digest_v and_o rarify_v the_o mass_n of_o blood_n to_o a_o high_a or_o low_a degree_n and_o consequent_o put_v the_o part_n of_o it_o into_o a_o strong_a or_o weak_a motion_n we_o may_v further_o take_v notice_n also_o that_o the_o sharp_a the_o particle_n motion_n of_o the_o blood_n be_v so_o they_o corrode_v and_o grind_v the_o spirit_n into_o part_n with_o great_a violence_n and_o consequent_o sharpen_v their_o motion_n again_o when_o the_o mass_n of_o blood_n be_v very_o full_a of_o and_o plentiful_o ferment_v abound_v with_o volatile_a salt_n &_o sulphur_n the_o particle_n of_o it_o be_v with_o less_o difficulty_n put_v into_o motion_n by_o the_o spirit_n and_o join_v with_o they_o increase_v their_o motion_n and_o on_o the_o contrary_a when_o the_o mass_n of_o blood_n be_v more_o dull_a and_o phlegmatic_a it_o neither_o so_o powerful_o grind_v the_o animal_n spirit_n nor_o be_v so_o easy_o put_v into_o motion_n itself_o furthermore_o the_o animal_n spirit_n do_v not_o only_o according_a to_o spirit_n their_o different_a quantity_n different_o exagitate_v the_o mass_n of_o blood_n but_o also_o according_a to_o their_o different_a degree_n of_o activity_n whence_o the_o more_o volatile_a and_o strong_a the_o spirit_n be_v the_o more_o conspicuous_a be_v their_o effect_n last_o we_o may_v take_v notice_n that_o neither_o the_o animal_n spirit_n passive_a nor_o the_o mass_n of_o blood_n be_v altogether_o active_a or_o passive_a in_o produce_v these_o effect_n but_o mutual_o both_o of_o they_o and_o by_o turn_v have_v premise_v this_o short_a account_n of_o the_o heat_n of_o the_o blood_n without_o any_o manner_n of_o proof_n to_o the_o end_n that_o we_o may_v have_v a_o more_o clear_a and_o entire_a view_n how_o it_o be_v cause_v without_o the_o interruption_n it_o will_v have_v make_v to_o prove_v every_o paragraph_n as_o i_o propose_v it_o i_o shall_v now_o proceed_v to_o a_o proof_n of_o what_o i_o have_v propose_v collective_o for_o the_o material_a formal_a and_o efficient_a cause_n of_o it_o and_o first_o that_o the_o animal_n spirit_n and_o arterial_a blood_n be_v both_o forcible_o lay_v down_o in_o the_o glandule_n i_o have_v give_v sufficient_a reason_n to_o evince_v in_o my_o treatise_n of_o muscular_a motion_n and_o have_v give_v further_a proof_n of_o it_o here_o to_o prove_v then_o that_o the_o heat_n of_o the_o blood_n do_v proceed_v prove_v from_o that_o fermentation_n it_o be_v necessary_a to_o explain_v the_o mechanical_a motion_n of_o the_o part_n of_o those_o liquor_n that_o work_n mutual_o one_o upon_o another_o i_o shall_v in_o the_o next_o place_n show_v that_o the_o heat_n of_o the_o blood_n be_v cause_v by_o such_o a_o mechanical_a motion_n of_o part_n as_o i_o have_v before_o mention_v that_o the_o animal_n spirit_n than_o be_v forcible_o drive_v against_o the_o arterial_a blood_n be_v so_o self_n evident_a that_o it_o need_v no_o proof_n and_o if_o so_o it_o must_v needs_o follow_v that_o the_o particle_n of_o the_o one_o will_v be_v intimate_o mix_v with_o the_o other_o and_o it_o be_v undeniable_o true_a that_o the_o animal_n spirit_n will_v by_o that_o mean_n be_v ground_n and_o rub_v betwixt_o the_o particle_n of_o the_o blood_n which_o be_v in_o motion_n and_o among_o which_o they_o be_v mix_v and_o the_o animal_n spirit_n be_v of_o a_o oily_a salino-sulphureous_a nature_n will_v consequent_o be_v expanded_a and_o rarify_v and_o put_v by_o that_o mean_n into_o a_o swift_a degree_n of_o motion_n be_v evident_a whether_o we_o consider_v the_o effect_n that_o solid_a or_o liquid_a substance_n have_v on_o one_o another_o when_o in_o motion_n for_o amber_n by_o a_o violent_a attrition_n of_o its_o part_n against_o a_o woollen_a cloth_n feel_v hot_a the_o sulphureous_a fat_a effluvium_n be_v by_o that_o attrition_n increase_v and_o cause_v to_o fly_v out_o in_o great_a quantity_n it_o be_v evident_a also_o by_o strike_v of_o a_o piece_n of_o flint_n against_o steel_n that_o the_o sulphureous_a particle_n of_o the_o flint_n be_v as_o if_o it_o be_v disyok_v from_o the_o embrace_n of_o the_o more_o firm_a and_o solid_a particle_n of_o the_o stone_n and_o be_v rub_v and_o grind_v betwixt_o they_o be_v put_v into_o a_o violent_a motion_n which_o cause_v they_o so_o much_o to_o rarify_v and_o expand_v that_o whenever_o they_o affect_v our_o sensory_a they_o cause_v that_o sensation_n we_o call_v heat_n which_o be_v according_o violent_a as_o their_o degree_n of_o motion_n be_v more_o or_o less_o intense_a and_o so_o amber_n by_o a_o mild_a attrition_n be_v moderate_o warm_a and_o by_o a_o violent_a more_o sensible_a again_o it_o be_v observable_a in_o the_o turn_n of_o any_o large_a and_o prove_v weighty_a wheel_n where_o the_o extraordinary_a weight_n make_v such_o a_o forcible_a pressure_n of_o those_o part_n that_o lie_v about_o the_o axletree_n that_o by_o strong_a and_o frequent_a attrition_n of_o the_o part_n together_o the_o crude_a sulphur_n which_o be_v fetter_v up_o in_o the_o substance_n of_o the_o wood_n be_v by_o degree_n loosen_a and_o dissolve_v and_o be_v put_v into_o motion_n be_v rarify_v and_o expanded_a which_o be_v still_o ground_n betwixt_o the_o solider_fw-la part_n of_o the_o wood_n its_o part_n be_v yet_o put_v into_o so_o strong_a a_o motion_n that_o they_o break_v and_o dissolve_v that_o solid_a substance_n and_o by_o create_v a_o flame_n consume_v and_o burn_v it_o in_o like_a manner_n the_o particle_n of_o fire_n be_v apply_v to_o gunpowder_n by_o dissolve_v and_o grind_n of_o its_o part_n in_o piece_n and_o put_v they_o into_o a_o violent_a motion_n cause_v they_o to_o expand_v and_o explode_v but_o not_o only_o solid_a body_n cause_n heat_n by_o particle_n grind_v of_o volatile_a sulphureous_a particle_n betwixt_o they_o and_o so_o by_o put_v they_o into_o motion_n but_o also_o the_o patticle_n of_o liquids_n by_o grind_v one_o upon_o another_o put_v themselves_o into_o so_o violent_a a_o motion_n as_o not_o only_o to_o cause_v heat_n but_o
inflame_v the_o blood_n of_o those_o that_o be_v of_o a_o tender_a and_o open_a constitution_n much_o soon_o than_o phlegmatic_a and_o melancholy_a peoples_n and_o as_o the_o former_a be_v evident_a in_o those_o that_o be_v subject_a to_o fever_n so_o the_o latter_a be_v not_o less_o remarkable_a in_o those_o of_o cold_a constitution_n for_o to_o increase_v the_o natural_a heat_n of_o their_o blood_n when_o it_o be_v too_o much_o depress_v it_o be_v not_o only_o necessary_a to_o take_v away_o some_o of_o those_o crude_a humour_n which_o stuff_n up_o the_o vessel_n and_o too_o much_o depress_v the_o spirit_n but_o also_o by_o volatile_a and_o spirituous_a medicine_n to_o increase_v the_o spirit_n and_o at_o the_o same_o time_n to_o exalt_v and_o spiritualise_v the_o blood_n by_o absorb_v acid_n and_o exalt_v the_o volitile_o and_o subtle_a part_n to_o render_v they_o predominant_a moreover_o that_o the_o animal_n spirit_n do_v not_o only_o according_a spirit_n to_o their_o different_a quantity_n and_o the_o different_a state_n of_o the_o blood_n various_o exagitate_v and_o increase_v the_o heat_n of_o it_o but_o also_o according_a to_o their_o different_a degree_n of_o activity_n and_o strength_n be_v put_v beyond_o dispute_n by_o the_o different_a effect_n that_o spirit_n of_o wine_n or_o aqua-mirabilis_a have_v upon_o we_o from_o sack_n which_o any_o one_o that_o do_v but_o taste_n must_v soon_o acknowledge_v it_o remain_v in_o the_o next_o place_n that_o i_o shall_v passive_a show_v how_o far_o the_o animal_n spirit_n be_v active_a and_o how_o far_o passive_a in_o cause_v these_o effect_n as_o well_o as_o the_o blood_n which_o evident_o appear_v from_o what_o i_o have_v already_o say_v for_o when_o the_o spirit_n and_o blood_n be_v forcible_o drive_v together_o than_o they_o seem_v to_o be_v mutual_o active_a and_o passive_a the_o spirit_n be_v force_v betwixt_o the_o particle_n of_o the_o blood_n and_o vice_n versâ_fw-la but_o the_o animal_n spirit_n be_v ground_n and_o rarify_v betwixt_o the_o particle_n of_o the_o blood_n be_v so_o far_o passive_a but_o be_v by_o that_o mean_v expanded_a by_o a_o powerful_a expansive_a and_o elastic_a motion_n exagitate_v the_o mass_n of_o blood_n and_o by_o that_o mean_n be_v active_a so_o that_o throughout_o the_o whole_a process_n it_o appear_v that_o neither_o of_o they_o single_o be_v altogether_o active_a or_o passive_a but_o both_o mutual_o and_o by_o turn_n from_o what_o i_o have_v say_v it_o appear_v how_o the_o continue_v heat_n of_o the_o blood_n be_v cause_v i_o shall_v in_o the_o next_o place_n proceed_v to_o show_v how_o it_o be_v continue_v which_o will_v be_v sufficient_o evident_a if_o we_o do_v but_o consider_v that_o the_o animal_n humour_n be_v in_o a_o constant_a and_o continual_a circulation_n for_o since_o all_o the_o blood_n in_o a_o man_n body_n be_v allow_v to_o circulate_v through_o the_o heart_n several_a time_n in_o a_o hour_n and_o that_o the_o blood_n from_o thence_o be_v continual_o force_v and_o disperse_v through_o the_o part_n of_o the_o body_n and_o so_o great_a a_o quantity_n of_o blood_n be_v at_o one_o pulsation_n lay_v down_o in_o the_o whole_a habit_n of_o the_o body_n and_o ferment_n at_o the_o same_o time_n with_o the_o animal_n spirit_n there_o must_v needs_o be_v raise_v in_o the_o blood_n a_o considerable_a heat_n or_o in_o other_o word_n the_o part_n of_o the_o blood_n and_o spirit_n must_v of_o necessity_n be_v put_v into_o so_o swift_a and_o intense_a a_o degree_n of_o motion_n as_o to_o enable_v they_o to_o produce_v a_o extraordinary_a heat_n when_o they_o strike_v upon_o our_o sensory_a the_o whole_a mass_n then_o circulate_v thus_o through_o the_o extremity_n of_o the_o vessel_n there_o be_v not_o only_o a_o great_a deal_n of_o blood_n ferment_v every_o pulsation_n but_o also_o by_o a_o continual_a succession_n of_o pulsation_n the_o blood_n be_v force_v into_o a_o fermentation_n by_o the_o expansive_a motion_n of_o the_o spirit_n be_v by_o that_o mean_v preserve_v in_o a_o constant_a and_o continual_a heat_n but_o i_o know_v here_o will_v some_o difficulty_n offer_v themselves_o and_o answer_v perhaps_o some_o may_v doubt_v whether_o the_o blood_n only_a ferment_n in_o the_o extremity_n of_o the_o vessel_n and_o not_o in_o the_o vessel_n themselves_o and_o since_o it_o be_v hot_a in_o the_o artery_n before_o it_o be_v lay_v down_o in_o the_o gland_n as_o well_o as_o in_o the_o vein_n after_o fermentation_n they_o may_v think_v it_o reasonable_a to_o conclude_v that_o wherever_o it_o ferment_n there_o it_o be_v fermentation_n be_v cause_v and_o because_o there_o be_v a_o great_a deal_n of_o blood_n betwixt_o their_o extremity_n and_o the_o large_a vessel_n they_o may_v think_v that_o the_o fermentation_n in_o the_o extremity_n can_v be_v the_o cause_n of_o the_o heat_n of_o the_o blood_n in_o the_o large_a vessel_n it_o be_v a_o old_a maxim_n that_o tolle_fw-la causam_fw-la tollitur_fw-la effectus_fw-la which_o be_v as_o much_o as_o to_o say_v the_o cause_n immediateley_o go_v before_o the_o effect_n another_o doubt_n which_o perhaps_o may_v arise_v will_v be_v that_o since_o i_o affirm_v that_o there_o be_v such_o a_o mutual_a action_n and_o passion_n in_o the_o attrition_n of_o these_o humour_n in_o order_n to_o a_o fermentation_n whether_o fermentation_n can_v be_v carry_v on_o in_o such_o a_o manner_n in_o so_o short_a a_o time_n as_o the_o quick_a circulation_n and_o consequent_o protrusion_n of_o the_o blood_n from_o the_o extremity_n of_o the_o vessel_n admit_v as_o to_o the_o first_o to_o wit_n whether_o the_o fermentation_n of_o the_o vessel_n blood_n be_v cause_v in_o the_o extremity_n of_o the_o vessel_n or_o the_o large_a one_o i_o affirm_v that_o it_o be_v chief_o and_o original_o cause_v in_o the_o extremity_n of_o the_o vessel_n just_o where_o the_o nerve_n and_o artery_n meet_v and_o where_o their_o content_n be_v first_o mix_v together_o and_o that_o the_o fermentation_n in_o the_o large_a vessel_n be_v but_o a_o continuation_n of_o the_o effect_n of_o the_o same_o original_a cause_n and_o as_o when_o water_n be_v heat_v over_o a_o fire_n that_o part_n of_o the_o water_n which_o be_v at_o the_o top_n of_o the_o vessel_n that_o contain_v it_o be_v as_o true_o say_v to_o receive_v its_o heat_n from_o the_o fire_n as_o that_o in_o the_o bottom_n so_o that_o blood_n which_o be_v in_o the_o body_n of_o the_o vena_fw-la cava_fw-la be_v as_o real_o put_v into_o a_o fermentation_n by_o a_o mixture_n of_o spirit_n as_o that_o in_o the_o extremity_n for_o the_o animal_n spirit_n be_v mix_v with_o the_o arterial_a blood_n in_o the_o gland_n and_o ground_n betwixt_o their_o particle_n and_o be_v by_o that_o mean_v put_v into_o a_o elastic_a and_o expansive_a motion_n they_o powerful_o ferment_n and_o exagitate_v the_o whole_a mass_n this_o blood_n then_o so_o ferment_v be_v thrust_v out_o of_o the_o gland_n by_o a_o succession_n of_o matter_n force_v in_o the_o next_o pulsation_n and_o so_o forward_o by_o the_o next_o successive_o till_o it_o be_v drive_v into_o the_o vena_fw-la cava_fw-la now_o as_o soon_o as_o it_o be_v thrust_v out_o of_o the_o gland_n those_o spirit_n which_o do_v so_o powerful_o expand_v before_o and_o the_o remain_a part_n of_o they_o which_o be_v not_o mix_v with_o that_o subtle_a liquor_n that_o circulate_v through_o the_o fibre_n be_v yet_o further_o corrode_v and_o exagitated_a by_o pulsation_n still_o continue_v to_o expand_v themselves_o and_o by_o that_o mean_n keep_v the_o blood_n in_o a_o continual_a heat_n and_o the_o animal_n spirit_n be_v yet_o more_o expanded_a do_v not_o only_o continue_v but_o in_o a_o great_a measure_n increase_v the_o heat_n of_o it_o but_o these_o spirit_n be_v frequent_o oppose_v decay_v in_o their_o expansion_n by_o strike_v against_o the_o blood_n loose_a in_o a_o short_a time_n a_o great_a deal_n of_o their_o vigour_n the_o particle_n that_o before_o ground_fw-mi the_o animal_n spirit_n betwixt_o they_o obstruct_v their_o motion_n and_o the_o animal_n spirit_n not_o be_v able_a any_o long_o to_o keep_v they_o in_o a_o just_a motion_n sufficient_a to_o continue_v the_o heat_n which_o be_v natural_a to_o human_a blood_n they_o be_v as_o if_o it_o be_v link_v and_o fetter_v up_o betwixt_o those_o grosser_n part_n &_o be_v incorporate_v into_o one_o substance_n with_o they_o which_o be_v the_o reason_n that_o the_o blood_n by_o frequent_a circulation_n be_v ripen_v and_o digest_v and_o for_o this_o reason_n the_o flesh_n of_o a_o hare_n grow_v tender_a by_o be_v course_v along_o time_n the_o blood_n be_v thus_o impregnate_v with_o animal_n spirit_n and_o by_o that_o mean_n want_v spirit_n in_o a_o free_a and_o strong_a motion_n will_v by_o degree_n grow_v cold_a but_o the_o interval_n of_o time_n while_o the_o blood_n move_v from_o the_o extremity_n of_o the_o vessel_n to_o
the_o same_o manner_n when_o saline_n corrosive_n be_v mix_v together_o the_o subtle_a effluvia_fw-la of_o each_o first_o begin_v powerful_o to_o oppose_v one_o another_o and_o be_v by_o that_o mean_v reverberate_v and_o strike_v back_o upon_o the_o particle_n of_o those_o body_n of_o which_o they_o be_v the_o effluvia_fw-la put_v they_o into_o motion_n and_o as_o the_o motion_n so_o begin_v grow_v strong_a and_o more_o violent_a so_o the_o degree_n of_o heat_n become_v more_o intense_a and_o when_o a_o flame_n be_v apply_v to_o any_o sulphureous_a body_n the_o particle_n of_o that_o flame_n be_v forcible_o agitate_a against_o the_o sulphur_n put_v the_o particle_n of_o it_o into_o a_o brisk_a and_o swift_a motion_n and_o they_o be_v by_o that_o mean_v rarify_v and_o expanded_a be_v turn_v into_o flame_n last_o it_o can_v be_v deny_v but_o that_o when_o any_o thing_n grow_v hot_a by_o putrefaction_n that_o heat_n either_o proceed_v from_o elastic_a and_o fermentative_a particle_n 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continual_a access_n of_o air._n second_o a_o fresh_a supply_n of_o a_o constant_a sulphureous_a pabulum_fw-la three_o a_o perpetual_a avolition_n of_o fuliginous_a recrement_n he_o conclude_v that_o it_o must_v needs_o be_v keep_v hot_a by_o a_o continual_a sort_n of_o flame_n but_o he_o may_v as_o well_o say_v that_o water_n over_o a_o fire_n can_v not_o flame_n become_v hot_a except_o it_o be_v put_v into_o a_o flame_n as_o that_o the_o mass_n of_o blood_n can_v grow_v hot_a without_o accension_n but_o since_o every_o body_n know_v that_o hot_a water_n be_v not_o flame_n there_o be_v no_o doubt_n but_o that_o blood_n may_v be_v hot_a without_o accension_n too_o that_o to_o produce_v heat_n there_o be_v no_o need_n of_o a_o flame_n to_o be_v always_o accend_v be_v evident_a since_o there_o be_v several_a degree_n of_o hot_a body_n in_o which_o no_o flame_n at_o all_o be_v apparent_a and_o even_o blood_n itself_o immediate_o as_o soon_o as_o it_o be_v extravasated_a seem_v so_o unlikely_a pabulum_fw-la for_o a_o flame_n that_o water_n will_v not_o soon_o extinguish_v it_o but_o to_o produce_v several_a degree_n of_o heat_n in_o liquids_n it_o be_v sufficient_a the_o particle_n of_o those_o body_n that_o so_o affect_v our_o sense_n be_v put_v into_o a_o swift_a motion_n although_o not_o into_o so_o high_a a_o degree_n as_o to_o make_v a_o flame_n so_o by_o rub_v of_o two_o flint-stone_n together_o moderate_o be_v produce_v a_o evident_a heat_n and_o when_o they_o be_v move_v against_o one_o another_o more_o violent_o the_o heat_n be_v strong_a and_o by_o a_o collision_n yet_o more_o violent_a those_o sulphureous_a particle_n that_o before_o cause_v a_o gentle_a heat_n constitute_v a_o flame_n he_o say_v that_o a_o flame_n may_v be_v continue_v it_o shall_v always_o have_v a_o free_a access_n of_o air_n for_o all_o sublunary_a fire_n and_o especial_o flame_n be_v compose_v of_o sulphureous_a particle_n break_v out_o of_o the_o combustible_a matter_n and_o of_o nitrous_a particle_n which_o always_o abound_v in_o the_o air_n and_o these_o nitrous_a particle_n he_o say_v be_v so_o necessary_a to_o the_o production_n of_o flame_n that_o in_o the_o summer_n if_o the_o sun_n do_v but_o shine_v upon_o the_o fire_n by_o drive_v it_o back_o and_o dissipate_v the_o nitre_n it_o extinguish_v it_o whereas_o on_o the_o contrary_a if_o it_o be_v supply_v with_o a_o sufficient_a quantity_n it_o burn_v more_o clear_a and_o brisk_a indeed_o it_o be_v so_o manifest_o certain_a that_o fire_n burn_v brisk_a and_o flame_n fierce_a when_o it_o have_v a_o sufficient_a quantity_n of_o nitre_n about_o it_o than_o when_o it_o have_v not_o that_o to_o contradict_v it_o will_v be_v to_o deny_v what_o be_v sensible_o apparent_a but_o yet_o it_o do_v not_o therefore_o follow_v that_o nitre_n make_v up_o part_n of_o the_o flame_n for_o sulphur_n and_o oil_n will_v flame_v as_o violent_o in_o the_o summer_n as_o in_o the_o winter_n though_o wood_n and_o coal_n and_o other_o combustible_a matter_n will_v not_o beside_o if_o nitre_n make_v any_o part_n of_o the_o flame_n though_o it_o may_v ready_o mix_v with_o the_o outward_a side_n of_o it_o i_o will_v willing_o understand_v how_o when_o a_o flame_n be_v two_o or_o three_o yard_n diameter_n it_o be_v possible_a for_o it_o to_o be_v mix_v with_o the_o middle_n of_o the_o flame_n which_o we_o perceive_v be_v more_o violent_a than_o the_o border_n of_o it_o where_o nitre_n abound_v but_o the_o reason_n why_o flame_n will_v not_o burn_v without_o some_o degree_n soon_o of_o nitre_n be_v not_o that_o it_o make_v up_o any_o part_n of_o it_o but_o because_o the_o particle_n of_o fire_n be_v in_o so_o very_o swift_a and_o violent_a a_o motion_n that_o they_o will_v immediate_o be_v disperse_v and_o fly_v away_o if_o the_o nitrous_a particle_n of_o the_o air_n do_v not_o prevent_v they_o by_o close_v round_o about_o they_o and_o keep_v they_o up_o to_o a_o centre_n by_o which_o mean_v flame_n be_v not_o only_o make_v of_o a_o long_a continuance_n but_o it_o be_v power_n of_o heat_n we_o be_v more_o violent_a those_o move_a particle_n be_v reverberate_v and_o work_v mutual_o on_o one_o another_o so_o as_o to_o increase_v their_o motion_n and_o consequent_o their_o effect_n and_o as_o the_o ray_n of_o the_o sun_n collect_v into_o a_o point_n by_o a_o burning-glass_n make_v they_o more_o violent_a so_o do_v the_o nitrous_a particle_n enerease_v the_o vigour_n of_o the_o flame_n and_o again_o as_o bank_n cast_v up_o about_o a_o spring_n prevent_v the_o water_n from_o stream_v away_o till_o a_o great_a quantity_n be_v gather_v together_o and_o it_o break_v out_o violent_o so_o be_v the_o particle_n of_o the_o fire_n heap_v up_o and_o keep_v in_o till_o their_o motion_n over-power_n the_o pressure_n of_o the_o nitre_n but_o nitre_n do_v not_o only_o by_o reverberate_v the_o ray_n collect_v
a_o great_a number_n together_o and_o by_o that_o mean_n increase_v their_o vigour_n but_o also_o by_o invert_v their_o motion_n turn_v they_o back_o again_o upon_o and_o cause_v they_o by_o strike_v against_o the_o combustible_a matter_n to_o dissolve_v and_o put_v the_o particle_n of_o it_o into_o motion_n soon_o wherefore_o it_o burn_v more_o brisk_o and_o be_v consume_v in_o less_o time_n and_o this_o be_v the_o reason_n that_o fire_n burn_v better_a in_o the_o winter_n summer_n than_o the_o summer_n for_o in_o the_o summer_n for_o want_v of_o a_o close_a condense_a nitrous_a air_n to_o bind_v up_o and_o collect_v the_o particle_n of_o fire_n they_o be_v dissipate_v and_o scatter_v immediate_o but_o in_o the_o winter_n be_v as_o if_o it_o be_v yoke_v and_o lock_v up_o together_o they_o affect_v our_o sense_n more_o vigorous_o to_o prove_v that_o nitre_n be_v part_n of_o the_o pabulum_fw-la of_o flame_n air._n he_o instance_n a_o experiment_n from_o the_o famous_a mr._n robert_n boyl_n viz._n that_o a_o light_a candle_n be_v put_v into_o a_o large_a glass-globe_n and_o the_o globe_n be_v stop_v as_o soon_o as_o the_o air_n be_v suck_v out_o the_o flame_n expire_v but_o this_o be_v so_o far_o from_o prove_v that_o the_o air_n be_v part_n of_o the_o pabulum_fw-la of_o fire_n that_o it_o be_v the_o strong_a proof_n of_o what_o i_o just_a now_o say_v for_o as_o long_o as_o the_o particle_n of_o the_o air_n close_v about_o the_o candle_n keep_v all_o the_o ray_n together_o and_o by_o invert_v their_o motion_n cause_v they_o to_o turn_v upon_o the_o fat_a that_o they_o may_v by_o dissolve_v of_o it_o and_o put_v its_o part_n into_o motion_n turn_v it_o into_o flame_n so_o long_o it_o burn_v but_o as_o soon_o as_o the_o nitre_n be_v exhaust_v the_o ray_n be_v immediate_o disperse_v and_o scatter_v by_o their_o own_o agility_n fly_v away_o from_o and_o cease_v to_o convert_v the_o remain_a part_n of_o the_o fat_a into_o flame_n and_o that_o which_o make_v more_o for_o what_o i_o have_v say_v be_v that_o as_o the_o air_n be_v gradual_o draw_v out_o so_o the_o flame_n be_v gradual_o diminish_v for_o when_o there_o be_v less_o nitre_n to_o oppose_v the_o motion_n of_o the_o ray_n they_o be_v soon_o disperse_v and_o the_o nitre_n by_o give_v they_o that_o liberty_n leave_v less_o flame_n about_o the_o candle_n he_o say_v further_a as_o flame_n be_v extingush_v by_o take_v away_o the_o consider_v nitrous_a pabulum_fw-la of_o it_o so_o when_o the_o breath_n of_o a_o animal_n be_v stop_v it_o die_v not_o so_o much_o because_o it_o be_v choke_v by_o a_o retention_n of_o fuliginous_a recrement_n as_o by_o rob_v the_o blood_n of_o the_o nitrous_a pabulum_fw-la how_o a_o animal_n come_v to_o die_v by_o stope_a respiration_n i_o shall_v hereafter_o give_v a_o account_n when_o i_o speak_v concern_v the_o use_n of_o the_o lung_n in_o the_o mean_a time_n i_o shall_v here_o make_v it_o evident_a that_o the_o nitre_n of_o the_o air_n be_v so_o far_o from_o promote_a the_o heat_n of_o the_o blood_n that_o the_o less_o nitrous_a the_o air_n be_v the_o hot_a it_o grow_v this_o be_v sufficient_o manifest_a depress_n if_o we_o do_v but_o take_v our_o breath_n through_o a_o warm_a woollen_a cloth_n which_o imbibe_v as_o if_o it_o be_v the_o nitre_n for_o we_o shall_v be_v so_o far_o from_o be_v cool_a for_o it_o that_o in_o warm_a wether_n when_o our_o body_n be_v a_o little_a predisposed_a it_o cause_v we_o to_o sweat_v whereas_o if_o nitre_n promote_v the_o heat_n of_o the_o blood_n we_o shall_v rather_o be_v cold_a the_o flame_n of_o the_o blood_n according_a to_o he_o be_v extinguish_v for_o want_n of_o a_o supply_n of_o nitrous_a pabulum_fw-la but_o although_o this_o will_v not_o be_v a_o sufficient_a argument_n to_o convince_v we_o yet_o a_o cold_a winter_n and_o a_o hot_a summer_n will_v be_v argument_n strong_a enough_o for_o we_o always_o find_v that_o in_o the_o winter_n when_o the_o air_n be_v full_a of_o nitre_n we_o be_v much_o more_o cold_a then_o in_o the_o summer_n when_o in_o the_o heat_n of_o the_o sun_n we_o want_v that_o supply_n of_o nitre_n from_o whence_o it_o sufficient_o appear_v that_o nitre_n do_v not_o contribute_v to_o the_o heat_n of_o the_o blood_n but_o rather_o depress_n it_o neither_o in_o liquids_n be_v there_o away_o any_o accension_n as_o there_o be_v in_o flame_n for_o nitre_n to_o lock_v up_o and_o keep_v the_o heat_n from_o disperse_v for_o water_n will_v be_v hot_a though_o it_o be_v place_v in_o the_o middle_a of_o a_o fire_n where_o no_o nitre_n can_v come_v near_o it_o the_o particle_n which_o make_v up_o that_o liquid_a substance_n be_v sufficient_a to_o reserve_v those_o particle_n of_o matter_n which_o cause_n heat_v upon_o our_o sensory_a from_o fly_v away_o so_o soon_o by_o entangle_v and_o fetter_n they_o up_o the_o second_o pabulum_fw-la thing_n that_o he_o say_v be_v requisite_a to_o preserve_v heat_n be_v a_o continual_a supply_n of_o sulphur_n that_o flame_n can_v be_v continue_v without_o a_o supply_n of_o combustible_a matter_n i_o do_v not_o deny_v yet_o we_o be_v certain_a that_o blood_n may_v grow_v hot_a without_o such_o pabulum_fw-la for_o the_o blood_n of_o horse_n and_o other_o beast_n be_v so_o far_o from_o be_v supply_v with_o a_o sulphureous_a pabulum_fw-la that_o nothing_o be_v less_o combustible_a than_o grass_n and_o water_n which_o be_v their_o constant_a food_n and_o which_o have_v different_a effect_n upon_o our_o sense_n from_o sulphur_n and_o the_o daily_a food_n we_o eat_v be_v so_o far_o from_o kindle_v a_o flame_n that_o it_o will_v present_o extinguish_v it_o the_o three_o and_o consider_v last_o thing_n he_o suppose_v requisite_a to_o continue_v a_o flame_n be_v that_o the_o fuliginous_a recrement_n be_v carry_v of_o and_o as_o flame_n require_v a_o continual_a avolition_n of_o its_o recrement_n so_o do_v the_o blood_n by_o the_o branch_n of_o the_o trachea_n and_o the_o pore_n of_o the_o body_n that_o smoke_n inconsistent_a and_o flame_n be_v as_o if_o it_o be_v inseparable_o join_v together_o and_o that_o a_o subacid_a balsamic_n juice_n continual_o sweat_v through_o the_o inward_a coat_n of_o the_o trachea_n and_o a_o saltish_a serum_n through_o the_o pore_n of_o the_o skin_n be_v most_o certain_a but_o in_o the_o carry_v on_o of_o each_o of_o these_o phaenomena_n there_o be_v a_o very_a wide_a difference_n for_o in_o a_o recrementitious_a animal_n that_o sub-acid_a balsamic_a juice_n which_o sweat_v through_o the_o inward_a coat_n of_o the_o trachea_n be_v design_v to_o moisten_v the_o cavity_n of_o it_o to_o prevent_v they_o from_o dry_v and_o become_v useless_a and_o partly_o to_o preserve_v they_o from_o the_o sharpness_n of_o the_o nitrous_a particle_n of_o the_o air_n and_o in_o like_a manner_n the_o skin_n be_v continual_o water_v with_o that_o serum_n to_o preserve_v it_o from_o wither_v and_o become_v too_o dry_a and_o though_o these_o humour_n be_v not_o suck_v up_o again_o into_o the_o blood_n yet_o that_o be_v not_o because_o they_o be_v fuliginous_a recrement_n and_o useless_a part_n of_o the_o serum_n of_o the_o blood_n but_o because_o since_o those_o part_n must_v needs_o be_v keep_v from_o dry_v it_o will_v be_v impossible_a for_o vessel_n to_o be_v so_o frame_v as_o to_o receive_v and_o return_v they_o to_o the_o mass_n of_o blood_n again_o for_o the_o outward_a side_n of_o those_o vessel_n will_v still_o be_v dry_a and_o want_v effluvium_n to_o moisten_v they_o ad_fw-la recrement_n infinitum_fw-la but_o the_o fuliginous_a effluvium_n of_o fire_n be_v altogether_o recrement_n and_o useless_a in_o respect_n of_o fire_n beside_o the_o effluvium_n of_o the_o mass_n of_o blood_n it_o if_o stop_v be_v so_o far_o from_o depress_v and_o diminish_v the_o heat_n of_o the_o blood_n that_o they_o increase_v it_o so_o much_o that_o they_o present_o put_v those_o that_o have_v predisposed_a blood_n into_o violent_a fever_n but_o if_o the_o smoke_n fire_n of_o a_o fire_n or_o of_o a_o candle_n be_v reflect_v upon_o the_o flame_n it_o be_v present_o extinguish_v but_o it_o be_v a_o question_n whether_o smoak_n be_v flame_n altogether_o a_o effluvium_fw-la of_o fire_n whereas_o no_o body_n doubt_n but_o that_o the_o moisture_n which_o supply_v the_o lung_n and_o insensible_a transpiration_n be_v separate_v from_o the_o serum_n of_o the_o blood_n for_o smoak_n as_o i_o conceive_v be_v make_v up_o of_o the_o nitre_n of_o the_o air_n fix_v the_o particle_n of_o the_o flame_n together_o with_o the_o ash_n of_o the_o fuel_n that_o be_v raise_v and_o force_v up_o by_o the_o quick_a and_o violent_a motion_n of_o the_o fire_n which_o i_o believe_v be_v carry_v on_o after_o this_o manner_n the_o particle_n of_o the_o fire_n be_v in_o a_o very_a compound_v brisk_a and_o violent_a
motion_n endeavour_n to_o expand_v and_o powerful_o to_o fly_v away_o from_o the_o fuel_n that_o supply_v they_o but_o the_o nitre_n of_o the_o air_n strong_o oppose_v they_o partly_o press_v they_o back_o till_o their_o motion_n be_v increase_v and_o more_o intense_a they_o violent_o scatter_v themselves_o in_o the_o ambient_fw-la air_n both_o among_o the_o dust_n and_o ash_n of_o the_o fuel_n hurry_v along_o with_o they_o by_o their_o motion_n and_o the_o particle_n of_o nitre_n by_o which_o mean_n they_o lose_v most_o of_o their_o vigour_n and_o be_v more_o easy_o overpower_v by_o the_o nitre_n and_o be_v fix_v and_o join_v with_o those_o ash_n make_v up_o that_o which_o we_o call_v soot_n which_o the_o long_o it_o lie_v together_o grow_v more_o bitter_a the_o sulphureous_a particle_n of_o the_o fix_a flame_n be_v by_o a_o intestine_a sort_n of_o motion_n exalt_v and_o overpower_v the_o more_o dull_a and_o effete_a part_n of_o matter_n from_o whence_o it_o appear_v that_o soot_n be_v not_o altogether_o a_o recrement_n of_o fire_n but_o be_v make_v up_o of_o effete_a ash_n fire_n and_o nitre_n but_o though_o soot_n be_v whole_o a_o recrement_n of_o fire_n yet_o it_o do_v not_o follow_v that_o that_o moisture_n which_o supply_v the_o lung_n be_v a_o recrement_n of_o the_o blood_n though_o it_o be_v to_o be_v call_v a_o recrement_n for_o it_o be_v separate_v as_o a_o part_n of_o the_o serum_n and_o lympha_fw-la and_o not_o of_o the_o blood_n from_o what_o i_o have_v say_v i_o think_v it_o plain_o appear_v that_o neither_o the_o simile_n he_o use_v be_v in_o any_o considerable_a circumstance_n agreeable_a nor_o can_v he_o from_o thence_o deduce_v the_o reason_n of_o the_o heat_n of_o the_o blood_n and_o be_v lead_v as_o if_o it_o be_v by_o a_o necessity_n in_o answer_n to_o his_o opinion_n to_o consider_v the_o nature_n of_o flame_n and_o the_o manner_n of_o its_o production_n more_o than_o i_o otherwise_o shall_v have_v do_v i_o shall_v beg_v leave_n descend_v to_o make_v a_o small_a digression_n here_o which_o though_o it_o may_v seem_v foreign_a to_o a_o discourse_n of_o the_o heat_n of_o the_o blood_n yet_o it_o may_v not_o be_v improper_a after_o what_o i_o have_v already_o say_v of_o fire_n to_o endeavour_v to_o give_v a_o reason_n why_o flame_n when_o it_o be_v leave_v to_o its_o own_o liberty_n always_o ascend_v to_o understand_v then_o the_o reason_n why_o flame_n always_o ascend_v we_o must_v again_o remember_v that_o fire_n be_v for_o as_o much_o as_o appear_v to_o our_o sense_n or_o reason_n a_o light_n rarify_v body_n who_o minute_n and_o subtle_a particle_n be_v in_o a_o swift_a motion_n and_o in_o some_o measure_n pin_v in_o by_o the_o ambient_fw-la air._n now_o though_o the_o ambient_fw-la air_n thus_o press_v way_n upon_o it_o on_o every_o side_n yet_o the_o particle_n of_o flame_n be_v in_o too_o strong_a a_o motion_n and_o also_o too_o subtle_a to_o be_v total_o resist_v and_o altogether_o confine_v must_v needs_o break_v out_o that_o way_n which_o it_o force_v most_o easy_o and_o where_o it_o be_v least_o powerful_o resist_v that_o flame_n be_v only_o a_o rarefy_v body_n in_o swift_a motion_n i_o take_v for_o grant_v and_o that_o it_o be_v press_v upon_o on_o every_o side_n by_o air_n none_o sure_o will_v deny_v and_o it_o must_v needs_o be_v most_o reasonable_a for_o we_o to_o believe_v that_o it_o will_v be_v subject_a to_o spread_v and_o expand_v itself_o that_o way_n it_o find_v the_o least_o resistance_n therefore_o all_o that_o i_o need_v to_o prove_v be_v that_o flame_n expose_v to_o the_o open_a air_n find_v less_o resistance_n in_o ascend_v then_o descend_v that_o flame_n find_v less_o resistance_n in_o ascend_v then_o descend_v will_v easy_o be_v prove_v if_o we_o will_v but_o allow_v what_o be_v beyond_o contradiction_n viz._n that_o the_o more_o solid_a and_o compress_v any_o body_n be_v the_o more_o powerful_o it_o repel_v those_o body_n that_o move_v against_o it_o which_o plain_o appear_v if_o we_o strike_v two_o piece_n of_o mettle_n together_o viz._n lead_v and_o iron_n for_o at_o the_o same_o time_n that_o lead_v easy_o yield_v to_o the_o impression_n of_o the_o iron_n it_o as_o powerful_o resist_v the_o former_a if_o then_o the_o air_n the_o near_a it_o be_v to_o the_o centre_n above_o be_v more_o solid_a and_o firm_a consequent_o it_o will_v resist_v the_o motion_n of_o body_n that_o strike_v against_o it_o with_o great_a vigour_n and_o when_o the_o particle_n of_o flame_n be_v forcible_o drive_v against_o it_o they_o be_v more_o strong_o resist_v by_o that_o air_n which_o be_v below_o than_o the_o air_n above_o with_o less_o difficulty_n make_v way_n for_o themselves_o upward_o and_o so_o ascend_v that_o the_o air_n the_o near_a it_o be_v to_o the_o centre_n be_v thick_a and_o more_o compact_a consequent_o will_v be_v able_a to_o resist_v the_o notion_n of_o the_o flame_n we_o have_v a_o great_a deal_n of_o reason_n to_o believe_v if_o we_o consider_v what_o a_o vast_a and_o unaccountable_a weight_n of_o incumbent_a air_n press_v upon_o it_o for_o as_o in_o a_o pillar_n of_o stone_n the_o near_a to_o the_o foundation_n the_o hard_a it_o be_v to_o force_v a_o stone_n out_o of_o it_o because_o it_o be_v hold_v fast_o by_o the_o weight_n of_o those_o that_o lie_v upon_o it_o so_o we_o must_v needs_o conceive_v that_o those_o particle_n of_o air_n next_o the_o centre_n will_v be_v make_v more_o compact_a and_o able_a to_o resist_v the_o flame_n by_o the_o weight_n of_o those_o that_o lie_v upon_o they_o but_o to_o prove_v it_o more_o evident_o experiment_n viz._n that_o the_o air_n next_o to_o the_o centre_n make_v a_o strong_a resistance_n i_o shall_v produce_v a_o common_a yet_o very_o remarkable_a experiment_n which_o be_v this_o if_o a_o bladder_n be_v blow_v full_a of_o air_n at_o the_o bottom_n of_o the_o mountain_n teneriff_n and_o be_v carry_v up_o to_o the_o top_n of_o that_o hill_n it_o will_v present_o burst_v the_o reason_n of_o which_o be_v plain_o this_o a_o great_a quantity_n of_o air_n at_o the_o bottom_n of_o the_o hill_n be_v press_v and_o squeze_v close_o together_o by_o the_o weight_n of_o all_o that_o condense_a air_n that_o lie_v upon_o it_o the_o spring_n of_o it_o be_v by_o that_o mean_n as_o if_o it_o be_v wind_v up_o and_o make_v more_o compact_a as_o soon_o as_o that_o weight_n be_v want_v to_o keep_v they_o close_o together_o at_o the_o top_n they_o fly_v open_a and_o expand_v themselves_o to_o a_o more_o lax_n and_o open_a constitution_n of_o part_n which_o reason_n be_v confirm_v by_o another_o experiment_n viz._n by_o blow_v a_o bladder_n full_a of_o air_n at_o the_o top_n of_o the_o same_o mountain_n for_o as_o it_o be_v bring_v down_o to_o the_o bottom_n of_o the_o hill_n it_o gradual_o subside_v and_o though_o it_o be_v as_o full_a as_o it_o can_v be_v blow_v at_o the_o top_n of_o the_o hill_n yet_o at_o the_o bottom_n it_o will_v seem_v not_o near_o full_o distend_v the_o spring_n of_o the_o air_n that_o be_v above_o expanded_a be_v now_o press_v together_o by_o the_o weight_n of_o the_o air_n above_o it_o another_o observation_n which_o i_o shall_v bring_v for_o gunpowder_n a_o confirmation_n of_o it_o be_v that_o a_o musket_n shoot_v off_o at_o the_o top_n of_o that_o hill_n make_v no_o considerable_a noise_n compare_v with_o the_o sound_v it_o cause_v at_o the_o bottom_n the_o reason_n of_o which_o difference_n can_v be_v no_o other_o but_o this_o that_o the_o air_n be_v more_o compact_a and_o solid_a below_o cause_v the_o collision_n of_o the_o small_a particle_n of_o matter_n to_o be_v more_o violent_a by_o a_o strong_a opposition_n and_o consequent_o the_o sound_n be_v by_o that_o mean_n loud_o beside_o the_o particle_n of_o expanded_a gunpower_v fly_v away_o and_o dissipate_v themselves_o a_o great_a deal_n more_o easy_o above_o then_o below_o which_o confirm_v what_o i_o have_v say_v before_o of_o the_o reason_n why_o nitre_n be_v beneficial_a to_o the_o maintanance_n of_o flame_n for_o if_o the_o air_n when_o it_o be_v more_o condense_a bind_v up_o and_o cause_v the_o particle_n of_o fire_n to_o work_v more_o powerful_o upon_o one_o another_o and_o by_o that_o mean_v a_o strong_a collision_n of_o particle_n and_o if_o when_o it_o be_v less_o condense_a it_o more_o easy_o yield_v to_o they_o and_o give_v they_o liberty_n to_o fly_v away_o with_o less_o resistance_n it_o must_v needs_o be_v grant_v that_o the_o office_n it_o perform_v here_o below_o in_o respect_n of_o flame_n be_v to_o keep_v its_o part_n from_o fly_v away_o too_o easy_o but_o for_o a_o further_a proof_n and_o confirmation_n of_o the_o reason_n i_o have_v give_v why_o flame_n fly_v upward_o viz._n because_o the_o air_n yield_v
the_o heart_n and_o from_o the_o heart_n to_o the_o extremity_n of_o the_o vessel_n again_o be_v very_o short_a before_o there_o can_v be_v any_o sensible_a or_o considerable_a decay_n of_o it_o the_o blood_n be_v anew_o ferment_v in_o the_o gland_n and_o so_o by_o a_o continual_a circulation_n the_o heat_n of_o the_o blood_n be_v preserve_v and_o because_o by_o this_o time_n the_o animal_n spirit_n mix_v in_o the_o first_o fermentation_n with_o the_o blood_n be_v almost_o spend_v be_v incorporate_v with_o it_o and_o because_o part_v of_o it_o be_v continual_o separate_v in_o the_o brain_n it_o meet_v a_o second_o time_n with_o new_a supply_n and_o also_o by_o repeat_v fermentation_n be_v more_o impregnate_v with_o spirit_n as_o well_o as_o digest_v and_o ripen_v to_o a_o high_a degree_n of_o maturity_n thus_o i_o have_v give_v a_o account_n how_o the_o heat_n of_o the_o blood_n be_v carry_v on_o in_o the_o vessel_n that_o it_o may_v more_o clear_o appear_v how_o the_o original_a cause_n of_o heat_n be_v principal_o in_o the_o gland_n that_o the_o animal_n spirit_n be_v put_v into_o a_o elastic_a prove_v motion_n in_o the_o gland_n i_o have_v before_o prove_v by_o the_o grosser_n particle_n of_o the_o blood_n and_o that_o the_o blood_n so_o ferment_v be_v successive_o cast_v out_o into_o the_o vein_n be_v plain_a enough_o to_o any_o one_o that_o do_v but_o understand_v circulation_n to_o prove_v then_o that_o the_o blood_n be_v thrust_v out_o of_o the_o gland_n do_v by_o a_o further_a expansion_n of_o those_o spirit_n for_o a_o while_n increase_v the_o fermentation_n and_o that_o when_o the_o vigour_n of_o the_o spirit_n be_v spend_v it_o will_v gradual_o decay_v we_o need_v but_o take_v notice_n how_o fermentation_n be_v begin_v and_o carry_v on_o in_o other_o liquor_n for_o when_o oil_n of_o vitriol_n and_o spirit_n of_o ammoniac_a salt_n be_v mix_v together_o the_o part_n of_o each_o be_v in_o some_o measure_n mix_v and_o put_v into_o motion_n by_o drop_v the_o one_o into_o the_o other_o they_o present_o begin_v to_o ferment_n which_o fermentation_n be_v gradual_o exalt_v till_o by_o a_o frequent_a collision_n and_o attrition_n the_o most_o fermentative_a part_n fly_v away_o or_o their_o vigour_n be_v lose_v and_o then_o fermentation_n gradual_o decrease_v and_o in_o like_a manner_n all_o other_o liquor_n that_o for_o a_o time_n ferment_n with_o a_o sensible_a heat_n but_o if_o possible_a it_o will_v further_o appear_v that_o the_o original_a &_o principal_a cause_n of_o fermentation_n be_v in_o the_o gland_n if_o we_o do_v but_o consider_v how_o fermentation_n be_v carry_v on_o in_o a_o die_a body_n for_o in_o a_o body_n that_o be_v about_o to_o die_v the_o vigour_n as_o well_o as_o dead_a quantity_n of_o animal_n spirit_n be_v diminish_v and_o those_o too_o be_v less_o vigorous_o ground_n betwixt_o the_o part_n of_o the_o arterial_a blood_n expand_v so_o weak_o that_o they_o scarce_o agitate_v the_o mass_n of_o blood_n sufficient_o to_o preserve_v its_o heat_n but_o as_o soon_o as_o the_o blood_n and_o spirit_n cease_v to_o circulate_v the_o heat_n of_o the_o blood_n present_o grow_v mild_a till_o at_o last_o it_o be_v quite_o extinguish_v now_o if_o when_o the_o fermentation_n be_v weak_a the_o heat_n of_o the_o blood_n be_v more_o remiss_a and_o depress_v and_o when_o circulation_n be_v stop_v it_o consequent_o cease_v it_o must_v needs_o follow_v that_o the_o animal_n spirit_n be_v the_o cause_n of_o that_o fermentation_n and_o that_o it_o be_v promote_v by_o drive_v those_o two_o liquor_n forcible_o together_o and_o that_o the_o fermentation_n be_v chief_o cause_v in_o the_o gland_n be_v plain_a because_o when_o the_o spirit_n and_o blood_n cease_v to_o be_v drive_v together_o and_o there_o ferment_v the_o heat_n of_o the_o blood_n decrease_v and_o that_o it_o be_v not_o in_o the_o vessel_n be_v evident_a because_o after_o circulation_n be_v stop_v it_o present_o decline_v whereas_o if_o it_o be_v cause_v in_o the_o vessel_n it_o will_v continue_v after_o death_n as_o well_o as_o before_o since_o it_o than_o have_v the_o same_o matter_n though_o it_o want_v circulation_n and_o a_o forcible_a mixture_n and_o what_o i_o have_v show_v to_o be_v the_o consequence_n of_o it_o i_o shall_v only_o bring_v one_o argument_n more_o to_o prove_v that_o the_o attrition_n heat_n of_o the_o blood_n depend_v upon_o the_o attrition_n and_o fermentation_n in_o the_o glandule_n which_o may_v be_v infer_v from_o this_o common_a observation_n that_o the_o heat_n of_o the_o blood_n be_v increase_v by_o all_o violent_a motion_n for_o upon_o all_o violent_a motion_n a_o large_a quantity_n of_o animal_n spirit_n be_v send_v to_o the_o part_n to_o be_v move_v in_o order_n to_o prepare_v a_o great_a quantity_n of_o subtle_a liquor_n to_o distend_a and_o dilate_v the_o fibre_n the_o fermentation_n be_v not_o only_o raise_v high_a in_o the_o glandule_n but_o the_o motion_n of_o the_o heart_n be_v thus_o accidental_o increase_v quicken_v the_o circulation_n of_o the_o blood_n so_o much_o that_o before_o the_o vigorous_a motion_n of_o its_o part_n which_o be_v raise_v in_o the_o precedent_a fermentation_n be_v spend_v it_o be_v again_o renew_a but_o the_o circulation_n of_o the_o blood_n be_v not_o only_o quicken_v by_o the_o contraction_n of_o the_o heart_n but_o also_o by_o the_o frequent_o repeat_v contraction_n of_o the_o muscle_n for_o the_o heart_n contract_v send_v it_o out_o into_o the_o musculous_a part_n and_o again_o those_o muscle_n drive_v it_o soon_o and_o more_o forcible_o back_o upon_o the_o heart_n from_o whence_o it_o appear_v that_o both_o the_o heat_n of_o the_o blood_n be_v increase_v by_o be_v often_o ferment_v in_o those_o glandule_n and_o consequent_o that_o it_o depend_v on_o the_o mixture_n and_o fermentation_n of_o the_o animal_n spirit_n and_o arterial_a blood_n from_o hence_o it_o be_v manifest_a how_o far_o circulation_n be_v beneficial_a another_o in_o carry_v on_o the_o heat_n of_o the_o blood_n and_o if_o we_o consider_v the_o reason_n which_o i_o have_v give_v of_o muscular_a motion_n we_o shall_v see_v that_o as_o fermentation_n depend_v on_o muscular_a motion_n so_o muscular_a motion_n depend_v on_o fermentation_n so_o that_o as_o i_o say_v before_o there_o be_v a_o continual_a chain_n and_o circulation_n of_o cause_n as_o well_o as_o humour_n in_o a_o man_n body_n to_o proceed_v therefore_o to_o the_o second_o objection_n i_o suppose_v some_o admit_v may_v raise_v viz._n whether_o this_o fermentation_n can_v be_v carry_v on_o in_o so_o short_a a_o time_n as_o a_o continual_a and_o quick_a circulation_n will_v admit_v this_o do_v not_o only_o appear_v possible_a from_o evident_a matter_n of_o fact_n but_o also_o if_o we_o consider_v that_o in_o much_o less_o time_n than_o what_o be_v allow_v for_o fermentation_n in_o the_o glandule_n if_o a_o spark_n of_o fire_n be_v put_v to_o gunpowder_n it_o immediate_o put_v its_o part_n into_o a_o explosion_n and_o that_o the_o blood_n not_o only_a ferment_n in_o so_o short_a a_o time_n but_o that_o it_o may_v prepare_v that_o subtle_a matter_n which_o circulate_v through_o the_o muscular_a fibres_fw-fr we_o may_v with_o a_o great_a deal_n of_o reason_n believe_v if_o we_o do_v but_o take_v notice_n that_o warm_a milk_n if_o it_o be_v but_o forcible_o milk_v into_o vinegar_n it_o present_o be_v separate_v into_o two_o part_n viz._n curd_n and_o whey_n if_o then_o by_o mix_v these_o two_o liquor_n they_o cause_v so_o great_a a_o change_n on_o one_o another_o i_o can_v conceive_v any_o reason_n why_o part_n of_o the_o animal_n spirit_n ferment_v with_o the_o blood_n may_v not_o as_o soon_o be_v mix_v with_o some_o part_n of_o the_o rarefy_v succus_fw-la nutritius_n and_o force_v forward_o into_o the_o fibre_n but_o from_o what_o i_o have_v say_v it_o appear_v that_o beside_o the_o heat_n of_o the_o blood_n be_v cause_v in_o the_o glandule_n by_o fermentation_n and_o how_o it_o be_v continue_v in_o the_o musculous_a part_n i_o shall_v in_o the_o next_o place_n consider_v in_o what_o part_v it_o be_v most_o vigorous_o ferment_v which_o will_v appear_v only_o by_o consider_v where_o the_o spirit_n be_v most_o plentiful_o lay_v down_o for_o if_o fermentation_n depend_v on_o and_o be_v chief_o cause_v by_o the_o animal_n spirit_n as_o i_o have_v show_v then_o it_o must_v needs_o follow_v that_o the_o heat_n of_o the_o blood_n be_v most_o promote_v in_o those_o part_n where_o animal_n spirit_n be_v most_o predominant_a and_o have_v prove_v that_o in_o order_n to_o prepare_v that_o subtle_a liquor_n which_o cause_v contraction_n of_o the_o muscle_n a_o great_a quantity_n of_o animal_n spirit_n be_v send_v there_o it_o will_v follow_v that_o the_o blood_n grow_v hot_a be_v most_o vigorous_o ferment_v in_o those_o part_n that_o be_v in_o motion_n and_o