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 within_o work_v upon_o one_o another_o or_o from_o something_o from_o without_o now_o in_o all_o these_o way_n as_o he_o be_v please_v to_o call_v they_o since_o heat_n be_v produce_v by_o the_o same_o method_n in_o philosophy_n so_o it_o be_v reasonable_a to_o affirm_v that_o there_o be_v but_o one_o way_n by_o which_o all_o thing_n become_v hot_a viz._n by_o attrition_n for_o water_n grow_v hot_a because_o the_o particle_n of_o fire_n be_v mix_v motion_n with_o it_o and_o put_v its_o part_n into_o a_o swift_a motion_n and_o the_o effluvium_n of_o corrosive_n be_v very_o volatile_a and_o in_o a_o strong_a and_o powerful_a motion_n by_o a_o attrition_n and_o grind_v upon_o one_o another_o cause_n heat_n so_o also_o the_o particle_n of_o flame_n by_o attrition_n turn_v sulphur_n into_o flame_n and_o by_o motion_n only_o not_o so_o intense_a a_o less_o violent_a degree_n of_o heat_n be_v produce_v in_o putrefaction_n so_o that_o in_o all_o these_o way_n heat_v only_o proceed_v from_o rarify_v matter_n put_v into_o a_o violent_a motion_n by_o attrition_n and_o the_o consequence_n of_o that_o attrition_n be_v fermentation_n after_o the_o same_o manner_n heat_n be_v produce_v in_o solid_a body_n for_o when_o flint_n and_o steel_n be_v violent_o strike_v together_o the_o sulphureous_a particle_n be_v scatter_v and_o dissolve_v by_o that_o force_n be_v put_v into_o a_o brisk_a and_o swift_a motion_n but_o although_o from_o hence_o it_o appear_v that_o all_o body_n whatsoever_o answer_v grow_v hot_a by_o be_v put_v into_o motion_n by_o a_o intestine_a collision_n and_o attrition_n of_o particle_n and_o consequent_o but_o one_o way_n yet_o some_o will_v be_v apt_a to_o think_v that_o since_o there_o be_v so_o much_o difference_n betwixt_o water_n corrosive_a salt_n and_o sulphureous_a body_n that_o there_o must_v needs_o be_v some_o difference_n in_o their_o way_n of_o work_v upon_o one_o another_o to_o which_o all_o that_o i_o need_v to_o say_v more_o be_v that_o though_o different_a body_n be_v different_o apply_v together_o yet_o it_o be_v evident_a that_o they_o only_o operate_v by_o those_o particle_n that_o be_v in_o motion_n and_o which_o communicate_v motion_n to_o each_o other_o and_o one_o may_v as_o well_o say_v that_o sulphur_n kindle_v by_o a_o flame_n be_v make_v hot_a per_fw-la admotum_fw-la calidi_fw-la as_o that_o water_n be_v for_o as_o flame_n be_v apply_v to_o one_o so_o the_o disperse_a particle_n of_o fire_n be_v communicate_v to_o the_o other_o this_o learned_a author_n have_v lay_v these_o premise_n to_o establish_v consider_v a_o rational_a hypothesis_n upon_o and_o conclude_v that_o the_o blood_n of_o a_o man_n body_n can_v not_o become_v hot_a any_o other_o way_n but_o by_o accension_n go_v on_o to_o compare_v the_o accension_n of_o the_o blood_n with_o the_o burn_a of_o the_o flame_n and_o because_o as_o he_o think_v the_o same_o thing_n be_v requisite_a to_o continue_v both_o viz._n first_o a_o free_a and_o 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
more_o ready_o to_o its_o motion_n upward_o be_v less_o compact_a above_o then_o below_o i_o shall_v produce_v two_o or_o three_o instance_n which_o prove_v that_o if_o it_o have_v but_o less_o liberty_n to_o ascend_v by_o the_o opposition_n of_o some_o other_o body_n then_o to_o descend_v it_o will_v as_o natural_o fly_v downward_o as_o it_o do_v now_o upward_o when_o it_o be_v otherwise_o and_o i_o shall_v also_o prove_v that_o if_o it_o have_v but_o a_o equal_a resistance_n on_o each_o side_n it_o will_v expand_v orbicular_o and_o first_o that_o if_o flame_n have_v but_o a_o equal_a resistance_n from_o ambient_fw-la body_n on_o each_o side_n it_o will_v expand_v orbicular_o will_v be_v prove_v by_o this_o experiment_n viz._n fill_v a_o hollow_a globe_n with_o gunpowder_n one_o side_n of_o which_o be_v a_o little_o thin_a than_o the_o other_o and_o whatever_o way_n that_o thin_a side_n be_v turn_v whether_o down_o upward_o or_o horizon-ward_n the_o gunpowder_n will_v expand_v and_o break_v out_o that_o way_n second_o to_o prove_v that_o if_o there_o be_v but_o more_o liberty_n for_o the_o descent_n than_o ascent_n of_o it_o fleame_z will_v natural_o fly_v downward_o we_o need_v but_o shoot_v a_o gun_n off_o with_o the_o mouth_n downward_o for_o the_o explauded_a gunpowder_n find_v a_o open_a and_o easy_a passage_n downward_o and_o be_v resist_v upward_o and_o on_o each_o side_n it_o natural_o descend_v but_o some_o perhaps_o that_o do_v not_o thorough_o understand_v why_o a_o thing_n be_v say_v natural_o to_o ascend_v or_o descend_v may_v be_v unwilling_a to_o believe_v that_o when_o a_o gun_n be_v shoot_v downward_o the_o motion_n of_o the_o flame_n be_v a_o natural_a motion_n but_o may_v rather_o think_v it_o preternatural_a but_o that_o it_o may_v appear_v that_o it_o be_v as_o true_o a_o naral_a motion_n in_o philosophy_n philosophy_n as_o the_o ascend_a motion_n of_o it_o i_o shall_v consider_v why_o flame_n may_v be_v say_v natural_o to_o ascend_v fleame_z then_o be_v say_v natural_o to_o ascend_v because_o it_o be_v the_o nature_n of_o it_o for_o the_o most_o part_n to_o do_v so_o which_o be_v as_o much_o as_o to_o say_v the_o nature_n of_o flame_n incline_v it_o to_o ascend_v how_o the_o nature_n of_o it_o incline_v it_o to_o ascend_v i_o have_v already_o show_v and_o that_o there_o be_v the_o same_o reason_n why_o the_o descend_a motion_n shall_v be_v term_v natural_a will_v easy_o be_v prove_v for_o as_o it_o be_v natural_a for_o it_o to_o ascend_v as_o long_o as_o it_o have_v only_o the_o air_n to_o oppose_v its_o motion_n so_o it_o be_v its_o nature_n to_o descend_v when_o the_o order_n of_o opposition_n be_v change_v and_o the_o latter_a be_v as_o much_o a_o natural_a motion_n as_o the_o former_a all_o that_o diversify_v the_o tendency_n of_o flame_n be_v those_o accidental_a circumstance_n which_o be_v about_o it_o and_o as_o a_o ball_n cast_v against_o the_o bottom_n of_o a_o room_n rebound_v upward_o and_o when_o it_o be_v throw_v against_o the_o top_n of_o it_o as_o natural_o fly_v down_o so_o flame_n be_v in_o a_o brisk_a motion_n natural_o fly_v up_o or_o down_o as_o the_o part_n of_o matter_n it_o strike_v against_o resist_v it_o and_o cause_v it_o to_o fly_v back_o from_o they_o have_v make_v this_o short_a digression_n i_o shall_v proceed_v next_o to_o examine_v examine_v diemerbroek_n opinion_n who_o think_v that_o the_o vital_a spirit_n by_o reason_n of_o its_o volatility_n always_o endeavour_v to_o fly_v away_o do_v continual_o agitate_v those_o grosser_n particle_n of_o the_o blood_n with_o which_o it_o be_v entangle_v and_o detain_v from_o flight_n and_o be_v diverse_o vibrate_v and_o beat_v back_o and_o so_o the_o whole_a mass_n be_v keep_v in_o a_o continual_a fermentative_a motion_n there_o be_v a_o heat_n produce_v in_o it_o which_o in_o a_o great_a agitation_n be_v great_a etc._n etc._n and_o so_o differ_v according_a to_o the_o different_a degree_n of_o agitation_n all_o that_o i_o shall_v or_o need_v to_o take_v notice_n of_o here_o be_v that_o that_o agitation_n of_o particle_n which_o he_o say_v cause_v the_o heat_n of_o the_o blood_n rather_o produce_v a_o sensation_n of_o heat_n by_o affect_v our_o sense_n in_o their_o motion_n than_o produce_v that_o which_o we_o call_v heat_n in_o the_o blood_n but_o to_o know_v the_o true_a reason_n of_o the_o heat_n of_o the_o blood_n we_o must_v understand_v how_o those_o particle_n be_v put_v into_o motion_n which_o by_o affect_v our_o sensory_a cause_n such_o a_o sensation_n so_o that_o he_o seem_v to_o i_o to_o say_v no_o more_o then_o that_o that_o which_o have_v a_o power_n to_o cause_n heat_n be_v the_o cause_n of_o that_o power_n when_o he_o ought_v in_o order_n to_o explain_v the_o heat_n of_o the_o blood_n to_o have_v show_v from_o whence_o that_o power_n proceed_v the_o reason_n of_o which_o i_o shall_v have_v take_v in_o some_o measure_n for_o the_o reason_n of_o the_o heat_n potential_o in_o the_o mass_n of_o blood_n but_o from_o what_o he_o have_v say_v it_o appear_v that_o he_o have_v not_o explain_v the_o true_a reason_n of_o the_o heat_n of_o the_o blood_n so_o plain_o that_o i_o need_v say_v no_o more_o against_o it_o dr._n henshaw_n think_v that_o the_o dissimilitude_n betwixt_o the_o chyle_n consider_v and_o blood_n be_v so_o great_a that_o it_o become_v immediate_o the_o cause_n of_o a_o extraordinary_a ebullition_n upon_o their_o mixture_n together_o which_o be_v very_o much_o increase_v by_o the_o reciprocal_a motion_n of_o the_o lung_n whereby_o the_o blood_n be_v wrought_v into_o a_o froth_n by_o that_o time_n it_o get_v into_o the_o left_a ventricle_n of_o the_o heart_n which_o sudden_a excess_n of_o heat_n he_o think_v not_o unlike_o what_o happen_v upon_o the_o mix_n of_o several_a chemical_a liquor_n together_o for_o the_o heat_n often_o become_v so_o great_a that_o they_o often_o endanger_v the_o vessel_n that_o contain_v they_o but_o he_o may_v as_o well_o have_v say_v that_o there_o be_v so_o great_a a_o dissimilitude_n betwixt_o hot_a blood_n and_o cold_a milk_n that_o as_o soon_o as_o the_o milk_n be_v mix_v with_o it_o it_o will_v cause_v a_o extraordiary_a ebullition_n and_o that_o by_o expose_v they_o to_o the_o air_n &_o run_v they_o through_o pipe_n the_o heat_n will_v increase_v but_o this_o be_v so_o plain_o false_a that_o it_o need_v no_o other_o argument_n but_o reflection_n to_o convince_v the_o weak_a reason_n and_o he_o may_v equal_o as_o well_o conclude_v that_o water_n will_v kindle_v a_o fire_n and_o increase_v the_o flame_n of_o it_o because_o oil_n will_v as_o that_o chyle_n will_v put_v the_o blood_n into_o a_o heat_n because_o oil_n of_o turpentine_n and_o spirit_n of_o wine_n will_v grow_v hot_a when_o mix_v together_o but_o the_o conclusion_n be_v manifest_o absurd_a i_o shall_v in_o the_o next_o place_n endeavour_v to_o show_v the_o reason_n of_o the_o heat_n of_o the_o blood_n as_o evident_o as_o possible_o i_o can_v from_o what_o i_o have_v already_o say_v in_o answer_n to_o dr._n willis_n opinion_n it_o sufficient_o appear_v that_o whether_o we_o say_v the_o blood_n grow_v hot_a per_fw-la admotum_fw-la calidi_fw-la accension_n or_o any_o other_o way_n it_o be_v no_o more_o than_o to_o express_v the_o same_o thing_n several_a way_n or_o to_o make_v word_n different_a in_o sound_n to_o express_v one_o and_o the_o same_o thing_n but_o as_o all_o that_o have_v write_v on_o this_o subject_a have_v make_v choice_n of_o a_o opinion_n different_a name_n to_o signify_v the_o heat_n of_o the_o blood_n by_o whilst_o some_o will_v have_v it_o do_v by_o accension_n other_o by_o attrition_n etc._n etc._n so_o they_o have_v by_o that_o mean_n rather_o dispute_v about_o name_n and_o word_n than_o any_o real_a and_o fundamental_a difference_n in_o their_o opinion_n i_o shall_v not_o here_o enter_v into_o a_o dispute_n whether_o the_o blood_n when_o it_o become_v hot_a may_v most_o proper_o be_v say_v to_o grow_v hot_a or_o its_o heat_n express_v by_o any_o one_o of_o those_o title_n they_o have_v be_v please_v to_o signify_v it_o by_o for_o as_o in_o discourse_v about_o the_o constituent_a part_n of_o a_o man_n it_o be_v not_o necessary_a to_o fix_v any_o name_n upon_o that_o man_n but_o whether_o it_o be_v thomas_n robert_n or_o william_n the_o constituent_a part_n of_o he_o if_o he_o be_v a_o perfect_a man_n will_v still_o be_v the_o same_o so_o in_o discourse_v concern_v the_o heat_n of_o the_o blood_n and_o consider_v the_o principal_a cause_n or_o agent_n and_o the_o more_o remote_a and_o accessary_a cause_n it_o be_v no_o matter_n at_o all_o whether_o the_o consequence_n of_o these_o cause_n be_v signify_v by_o the_o word_n accension_n attrition_n or_o fermentation_n because_o the_o difference_n of_o the_o
he_o say_v that_o there_o be_v other_o way_n of_o calefaction_n as_o fermentation_n putrefaction_n and_o attrition_n but_o the_o sear_n only_o observable_a in_o solid_a body_n the_o design_n accension_n of_o which_o be_v to_o prove_v that_o since_o the_o blood_n have_v not_o any_o other_o body_n apply_v to_o communicate_v heat_n to_o it_o and_o since_o it_o be_v not_o impregnate_v with_o saline_n corrosive_n but_o be_v sufficient_o stock_v with_o sulphureous_a particle_n and_o since_o fermentation_n putrefaction_n and_o attrition_n be_v only_o the_o cause_n of_o heat_n in_o solid_a body_n it_o must_v needs_o be_v preserve_v in_o a_o continual_a heat_n by_o accension_n of_o its_o sulphureous_a pabulum_fw-la but_o if_o we_o do_v hot_a but_o due_o consider_v how_o heat_n be_v promote_v in_o all_o these_o several_a sort_n of_o substance_n it_o will_v present_o appear_v that_o in_o philosophy_n there_o be_v but_o one_o way_n by_o which_o all_o whether_o liquid_a or_o solid_a grow_v hot_a and_o if_o so_o than_o it_o will_v follow_v that_o whether_o we_o say_v the_o blood_n grow_v hot_a by_o apply_v of_o a_o hot_a thing_n to_o it_o or_o saline_n corrosive_n whether_o by_o fermentation_n accension_n or_o attrition_n it_o will_v be_v equivalent_o the_o same_o to_o make_v it_o evident_a heat_n then_o that_o there_o be_v but_o one_o way_n by_o which_o all_o body_n grow_v hot_a and_o that_o to_o say_v that_o the_o heat_n of_o it_o proceed_v from_o the_o application_n of_o other_o hot_a body_n saline_n corrosive_n accension_n fermentation_n or_o attrition_n be_v but_o to_o express_v the_o same_o thing_n several_a way_n since_o they_o be_v all_o equivalent_o perform_v the_o same_o way_n we_o be_v to_o consider_v what_o be_v the_o nature_n of_o hot_a body_n and_o wherein_o their_o power_n consist_v either_o to_o cause_n heat_v themselves_o or_o to_o communicate_v that_o power_n to_o other_o and_o because_o several_a remiss_a degree_n of_o heat_n differ_v only_o in_o proportion_n from_o fire_n which_o be_v the_o most_o intense_a and_o because_o that_o be_v free_a from_o those_o mask_n and_o cloud_n which_o intervene_v it_o and_o our_o sense_n when_o it_o be_v in_o more_o remiss_a degree_n the_o best_a way_n to_o understand_v the_o reason_n of_o heat_n will_v be_v to_o consider_v wherein_o the_o essential_a nature_n of_o fire_n consist_v among_o philosopher_n sight_n although_o it_o be_v very_o dubious_a what_o it_o be_v that_o cause_v fire_n to_o differ_v so_o much_o from_o all_o other_o substance_n yet_o it_o be_v by_o the_o consent_n of_o most_o modern_n and_o evident_a from_o flame_n itself_o and_o the_o manner_n that_o it_o destroy_v other_o body_n by_o that_o it_o be_v make_v up_o of_o rarify_v matter_n who_o particle_n be_v in_o a_o swift_a and_o powerful_a intestine_a agitation_n and_o of_o a_o peculiar_a figure_n and_o size_n and_o if_o fire_n be_v nothing_o else_o but_o matter_n rarefy_v and_o in_o a_o swift_a motion_n and_o from_o that_o swift_a and_o intense_a motion_n of_o matter_n affect_v our_o organ_n of_o sense_n we_o perceive_v heat_n we_o must_v needs_o conclude_v that_o whatever_o rarefy_v matter_n and_o put_v its_o part_n into_o a_o brisk_a motion_n be_v the_o cause_n of_o heat_n and_o although_o according_a to_o the_o diversity_n of_o subject_n that_o heat_n be_v disperse_v through_o it_o have_v different_a appearance_n to_o our_o sense_n and_o in_o most_o it_o be_v light_a which_o when_o it_o exist_v separate_o be_v always_o join_v with_o it_o it_o be_v obscure_v by_o the_o interposition_n and_o mixture_n of_o other_o matter_n yet_o if_o heat_n depend_v essential_o upon_o the_o effect_n that_o rarefy_v matter_n in_o motion_n have_v upon_o our_o sense_n it_o be_v undeniable_o true_a that_o heat_n be_v cause_v only_o one_o way_n remote_o and_o proximate_o with_o respect_n to_o matter_n in_o motion_n and_o the_o effect_v it_o then_o have_v upon_o we_o viz._n by_o put_v the_o part_n of_o matter_n into_o a_o brisk_a motion_n to_o affect_v our_o sense_n with_o violence_n enough_o to_o cause_v such_o a_o sensation_n but_o before_o i_o proceed_v to_o a_o further_a proof_n of_o what_o i_o have_v assert_v viz._n that_o there_o be_v but_o one_o way_n in_o philosophy_n by_o which_o all_o thing_n grow_v hot_a it_o be_v a_o controversy_n whether_o heat_v be_v actual_o in_o the_o body_n that_o cause_v it_o or_o whether_o matter_n in_o motion_n only_o produce_v such_o a_o effect_n as_o the_o sense_n of_o heat_n upon_o our_o sensory_a although_o it_o be_v not_o requisite_a i_o shall_v here_o publish_v my_o opinion_n of_o it_o yet_o it_o be_v necessary_a i_o shall_v explain_v what_o i_o mean_v when_o i_o say_v that_o heat_n be_v only_o produce_v one_o way_n or_o that_o heat_n be_v cause_v by_o put_v the_o part_n of_o matter_n into_o a_o swift_a motion_n or_o that_o heat_n depend_v on_o the_o effect_n which_o rarefy_v matter_n have_v upon_o our_o sense_n when_o it_o be_v in_o motion_n but_o if_o i_o be_v here_o to_o declare_v my_o opinion_n of_o sensation_n this_o point_n which_o be_v so_o different_o hold_v by_o various_a philosopher_n i_o shall_v say_v that_o as_o far_o as_o i_o can_v conceive_v of_o it_o heat_n be_v not_o actual_o in_o the_o body_n that_o cause_v it_o to_o be_v perceive_v by_o our_o sense_n but_o potential_o in_o as_o much_o as_o that_o body_n have_v a_o power_n to_o cause_v such_o a_o sensation_n and_o although_o a_o great_a many_o may_v wonder_v that_o fire_n which_o cause_n heat_v shall_v not_o be_v hot_a itself_o yet_o there_o be_v as_o much_o reason_n to_o believe_v that_o it_o be_v not_o as_o that_o a_o sword_n which_o will_v cause_v pain_n be_v not_o pain_n itself_o for_o those_o who_o think_v that_o fire_n which_o cause_n heat_v be_v heatt_z itself_o take_v the_o cause_n for_o the_o effect_n and_o affirm_v it_o to_o be_v so_o beside_o heat_v be_v only_o a_o sensation_n and_o it_o it_o be_v impossible_a there_o shall_v be_v a_o sensation_n where_o there_o be_v no_o sense_n it_o be_v impossible_a there_o shall_v be_v heat_n where_o there_o be_v only_a fire_n and_o no_o sense_n for_o it_o to_o work_v upon_o for_o heat_n be_v not_o a_o mode_n of_o matter_n rarefy_v and_o in_o motion_n but_o a_o effect_n of_o matter_n so_o modify_v but_o say_v they_o it_o be_v impossible_a for_o we_o to_o think_v so_o true_o if_o we_o be_v not_o direct_v in_o our_o thought_n by_o reason_n we_o may_v irrational_o think_v that_o matter_n in_o motion_n which_o only_o cause_v heat_n be_v heat_n but_o if_o our_o reason_n proceed_v upon_o those_o medium_n which_o our_o sense_n furnish_v we_o with_o and_o certain_o we_o can_v on_o no_o other_o we_o shall_v easy_o be_v induce_v to_o believe_v that_o the_o cause_n be_v not_o the_o effect_n there_o be_v a_o great_a deal_n of_o reason_n for_o we_o to_o believe_v so_o though_o none_o to_o the_o contrary_n when_o then_o i_o say_v that_o heat_n be_v only_o produce_v one_o way_n i_o mean_v that_o there_o be_v but_o one_o way_n to_o modify_v body_n so_o as_o to_o make_v they_o capable_a of_o cause_v heat_n when_o they_o affect_v our_o sensory_a and_o when_o i_o say_v that_o heat_n be_v cause_v by_o put_v the_o part_n of_o matter_n into_o motion_n i_o mean_v that_o a_o power_n of_o produce_v heat_n be_v cause_v so_o and_o when_o i_o say_v that_o heat_n depend_v on_o the_o effect_n that_o rarefy_v matter_n have_v upon_o our_o sense_n i_o mean_v it_o be_v cause_v by_o those_o affect_v our_o sense_n and_o because_o always_o when_o i_o have_v occasion_n to_o mention_v the_o cause_n of_o heat_n it_o will_v be_v too_o much_o circumlocution_n to_o say_v the_o power_n of_o cause_v heat_n be_v produce_v so_o or_o otherwise_o i_o shall_v use_v the_o word_n heat_v sometime_o to_o signify_v that_o motion_n of_o rarify_v matter_n which_o be_v sufficient_a to_o cause_v heat_n and_o shall_v call_v that_o motion_n heat_v in_o respect_n of_o the_o effect_n which_o it_o cause_v but_o to_o proceed_v to_o a_o further_o and_o more_o evident_a proof_n that_o heat_n prove_v or_o a_o power_n to_o produce_v it_o be_v only_o cause_v one_o way_n we_o be_v to_o consider_v how_o the_o motion_n of_o particle_n be_v carry_v on_o in_o all_o those_o which_o dr._n willis_n call_v different_a way_n of_o cause_v heat_n viz._n per_fw-la admotum_fw-la calidi_fw-la saline_n corrosive_n accension_n and_o even_o fermentation_n and_o putrefaction_n and_o first_o when_o water_n be_v put_v over_o the_o fire_n and_o heat_a per_fw-la admotum_fw-la calidi_fw-la the_o fine_a particle_n of_o fire_n penetrate_v the_o vessel_n be_v imbibe_v into_o the_o water_n and_o be_v fetter_v up_o and_o keep_v from_o fly_v away_o by_o the_o part_n of_o the_o liquor_n put_v they_o also_o into_o a_o quick_a motion_n from_o whence_o proceed_v a_o sensible_a heat_n in_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
except_o by_o hinder_v the_o fierce_a volatile_a part_n which_o ought_v to_o be_v dissipate_v from_o fly_v away_o through_o the_o pore_n of_o the_o skin_n which_o be_v increase_v thereby_o to_o too_o great_a a_o quantity_n exagitate_v the_o mass_n of_o blood_n too_o much_o from_o hence_o it_o brief_o yet_o plain_o appear_v that_o the_o nitre_n of_o the_o air_n alter_v the_o colour_n of_o the_o blood_n and_o also_o serve_v to_o temper_v the_o heat_n of_o it_o i_o shall_v now_o consider_v what_o effect_n it_o have_v upon_o the_o serous_a blood_n lympha_fw-la and_o if_o we_o may_v but_o compare_v it_o to_o milk_n which_o differ_v only_o from_o chyle_n by_o be_v less_o impregnate_v with_o oil_n it_o will_v be_v manifest_a that_o it_o precipitate_v the_o watery_a part_n of_o the_o serum_n which_o join_v with_o the_o fix_a salt_n of_o the_o blood_n dispose_v they_o to_o be_v separate_v and_o carry_v off_o by_o the_o urinary_a passage_n this_o be_v so_o strong_o prove_v both_o by_o non-naturals_a and_o medicine_n that_o to_o deny_v it_o will_v be_v to_o contradict_v reason_n and_o plead_v ignorance_n of_o those_o thing_n it_o be_v almost_o impossible_a for_o we_o not_o to_o take_v notice_n of_o for_o if_o we_o sit_v by_o a_o fire_n in_o a_o close_a warm_a room_n and_o drink_v a_o good_a quantity_n of_o beer_n which_o be_v not_o very_o strong_a it_o present_o if_o we_o go_v into_o the_o cold_a air_n run_v off_o by_o urinal_n beside_o nothing_o in_o medicine_n be_v a_o more_o know_v and_o common_a diuretic_n than_o sal._n prunel_n which_o be_v purify_v nitre_n concenter_v and_o condense_v and_o it_o be_v no_o less_o observable_a in_o a_o experimental_a observation_n of_o the_o famous_a dr._n lower_n who_o in_o his_o book_n de_fw-fr cord_n take_v notice_n that_o as_o much_o serum_n be_v precipitate_v in_o a_o short_a time_n after_o we_o rise_v from_o bed_n as_o in_o the_o whole_a night_n when_o we_o be_v less_o affect_v with_o the_o ambient_fw-la air._n how_o beneficial_a nitre_n be_v in_o precipitate_v the_o serum_n of_o the_o blood_n and_o what_o advantage_n the_o animal_n oeconomy_n receive_v thereby_o i_o shall_v not_o now_o inquire_v yet_o how_o inconsiderable_a a_o part_n of_o its_o office_n soever_o it_o may_v seem_v yet_o if_o it_o be_v due_o weigh_v it_o will_v appear_v very_o useful_a from_o what_o i_o have_v say_v concern_v the_o alteration_n make_v on_o the_o blood_n and_o it_o be_v serum_n i_o shall_v now_o proceed_v to_o consider_v how_o they_o influence_n each_o other_o but_o since_o as_o much_o as_o be_v sufficient_a for_o our_o present_a purpose_n may_v be_v gather_v from_o what_o have_v go_v before_o it_o be_v plain_a that_o the_o cool_a serum_n will_v help_v to_o temper_v the_o heat_n of_o the_o blood_n and_o vice_n versa_fw-la i_o shall_v wave_v a_o further_a notice_n of_o it_o here_o and_o shall_v rather_o show_v that_o the_o lung_n perform_v many_o more_o and_o considerable_a office_n in_o respect_n of_o each_o part_n but_o to_o explain_v they_o will_v not_o only_o be_v to_o treat_v of_o the_o lung_n but_o the_o whole_a body_n and_o the_o use_v of_o all_o the_o part_n which_o be_v not_o my_o present_a design_n i_o shall_v omit_v give_v a_o imperfect_a account_n of_o they_o because_o they_o be_v so_o interweave_v mutual_o with_o one_o another_o that_o they_o can_v true_o be_v understand_v without_o a_o account_n of_o the_o whole_a finis_fw-la our_o knowledge_n in_o philosophy_n be_v limit_v to_o a_o small_a part_n of_o the_o creation_n which_o be_v furnish_v with_o object_n too_o copious_a for_o our_o sense_n of_o which_o at_o the_o best_a we_o have_v but_o a_o imperfect_a knowledge_n the_o pursuit_n of_o knowledge_n very_o desirable_a especial_o of_o that_o which_o be_v most_o advantageous_a there_o be_v more_o reason_n to_o expect_v truth_n and_o certainty_n in_o the_o microcosm_n than_o the_o macrocosm_n where_o it_o be_v easy_o attain_v the_o heat_n of_o the_o blood_n not_o obscure_a in_o respect_n of_o its_o cause_n both_o ancient_n and_o modern_n have_v differ_v as_o to_o the_o cause_n of_o it_o the_o opinion_n of_o the_o ancient_n very_o superficial_a and_o insatisfactory_a dr._n willis_n '_o s_o opinion_n consider_v who_o assert_n that_o there_o be_v three_o way_n by_o which_o liquid_n grow_v hot_a and_o that_o the_o blood_n grow_v hot_a by_o accension_n to_o which_o it_o be_v answer_v that_o there_o be_v but_o one_o way_n in_o philosophy_n by_o which_o all_o thing_n grow_v hot_a several_a degree_n of_o heat_n differ_v only_o in_o degree_n of_o a_o peculiar_a power_n to_o cause_n heat_n and_o fire_n which_o be_v the_o high_a be_v rarify_v matter_n in_o a_o swift_a motion_n which_o mask_v in_o different_a subject_n affect_v not_o our_o sight_n heat_n be_v not_o actual_o in_o the_o body_n that_o cause_v it_o but_o potential_o because_o that_o body_n have_v a_o power_n to_o cause_v such_o a_o sensation_n heat_n be_v only_o a_o sensation_n which_o be_v actual_o where_o there_o be_v sense_n to_o perceive_v it_o that_o heat_n be_v only_o produce_v one_o way_n further_o prove_v viz._n by_o put_v the_o part_n of_o matter_n into_o motion_n a_o seem_a objection_n answer_v his_o comparison_n of_o the_o blood_n accension_n with_o flame_n consider_v there_o be_v several_a degree_n of_o heat_n produce_v without_o visible_a flame_n nitre_n make_v up_o no_o part_n of_o the_o flame_n the_o nitrous_a part_n of_o the_o air_n promote_v flame_n by_o keep_v its_o matter_n from_o disperse_v too_o soon_o wherefore_o fire_n burn_v better_a in_o the_o winter_n than_o in_o the_o summer_n why_o a_o candle_n in_o a_o glass_n globe_n be_v extinguish_v by_o extract_v the_o air._n his_o comparison_n of_o extinguish_a flame_n compare_v with_o the_o death_n of_o a_o animal_n consider_v nitre_n do_v not_o promote_v the_o heat_n of_o the_o blood_n but_o rather_o depress_n for_o in_o liquids_n the_o volatile_a part_n be_v sufficient_o oppose_v by_o the_o part_n of_o the_o blood_n and_o keep_v from_o fly_v away_o blood_n may_v grow_v hot_a without_o a_o sulphureous_a pabulum_fw-la his_o comparison_n of_o the_o recrement_n of_o flame_n and_o of_o blood_n consider_v which_o appear_v wide_o inconsistent_a first_o because_o that_o juice_n that_o sweat_v through_o the_o coat_n of_o the_o trachea_n and_o the_o skin_n be_v not_o recrementitious_a and_o the_o fuliginous_a effluvium_n of_o fire_n be_v recrement_n second_o because_o the_o former_a if_o not_o carry_v of_o increase_v it_o but_o smoak_n extinguish_v fire_n smoak_n be_v not_o altogether_o a_o effluvium_fw-la of_o flame_n smoak_n thus_o compound_v a_o digression_n in_o which_o be_v give_v the_o reason_n why_o flame_n ascend_v rather_o than_o descend_v which_o be_v because_o it_o have_v less_o opposition_n in_o its_o motion_n that_o way_n because_o the_o air_n the_o near_a to_o the_o centre_n make_v strong_a opposition_n than_o that_o above_o which_o be_v prove_v by_o these_o experiment_n it_o be_v also_o prove_v by_o the_o expansion_n of_o gunpowder_n the_o motion_n of_o flame_n downward_o be_v a_o natural_a motion_n in_o philosophy_n diemerbroek_n opinion_n examine_v dr._n henshaw_n '_o s_o opinion_n consider_v ancient_a and_o modern_a writer_n have_v rather_o dispute_v about_o the_o use_n of_o word_n than_o much_o difference_n observable_a in_o their_o opinion_n the_o reason_n why_o heat_n affect_v our_o sensory_a do_v not_o show_v how_o it_o come_v by_o that_o power_n the_o blood_n grow_v hot_a by_o attrition_n the_o consequence_n of_o which_o be_v fermentation_n attrition_n and_o the_o consequence_n of_o it_o both_o to_o be_v signify_v by_o the_o word_n fermentation_n how_o far_o the_o heat_n of_o the_o blood_n proceed_v from_o pressure_n and_o mixture_n to_o dispute_v about_o word_n be_v not_o material_a in_o a_o enquity_n after_o the_o cause_n of_o thing_n the_o whole_a body_n be_v make_v up_o of_o vessel_n and_o humour_n contain_v in_o they_o by_o what_o mean_v the_o spirit_n and_o blood_n be_v mix_v in_o order_n â—o_o a_o fermentation_n animal_n spirit_n demonstrate_v in_o the_o substance_n of_o the_o brain_n viz._n that_o mucilaginous_a oily_a moisture_n which_o we_o call_v brain_n a_o objection_n answer_v that_o it_o be_v the_o most_o spirituous_a part_n of_o the_o blood_n and_o consequent_o animal_n spirit_n prove_v that_o oily_a substance_n be_v capable_a of_o perform_v all_o those_o action_n which_o we_o can_v suppose_v the_o animal_n spirit_n do_v another_o objection_n answer_v that_o these_o spirit_n be_v in_o a_o constant_a motion_n prove_v the_o nature_n of_o the_o animal_n spirit_n consider_v the_o reason_n of_o the_o heat_n of_o the_o blood_n explain_v how_o its_o heat_n be_v promote_v the_o heat_n of_o the_o blood_n vary_v according_a to_o the_o different_a quantity_n of_o they_o it_o vary_v also_o according_a to_o the_o sharpness_n of_o those_o humour_n that_o put_v the_o animal_n spirit_n
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