as_o well_o amicable_o as_o noxious_o first_o as_o to_o the_o blood_n which_o be_v most_o considerable_a as_o to_o quantity_n and_o supply_v the_o matter_n to_o the_o nervous_a and_o the_o rest_n of_o the_o juice_n we_o may_v take_v notice_n that_o though_o the_o air_n may_v even_o by_o contact_n affect_v it_o in_o the_o surface_n of_o our_o body_n as_o considerable_o press_v on_o we_o and_o so_o perhaps_o arrest_v or_o various_o determine_v its_o motion_n in_o some_o degree_n yet_o it_o must_v principal_o do_v this_o by_o be_v admit_v into_o it_o this_o admission_n seem_v obvious_a since_o 1_o sy_n live_v in_o it_o we_o can_v take_v any_o either_o meat_n or_o drink_n but_o some_o air_n will_v be_v admix_v and_o so_o be_v convey_v into_o our_o blood_n with_o they_o beside_o 2_o dly_a it_o seem_v not_o improbable_a though_o it_o have_v undergo_v some_o contest_v that_o some_o of_o the_o fine_a part_n of_o it_o may_v be_v admit_v in_o inspiration_n far_o than_o bare_o the_o cavity_n of_o the_o bronchia_fw-la since_o it_o must_v be_v own_v there_o be_v vessel_n from_o the_o little_a glandule_n disperse_v throughout_o they_o which_o transmit_v from_o the_o blood_n there_o and_o whether_o those_o vessel_n may_v not_o receive_v something_o though_o not_o so_o much_o into_o they_o upon_o inspiration_n as_o well_o as_o cast_v forth_o by_o expiration_n may_v deserve_v to_o be_v consider_v since_o the_o air_n come_v into_o the_o lung_n with_o some_o violence_n and_o they_o be_v place_v in_o so_o warm_a a_o situation_n may_v beside_o the_o distension_n upon_o inspiration_n be_v presume_v to_o be_v as_o well_o lax_n enough_o to_o admit_v a_o subtle_a substance_n as_o eject_v a_o gross_a one_o and_o it_o seem_v not_o altogether_o improbable_a that_o nature_n may_v design_v this_o reciprocation_n of_o motion_n for_o that_o end_n partly_o but_o withal_o 3_o dly_a the_o pore_n every_o where_o in_o the_o skin_n seem_v well_o enough_o adjust_v to_o admit_v somewhat_o from_o the_o air_n as_o well_o as_o convey_v forth_o those_o very_a gross_a impurity_n which_o many_o time_n if_o not_o very_o usual_o pass_v forth_o without_o any_o trouble_n and_o if_o it_o be_v object_v that_o the_o transpiration_n continual_o proceed_v from_o within_o must_v hinder_v any_o admission_n from_o without_o by_o the_o same_o vessel_n which_o notion_n heretofore_o seem_v to_o i_o to_o have_v great_a weight_n as_o well_o in_o relation_n to_o these_o as_o most_o other_o vessel_n and_o liquor_n in_o the_o body_n though_o upon_o far_a thought_n it_o require_v some_o limitation_n which_o belong_v not_o to_o this_o place_n to_o be_v lay_v down_o it_o may_v be_v reply_v that_o this_o transpiration_n though_o it_o shall_v be_v suppose_v continual_a be_v not_o in_o the_o same_o tenor_n still_o so_o that_o when_o it_o proceed_v minutely_o there_o may_v be_v a_o admission_n perhaps_o from_o without_o between_o the_o particle_n of_o this_o gross_a and_o slow_o move_v matter_n in_o vessel_n 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nitrous_a the_o ramous_a and_o other_o grosser_n be_v keep_v in_o a_o continual_a agitation_n do_v both_o undergo_v due_a comminution_n and_o also_o be_v hinder_v from_o too_o close_o adhere_v and_o thence_o as_o well_o from_o stagnate_v in_o the_o wide_a vessel_n as_o obstruct_v the_o capillary_n and_o interstice_n between_o the_o artery_n and_o vein_n but_o such_o a_o agitation_n be_v necessary_a to_o it_o for_o the_o keep_n up_o its_o vital_a crasis_n it_o may_v easy_o be_v infer_v that_o if_o such_o air_n be_v admit_v as_o shall_v overmuch_o check_v this_o agitation_n the_o crasis_n of_o it_o must_v come_v to_o be_v much_o alter_v and_o those_o part_n which_o be_v before_o dissociate_v by_o the_o briskness_n of_o their_o motion_n must_v be_v considerable_o ramous_a lay_v hold_v on_o one_o another_o and_o so_o either_o become_v grumou_n or_o create_v a_o viscosity_n in_o it_o which_o once_o begin_v be_v not_o soon_o nor_o easy_o correct_v these_o particle_n clasp_v one_o another_o too_o firm_o to_o be_v quick_o unlock_v by_o the_o permeate_a spirit_n who_o activity_n likewise_o these_o viscous_a substance_n be_v apt_a to_o elude_v by_o their_o lubricity_n thence_o oblige_v they_o to_o slip_v by_o they_o or_o else_o inviscate_v they_o second_o as_o to_o the_o nervous_a juice_n it_o be_v make_v out_o of_o the_o blood_n must_v therefore_o in_o some_o degree_n undergo_v impression_n analogous_a to_o what_o be_v make_v upon_o this_o from_o substance_n admix_v with_o it_o whether_o we_o consider_v it_o in_o its_o due_a or_o deprave_a state_n since_o it_o may_v be_v easy_o imagine_v that_o some_o of_o the_o admit_v substance_n of_o the_o air_n before_o mention_v may_v be_v deposit_v into_o the_o nerve_n at_o their_o original_n together_o with_o the_o true_a matter_n of_o that_o juice_n and_o beside_o if_o the_o blood_n in_o general_n be_v once_o become_v viscous_a from_o whatsoever_o cause_n it_o be_v scarce_a possible_a but_o that_o some_o part_n of_o such_o a_o matter_n must_v in_o the_o act_n of_o secretion_n pass_v into_o the_o nerve_n so_o that_o the_o air_n in_o some_o constitution_n of_o it_o much_o dispose_n to_o viscosity_n its_o influence_n therefore_o must_v be_v interpret_v to_o be_v partly_o on_o this_o juice_n at_o such_o time_n but_o moreover_o i_o see_v no_o reason_n but_o some_o particle_n of_o it_o may_v when_o more_o than_o ordinary_o abound_v with_o such_o substance_n as_o be_v subtle_a and_o active_a even_o through_o the_o pore_n be_v admit_v into_o this_o liquor_n our_o body_n be_v every_o where_o permeable_a to_o subtle_a substance_n since_o i_o conceive_v they_o in_o a_o due_a proportion_n be_v necessary_a even_o to_o the_o due_a spiritualization_n of_o this_o juice_n and_o therefore_o for_o its_o excitation_n towards_o that_o may_v require_v to_o be_v admit_v partly_o a_o near_a way_n than_o that_o roundabout_a one_o of_o the_o chyle_n but_o second_o the_o air_n be_v influence_n must_v be_v acknowledge_v to_o be_v very_o great_a on_o the_o solid_a part_n likewise_o as_o both_o immediate_o touch_v upon_o some_o of_o they_o and_o also_o by_o reason_n of_o their_o firmness_n be_v long_o retain_v by_o they_o when_o once_o admit_v into_o their_o porosity_n which_o by_o the_o mediation_n of_o the_o blood_n beside_o the_o other_o way_n mention_v which_o be_v applicable_a to_o these_o as_o well_o as_o the_o liquor_n it_o be_v easy_a to_o imagine_v its_o particle_n may_v than_o in_o those_o fluid_a substance_n so_o that_o in_o the_o forementioned_a suggestion_n of_o its_o superabounding_a with_o noxious_a substance_n they_o must_v be_v much_o dispose_v to_o be_v affect_v by_o it_o and_o indeed_o there_o seem_v to_o be_v none_o even_o of_o the_o most_o consistent_a part_n of_o our_o body_n but_o be_v pervious_a enough_o to_o and_o consequent_o apt_a to_o be_v act_v on_o by_o such_o penetrate_a substance_n but_o among_o they_o all_o none_o seem_v so_o liable_a to_o receive_v impression_n from_o they_o as_o the_o brain_n on_o the_o account_n of_o its_o tender_a constitution_n for_o though_o nature_n have_v place_v so_o strong_a fence_n about_o it_o that_o perhaps_o it_o will_v hard_o be_v admit_v that_o the_o coldness_n of_o the_o ambient_fw-la can_v great_o prejudice_v through_o they_o yet_o that_o it_o may_v by_o the_o mediation_n of_o the_o blood_n pass_v through_o it_o be_v i_o suppose_v easy_a enough_o to_o be_v allow_v from_o what_o have_v be_v say_v but_o beside_o there_o seem_v two_o or_o three_o other_o way_n by_o which_o in_o such_o a_o constitution_n of_o the_o season_n it_o may_v be_v injure_v viz._n first_o by_o the_o air_n be_v affect_v the_o mammillary_a process_n as_o it_o pass_v brisk_o by_o they_o upon_o inspiration_n which_o be_v considerable_o large_a nerve_n must_v beside_o the_o consideration_n of_o the_o impetuosity_n of_o the_o air_n be_v motion_n in_o that_o circumstance_n be_v act_v on_o by_o
but_o from_o which_o of_o they_o it_o be_v requisite_a we_o inquire_v to_o consider_v first_o the_o passive_a quality_n of_o the_o air_n dryness_n and_o moisture_n it_o may_v perhaps_o seem_v probable_a that_o they_o may_v in_o order_n to_o produce_v this_o as_o well_o as_o some_o other_o distemper_n indispose_v the_o brain_n the_o former_a by_o harden_v the_o tone_n of_o the_o sanguiferous_a vessel_n in_o general_a and_o consequent_o contract_v their_o tube_n and_o so_o cause_v a_o acceleration_n of_o the_o motion_n of_o the_o blood_n through_o they_o which_o must_v if_o propel_v with_o the_o same_o force_n at_o its_o original_n run_v more_o swift_o through_o vessel_n when_o thus_o straighten_a than_o whilst_o have_v their_o usual_a dilatation_n whereby_o it_o may_v be_v presume_v that_o when_o cast_v forth_o of_o the_o artery_n into_o the_o interstice_n between_o they_o and_o the_o vein_n at_o their_o extremity_n it_o may_v make_v its_o way_n into_o the_o more_o yield_a substance_n it_o be_v any_o where_o to_o pass_v through_o and_o the_o brain_n be_v confess_o more_o so_o than_o any_o other_o part_n of_o the_o body_n be_v therefore_o most_o likely_a to_o be_v affect_v on_o such_o occasion_n the_o latter_a which_o be_v countenance_v by_o the_o great_a hypocrates_n sect._n 3_o aph._n 16._o by_o intenerate_v the_o brain_n so_o much_o beyond_o its_o usual_a constitution_n that_o it_o may_v thence_o become_v more_o than_o natural_o susceptible_a of_o the_o always_o brisk_o circulate_v blood_n next_o as_o to_o the_o most_o efficacious_a of_o the_o active_a one_o heat_v it_o may_v perhaps_o be_v urge_v that_o the_o blood_n though_o otherwise_o well_o enough_o constitute_v be_v much_o heat_v and_o rarify_v by_o that_o excess_n of_o the_o ambient_fw-la may_v be_v incline_v to_o make_v its_o way_n out_o of_o the_o vessel_n in_o the_o brain_n especial_o on_o the_o account_n of_o its_o forementioned_a tenderness_n but_o beside_o that_o experience_n warrant_v none_o of_o these_o supposition_n perhaps_o it_o can_v hardly_o be_v make_v out_o 1_o st_z that_o so_o great_a a_o dryness_n as_o must_v effect_v this_o can_v be_v introduce_v into_o our_o body_n which_o be_v continual_o irrigate_v not_o only_o by_o the_o circulate_v blood_n but_o other_o secondary_a liquor_n 2_o dly_a that_o a_o great_a excess_n of_o moisture_n in_o the_o air_n shall_v produce_v apoplexy_n unless_o those_o more_o rare_a one_o as_o i_o suppose_v they_o be_v from_o the_o serum_fw-la and_o that_o general_o after_o other_o distemper_n which_o have_v weaken_v the_o crasis_n of_o the_o blood_n as_o well_o as_o the_o tone_n of_o the_o brain_n since_o such_o a_o dyscrasy_a impress_v on_o the_o blood_n seem_v to_o make_v it_o more_o torpid_a by_o clog_a the_o spirit_n in_o it_o and_o so_o less_o apt_a to_o inundation_n and_o beside_o relax_n the_o vessel_n as_o well_o as_o the_o substance_n of_o the_o brain_n and_o so_o favour_v its_o ready_a passage_n along_o they_o and_o 3_o dly_z that_o the_o excess_n of_o outward_a heat_n shall_v cause_v this_o eruption_n since_o by_o it_o the_o solid_a part_n may_v be_v as_o well_o presume_v to_o be_v invigorate_v to_o resist_v as_o the_o blood_n excite_v to_o attempt_v it_o beside_o that_o the_o transpiration_n that_o be_v occasion_v by_o this_o heat_n may_v sufficient_o compensate_a for_o the_o accelerate_a motion_n of_o the_o blood_n its_o quantity_n which_o may_v in_o that_o case_n be_v principal_o dangerous_a be_v thence_o diminish_v it_o remain_v then_o to_o attribute_v this_o frequency_n of_o apoplexy_n to_o the_o coldness_n of_o the_o air_n as_o the_o most_o adequate_a occasion_n which_o when_o it_o happen_v to_o be_v intense_o so_o may_v i_o conceive_v be_v make_v out_o to_o give_v a_o probable_a reason_n of_o it_o that_o cold_a be_v a_o great_a enemy_n to_o the_o brain_n be_v both_o the_o general_a sense_n and_o confirm_v by_o the_o authority_n of_o hypocrates_n sect._n 5._o aph._n 18._o and_o all_o physician_n since_o and_o therefore_o we_o may_v possible_o infer_v that_o the_o great_a architect_n fence_v this_o part_n with_o so_o strong_a a_o wall_n scarce_o more_o to_o protect_v it_o from_o other_o injury_n than_o this_o to_o which_o it_o will_v otherwise_o be_v expose_v but_o how_o cold_a affect_v it_o so_o injurious_o may_v require_v a_o little_a explication_n in_o order_n to_o it_o give_v i_o leave_v sir_n to_o consider_v without_o pretend_v to_o discuss_v it_o so_o minutely_o as_o man_n of_o more_o philosophical_a head_n and_o better_o accomplish_v in_o such_o speculation_n might_n the_o nature_n of_o cold_a as_o be_v requisite_a to_o be_v know_v in_o some_o measure_n to_o the_o understanding_n its_o relative_a effect_n which_o attempt_n indeed_o may_v appear_v very_o presumptuous_a after_o that_o the_o exquisite_a mr._n boyle_n have_v not_o think_v fit_a to_o determine_v in_o the_o matter_n but_o that_o you_o may_v perhaps_o find_v that_o the_o short_a deduction_n i_o make_v however_o unartificial_o be_v either_o take_v from_o or_o i_o conceive_v reducible_a to_o what_o he_o have_v deliver_v and_o so_o far_o from_o be_v positive_o assert_v that_o they_o be_v only_o submit_v to_o the_o censure_n of_o your_o and_o other_o better_a judgement_n to_o which_o purpose_n three_o or_o four_o general_a consideration_n seem_v not_o unfit_a so_o far_o as_o belong_v to_o our_o present_a disquisition_n to_o be_v take_v notice_n of_o to_o give_v a_o account_n of_o its_o manner_n of_o affect_v we_o in_o the_o first_o place_n than_o it_o may_v be_v consider_v that_o though_o neither_o cold_a nor_o heat_n nor_o any_o of_o the_o rest_n of_o the_o sensible_a quality_n have_v any_o real_a be_v but_o only_o in_o relation_n to_o our_o perception_n insomuch_o that_o be_v there_o no_o sensitive_a being_n there_n can_v be_v no_o such_o thing_n yet_o they_o must_v be_v found_v on_o something_o that_o do_v real_o exist_v as_o all_o accident_n beside_o be_v so_o that_o though_o they_o can_v be_v reckon_v among_o the_o general_a affection_n of_o matter_n as_o motion_n though_o they_o depend_v upon_o it_o or_o its_o contrary_a rest_v bulk_n figure_n etc._n etc._n be_v which_o will_v still_o be_v where_o matter_n be_v though_o there_o be_v no_o sensitive_a being_n yet_o be_v consequent_a upon_o it_o but_o determine_v by_o these_o and_o associate_v to_o somewhat_o that_o have_v perception_n second_o that_o it_o be_v evident_a our_o sensory_n be_v affect_v by_o cold_a that_o be_v have_v some_o impression_n make_v on_o they_o now_o nothing_o can_v affect_v but_o by_o approach_v to_o that_o which_o it_o do_v so_o affect_v and_o to_o approach_v require_v motion_n it_o must_v follow_v that_o motion_n must_v go_v to_o constitute_v the_o nature_n of_o cold._n which_o though_o it_o may_v seem_v not_o so_o evident_a since_o cold_a be_v reckon_v contrary_a to_o heat_n and_o this_o consist_v obvious_o in_o motion_n it_o may_v be_v urge_v that_o shall_v in_o rest_n yet_o it_o may_v be_v return_v that_o though_o it_o be_v necessary_o to_o be_v infer_v there_o be_v motion_n where_o there_o be_v heat_n yet_o not_o always_o that_o there_o be_v heat_n where_o motion_n so_o that_o it_o be_v not_o motion_n simple_o but_o consider_v with_o some_o adjunct_n viz._n motion_n in_o such_o or_o such_o a_o degree_n and_o with_o relation_n to_o sensitive_a being_n that_o constitute_v heat_v and_o consequent_o that_o it_o be_v not_o to_o be_v infer_v that_o cold_a consist_v in_o absolute_a rest_n because_o contrary_a to_o heat_n but_o in_o a_o different_a degree_n of_o motion_n though_o other_o mechanical_a affection_n must_v concur_v to_o determine_v it_o which_o recede_v on_o one_o hand_n from_o a_o middle_a degree_n of_o it_o in_o our_o sensory_a as_o that_o which_o make_v heat_n do_v on_o the_o other_o which_o too_o may_v be_v evince_v from_o hence_o that_o each_o of_o they_o have_v a_o great_a latitude_n of_o degree_n must_v be_v found_v in_o what_o admit_v of_o degree_n which_o motion_n do_v but_o rest_v not_o three_o that_o motion_n here_o be_v not_o to_o be_v consider_v abstract_o but_o together_o with_o the_o subject_n of_o it_o and_o as_o occasion_v by_o and_o produce_v in_o some_o body_n we_o may_v take_v notice_n that_o as_o it_o be_v evident_a the_o body_n without_o we_o which_o excite_v our_o sensation_n be_v move_v so_o our_o organ_n which_o be_v design_v to_o receive_v the_o impression_n of_o these_o extraneous_a object_n and_o transmit_v they_o to_o the_o soul_n can_v hardly_o be_v presume_v to_o do_v it_o any_o more_o indeed_o than_o prove_v a_o fit_a mansion_n for_o she_o without_o have_v their_o particle_n whether_o consistent_a or_o fluid_a for_o both_o be_v necessary_a to_o their_o construction_n in_o motion_n and_o not_o only_o so_o but_o endue_v with_o a_o determinate_a degree_n of_o it_o this_o degree_n ought_v not_o to_o be_v violent_a for_o so_o the_o
and_o especial_o to_o these_o nitrous_a particle_n which_o be_v dissociate_v by_o other_o of_o different_a kind_n one_o from_o another_o and_o have_v ordinary_o there_o no_o violent_a impulse_n must_v on_o the_o account_n of_o their_o make_n move_v leisurely_o when_o carry_v with_o the_o whole_a course_n of_o the_o mass_n of_o air_n and_o the_o rather_o since_o the_o resistance_n which_o their_o concomitant_a substance_n make_v against_o the_o thick_a extremity_n of_o they_o must_v much_o retard_v their_o motion_n withal_o if_o it_o happen_v that_o these_o point_a particle_n enter_v into_o the_o passage_n of_o those_o sensible_a body_n they_o may_v be_v presume_v so_o to_o strike_v against_o some_o of_o the_o fibre_n that_o constitute_v they_o that_o they_o must_v from_o thence_o irritate_fw-la they_o to_o contract_v themselves_o and_o so_o the_o motion_n of_o the_o fluid_a substance_n in_o they_o must_v be_v effectual_o check_v but_o as_o for_o the_o production_n of_o heat_n another_o modification_n of_o they_o must_v be_v assign_v viz._n a_o very_a brisk_a agitation_n from_o some_o external_a occasion_n which_o happen_v the_o apex_n be_v more_o easy_o agitate_a then_o the_o basis_n must_v necessary_o describe_v a_o circle_n about_o it_o which_o by_o reason_n of_o its_o great_a bulk_n can_v be_v so_o easy_o move_v out_o of_o its_o place_n but_o only_a gyrate_n about_o its_o proper_a centre_n according_a to_o the_o direction_n of_o its_o cone_n and_o by_o so_o do_v the_o cone_n must_v needs_o strike_v very_o violent_o against_o such_o body_n it_o meet_v in_o its_o way_n whence_o a_o sense_n of_o heat_n to_o sensible_a body_n must_v necessary_o proceed_v in_o regard_n the_o force_n of_o this_o agitation_n must_v be_v suppose_v to_o be_v great_a than_o that_o of_o the_o move_v particle_n in_o the_o organ_n which_o too_o must_v be_v raise_v to_o a_o much_o more_o considerable_a degree_n when_o great_a number_n of_o these_o particle_n conspire_v to_o the_o like_a motion_n especial_o if_o minute_n accensible_a substance_n of_o other_o kind_n be_v intersperse_v among_o they_o which_o both_o from_o their_o own_o disposition_n to_o be_v so_o agitate_a and_o their_o disterminate_v a_o little_a these_o nitrous_a one_o whereby_o they_o may_v have_v room_n to_o begin_v their_o gyration_n may_v promote_v this_o accension_n as_o in_o the_o too_o fatal_o know_v experiment_n of_o gunpowder_n i_o must_v indeed_o acknowledge_v that_o the_o angle_n at_o the_o basis_n of_o these_o corpuscle_n if_o they_o be_v pyramidal_a according_a to_o mr._n leewenhoeck_n observation_n may_v hinder_v the_o gyration_n descartes_n suppose_v in_o some_o degree_n but_o it_o be_v easy_a enough_o to_o conceive_v that_o as_o well_o here_o as_o for_o the_o make_v his_o globuli_fw-la aetherei_fw-la these_o angle_n by_o the_o very_a brisk_a motion_n the_o corpuscle_n be_v put_v into_o may_v present_o be_v ground_n off_o and_o so_o they_o fit_v for_o this_o gyration_n and_o this_o much_o more_o easy_o than_o in_o that_o instance_n because_o those_o primitive_a particle_n must_v be_v suppose_v to_o have_v be_v exquisite_o solid_a whereas_o these_o two_o have_v be_v coagmentate_v of_o some_o former_o divide_v and_o only_o now_o cohere_v from_o the_o forementioned_a correspondency_n of_o their_o side_n so_o that_o the_o difference_n seem_v to_o consist_v in_o this_o that_o to_o produce_v cold_a it_o be_v requisite_a that_o these_o nitrous_a particle_n shall_v both_o move_v single_o and_o placid_o and_o also_o insinuate_v themselves_o among_o such_o substance_n as_o may_v confine_v they_o be_v once_o enter_v on_o every_o side_n and_o so_o hinder_v the_o above_o mention_v gyration_n whereas_o to_o engender_v heat_n it_o be_v necessary_a that_o they_o shall_v be_v both_o in_o great_a number_n be_v brisk_o agitate_a and_o general_o move_v in_o a_o sufficient_o yield_v medium_n and_o at_o only_a such_o a_o distance_n from_o one_o another_o as_o that_o in_o their_o gyration_n they_o may_v beat_v off_o one_o another_o with_o their_o point_n from_o whence_o the_o motion_n of_o other_o among_o which_o they_o move_v must_v needs_o be_v considerable_o increase_v and_o withal_o they_o either_o previous_o require_v or_o if_o the_o force_n of_o the_o agitation_n be_v the_o great_a make_v in_o almost_o ever_o so_o close_o a_o room_n a_o considerable_a space_n for_o themselves_o to_o move_v in_o but_o perhaps_o a_o objection_n may_v be_v raise_v against_o what_o i_o intimate_v a_o little_a before_o concern_v the_o ordinary_a motion_n of_o the_o nitrous_a particle_n in_o the_o air_n which_o i_o suppose_v to_o be_v carry_v with_o their_o cones_n forward_o for_o it_o may_v be_v urge_v that_o be_v very_o confuse_o move_v and_o among_o fluid_a substance_n sometime_o the_o basis_n and_o sometime_o the_o side_n may_v in_o such_o a_o agitation_n be_v as_o well_o carry_v so_o as_o the_o apex_n and_o then_o the_o consequence_n of_o their_o insinuation_n which_o i_o deduce_v can_v have_v place_n the_o assign_a figure_n be_v that_o which_o fit_v they_o to_o produce_v the_o effect_n to_o which_o i_o return_v first_o that_o though_o some_o may_v in_o their_o motion_n when_o brisk_a so_o appel_n to_o body_n as_o be_v object_v yet_o there_o be_v great_a number_n than_o ordinary_a in_o frosty_a season_n float_v in_o the_o air_n it_o be_v probable_a that_o some_o at_o least_o of_o they_o will_v be_v carry_v as_o i_o suppose_v but_o second_o it_o seem_v to_o i_o probable_a that_o be_v move_v placid_o enough_o according_a to_o the_o supposition_n their_o natural_a tendency_n must_v be_v with_o their_o point_n forward_o for_o in_o that_o posture_n they_o both_o find_v less_o resistance_n among_o those_o against_o which_o they_o move_v and_o be_v support_v in_o their_o motion_n by_o other_o lateral_a one_o crowd_v upon_o they_o and_o also_o those_o which_o be_v move_v behind_o they_o impel_v they_o the_o more_o easy_o forward_a when_o they_o impinge_a against_o a_o flat_a surface_n as_o the_o basis_n be_v suppose_v general_o to_o have_v or_o at_o lest_o what_o approach_v towards_o it_o than_o against_o that_o of_o any_o other_o figure_n and_o therefore_o determine_v they_o to_o carry_v their_o apex_n as_o i_o say_v but_o whatever_o their_o make_n be_v it_o be_v both_o general_o suppose_v and_o seem_v to_o i_o very_o probable_a that_o without_o these_o the_o air_n can_v hardly_o be_v vital_a for_o some_o substance_n that_o be_v fit_a to_o be_v agitate_a but_o unapt_a to_o cohere_v seem_v requisite_a to_o be_v intermix_v among_o the_o various_a part_n of_o our_o blood_n and_o other_o liquor_n which_o may_v by_o their_o vibration_n whether_o occasion_v from_o without_o or_o from_o the_o motion_n of_o our_o spirit_n keep_v they_o from_o too_o close_a complication_n which_o that_o many_o of_o they_o be_v much_o subject_n to_o be_v very_o obvious_a and_o these_o i_o take_v to_o be_v those_o usual_o call_v nitrous_a but_o though_o these_o in_o the_o air_n may_v have_v a_o very_a great_a if_o not_o the_o principal_a influence_n on_o any_o body_n they_o can_v enter_v into_o to_o produce_v many_o effect_n but_o particular_o on_o sensile_a one_o cold_a yet_o both_o the_o elastical_a particle_n and_o also_o the_o steam_n before_o mention_v with_o which_o the_o atmosphere_n be_v considerable_o store_v must_v much_o concur_v to_o any_o of_o they_o these_o on_o the_o account_n of_o their_o great_a variety_n and_o irregularity_n whereby_o they_o be_v apt_a to_o be_v determine_v to_o very_o differ_v motion_n and_o thence_o to_o solicit_v the_o particle_n of_o the_o body_n they_o act_v on_o to_o the_o like_a for_o the_o nitrous_a one_o to_o enter_v and_o those_o by_o their_o expansiveness_n enlarge_a the_o passage_n for_o they_o so_o that_o when_o the_o air_n from_o any_o occasion_n happen_v to_o abound_v more_o than_o ordinary_o with_o niter_n the_o assign_a effect_n of_o it_o may_v be_v presume_v easy_o to_o be_v produce_v and_o especial_o on_o our_o body_n which_o be_v of_o a_o contexture_n tender_a and_o yield_a enough_o must_v be_v injurious_o affect_v if_o either_o the_o motion_n or_o other_o disposition_n of_o its_o particle_n prove_v to_o be_v disproportionate_a to_o the_o part_n of_o they_o or_o substance_n contain_v in_o they_o therefore_o to_o inquire_v second_o how_o our_o body_n but_o particular_o the_o brain_n come_v to_o be_v thus_o injurious_o affect_v from_o hence_o we_o may_v take_v notice_n that_o the_o air_n with_o the_o substance_n it_o carry_v in_o it_o exert_v it_o influence_n partly_o on_o the_o liquor_n and_o partly_o on_o the_o solid_a part_n first_o for_o the_o liquor_n we_o may_v consider_v brief_o how_o it_o come_v to_o be_v admit_v into_o and_o be_v so_o after_o what_o manner_n it_o act_v upon_o first_o the_o blood_n and_o then_o the_o nervous_a juice_n to_o omit_v the_o rest_n of_o they_o as_o little_o conduce_v to_o the_o present_a speculation_n and_o this_o