cause_n of_o their_o ascend_n as_o some_o even_o know_v man_n have_v suffer_v themselves_o to_o be_v persuade_v but_o because_o such_o body_n former_o heavy_a than_o water_n quantity_n for_o quantity_n and_o consequent_o apt_a to_o sink_v have_v now_o acquire_v a_o large_a dimension_n while_o they_o however_o increase_v not_o their_o weight_n and_o so_o become_v light_a than_o the_o water_n contain_v in_o the_o like_a space_n be_v protrude_v by_o it_o to_o the_o top_n where_o they_o by_o degree_n swell_v yet_o big_a so_o that_o sometime_o i_o have_v see_v a_o dog_n lie_v with_o more_o than_o one_o half_a of_o his_o body_n above_o the_o surface_n of_o the_o water_n and_o it_o be_v no_o more_o than_o happen_v in_o a_o pound_n of_o glass_n metal_n or_o other_o heavy_a material_a which_o in_o a_o solid_a mass_n sink_v to_o the_o bottom_n but_o if_o blow_a or_o wrought_v into_o a_o bottle_n it_o keep_v the_o top_n of_o the_o water_n all_o which_o together_o with_o the_o reason_n be_v well_o 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circumference_n though_o somewhat_o more_o slow_o and_o there_o coagulate_v into_o a_o blue_a mould_n 6._o another_o noble_a property_n of_o fermentation_n be_v that_o it_o exalt_v the_o body_n ferment_v to_o what_o perfection_n it_o be_v capable_a of_o but_o than_o it_o be_v requisite_a that_o the_o body_n ferment_v be_v of_o such_o a_o consistence_n as_o may_v not_o be_v ferment_v too_o fast_o as_o in_o fruit_n upon_o tree_n or_o if_o thin_a that_o it_o be_v close_o stop_v in_o some_o full_a vessel_n as_o all_o kind_n of_o drink_n or_o if_o oâ—_n 〈◊〉_d middle_a consistence_n that_o it_o be_v often_o stir_v which_o be_v observe_v by_o apothecary_n in_o the_o make_n of_o treacle_n and_o other_o such_o composition_n which_o afterward_o will_v keep_v a_o very_a long_a time_n for_o thus_o it_o be_v necessary_a that_o that_o spirit_n as_o we_o will_v call_v it_o for_o the_o present_a which_o ferment_n the_o mass_n be_v for_o a_o while_n detain_v either_o by_o the_o tone_n of_o the_o body_n 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aeâ—ochalinos_n or_o a_o register_n for_o the_o air_n in_o five_o chapter_n 1._o of_o fermentation_n 2._o of_o chylification_n 3._o of_o respiration_n 4._o of_o sanguification_n 5._o that_o often_o change_v the_o air_n be_v a_o friend_n to_o health_n also_o a_o discovery_n of_o a_o new_a method_n of_o do_v it_o without_o remove_v from_o one_o place_n to_o another_o by_o mean_n of_o a_o domicil_n or_o air-chamber_n fit_v to_o that_o purpose_n for_o the_o better_a preservation_n of_o health_n and_o cure_v of_o disease_n after_o a_o new_a method_n by_o nathaniel_n henshaw_n m._n d._n a_o member_n of_o the_o royal_a society_n at_o gresham-colledge_n dublin_n print_v for_o samuel_n dancer_n bookseller_n in_o castle-street_n 1664._o to_o the_o right_n honourable_a thomas_n earl_n of_o ossory_n lord_n deputy_n general_n of_o ireland_n etc._n etc._n right_o honourable_a that_o the_o happy_a industry_n of_o former_a age_n whereby_o we_o enjoy_v the_o benefit_n of_o so_o many_o useful_a 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a_o method_n as_o i_o here_o propose_v will_v undoubted_o expose_v it_o to_o the_o calumny_n of_o such_o who_o rather_o than_o give_v themselves_o the_o trouble_n of_o examine_v the_o truth_n of_o it_o be_v betimes_o persuade_v that_o they_o already_o know_v as_o much_o as_o be_v to_o be_v learn_v will_v soon_o condemn_v it_o both_o of_o folly_n and_o innovation_n so_o it_o seem_v of_o absolute_a necessity_n that_o it_o bear_v with_o it_o the_o splendid_a name_n of_o some_o great_a personage_n the_o better_a to_o bespeak_v the_o judicious_a reader_n charitable_a censure_n who_o name_n then_o can_v i_o more_o hopeful_o have_v prefix_v than_o that_o of_o your_o lordship_n a_o person_n so_o noble_a by_o descent_n so_o eminent_a by_o your_o great_a and_o honourable_a employment_n and_o so_o deserve_o belove_v and_o admire_v of_o all_o for_o that_o excellent_a composure_n of_o greatness_n and_o goodness_n so_o remarkable_a in_o your_o lordship_n which_o attempt_n of_o i_o if_o it_o may_v receive_v a_o favourable_a interpretation_n i_o shall_v be_v oblige_v to_o continue_v your_o honour_n in_o all_o submission_n etc._n etc._n n._n h._n dublin_n july_n 1._o 1664._o the_o preface_n i_o hold_v it_o not_o unsuitable_a to_o our_o design_n in_o this_o treatise_n where_o i_o have_v so_o often_o occasion_n to_o make_v mention_n of_o it_o that_o something_o be_v say_v by_o way_n of_o preface_n concern_v the_o air._n not_o that_o i_o intend_v to_o treat_v of_o its_o first_o or_o second_o quality_n etc._n etc._n which_o i_o leave_v to_o the_o natural_a philosopher_n consideration_n much_o less_o of_o the_o elastic_a power_n of_o it_o in_o pneumatick_a engine_n already_o so_o well_o perform_v by_o other_o especial_o by_o the_o honourable_a robert_n boyl_n in_o his_o most_o accurate_a treatise_n on_o that_o subject_a my_o purpose_n here_o be_v only_o to_o present_v my_o reader_n with_o some_o few_o observables_n concern_v air_n the_o better_a to_o confirm_v and_o illustrate_v what_o follow_v in_o the_o treatise_n itself_o especial_o in_o the_o chapter_n of_o fermentation_n first_o therefore_o that_o the_o air_n be_v of_o some_o very_a general_a use_n may_v well_o appear_v from_o its_o be_v so_o great_a in_o vbiquitarian_n as_o it_o be_v no_o place_n almost_o without_o it_o no_o body_n perhaps_o but_o participate_v more_o or_o less_o of_o it_o insomuch_o that_o even_o in_o metal_n themselves_o the_o sound_n of_o they_o it_o reckon_v a_o affection_n of_o the_o air_n include_v in_o they_o and_o if_o the_o transparency_n of_o body_n be_v to_o be_v impute_v to_o their_o porousness_n or_o rather_o to_o the_o straightness_n or_o rectitude_n of_o their_o pore_n as_o it_o be_v almost_o general_o agree_v on_o by_o modern_a writer_n it_o will_v follow_v that_o there_o be_v a_o great_a proportion_n of_o air_n in_o the_o hard_a gem_n which_o be_v yet_o more_o manifest_a in_o soft_a stone_n and_o become_v the_o cause_n of_o their_o moldr_a and_o crack_v after_o they_o be_v take_v out_o of_o the_o quarry_n and_o expose_v to_o the_o weather_n which_o some_o sort_n of_o stone_n be_v very_a subject_n to_o for_o the_o imprison_a air_n that_o while_o it_o be_v in_o the_o cold_a bowel_n of_o the_o earth_n lay_v very_o much_o condense_v or_o compress_v afterward_o symbolise_v with_o the_o air_n of_o a_o thin_a medium_fw-la powerful_o dilate_v its_o self_n and_o after_o some_o time_n so_o weaken_v the_o continuity_n of_o part_n that_o at_o last_o become_v too_o strong_a for_o it_o the_o stone_n break_v into_o many_o piece_n which_o will_v soon_o happen_v if_o the_o same_o be_v throw_v into_o the_o fire_n the_o include_v air_n in_o such_o case_n with_o much_o more_o violence_n dilate_v its_o self_n than_o in_o the_o former_a experiment_n plant_n seem_v to_o owe_v their_o very_a life_n and_o be_v to_o this_o include_v air_n for_o not_o have_v heart_n or_o other_o principal_n of_o motion_n in_o they_o that_o we_o know_v of_o for_o the_o distribute_v of_o the_o sap_n 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be_v hence_o have_v that_o the_o most_o vegetous_a plant_n and_o such_o as_o we_o call_v ever-greens_a abound_v most_o with_o air_n in_o they_o as_o appear_v when_o they_o be_v throw_v into_o the_o fire_n by_o the_o violent_a eruption_n of_o it_o and_o there_o be_v i_o think_v no_o vegetable_a that_o have_v not_o one_o great_a poor_a or_o pipe_n run_v from_o the_o root_n to_o the_o very_a top_n of_o it_o far_o in_o the_o sea_n wrack_n or_o quercus_fw-la marina_n it_o be_v obvious_a for_o every_o one_o to_o observe_v a_o very_a particular_a and_o curious_a contrivance_n of_o nature_n for_o the_o nourishment_n of_o that_o plant_n by_o the_o help_n of_o air_n after_o this_o sort_n the_o plant_n as_o always_o fasten_v to_o some_o stone_n and_o as_o it_o branch_n out_o with_o jagged_a leaf_n somewhat_o resemble_v those_o of_o the_o oak_n it_o have_v several_a little_a blister_n or_o bladder_n on_o it_o some_o where_o
of_o i_o have_v see_v as_o big_a as_o a_o small_a pullet_n egg._n now_o upon_o the_o come_n in_o of_o the_o tide_n the_o water_n rise_v this_o weed_n by_o mean_n of_o the_o say_a bladder_n float_n and_o if_o the_o stone_n be_v not_o too_o heavy_a boy_n it_o up_o and_o hangs_z in_o the_o water_n like_o a_o net_n that_o have_v cork_n and_o lead_n to_o it_o whereupon_o the_o plant_n be_v considerable_o stretch_v and_o again_o upon_o the_o subside_v of_o the_o water_n receive_v its_o nourishment_n as_o in_o the_o former_a instance_n of_o other_o vegetable_n though_o perhaps_o not_o from_o the_o root_n be_v fasten_v to_o a_o stone_n but_o by_o the_o porose_a surface_n of_o its_o body_n and_o last_o that_o there_o be_v much_o air_n disseminated_a through_o the_o body_n of_o animal_n be_v manifest_a from_o their_o food_n herb_n and_o water_n both_o which_o participate_v of_o it_o in_o good_a quantity_n a_o notable_a argument_n whereof_o in_o water_n may_v be_v that_o it_o do_v upon_o such_o easy_a term_n rise_v up_o in_o a_o vapour_n and_o mingle_v its_o minute_n and_o insensible_a part_n with_o the_o air._n for_o as_o the_o water_n grow_v warm_a either_o by_o the_o heat_n of_o the_o sun_n or_o fire_n the_o small_a part_n of_o air_n dilate_v make_v haste_n to_o the_o top_n of_o the_o water_n where_o they_o frame_v themselves_o with_o some_o of_o the_o water_n into_o little_a bubble_n and_o be_v carry_v away_o by_o the_o motion_n of_o the_o air_n or_o medium_fw-la like_o those_o bubble_n make_v by_o child_n with_o soap_n and_o water_n and_o this_o perhaps_o may_v be_v one_o reason_n why_o rain_n water_n be_v better_a for_o plant_n than_o other_o water_n because_o it_o have_v more_o air_n in_o it_o a_o testimony_n whereof_o the_o scale_n may_v afford_v we_o and_o this_o be_v manifest_a in_o wine_n even_o to_o sense_n from_o which_o if_o it_o be_v brisk_a and_o fresh_a and_o pour_v from_o on_o high_a into_o a_o glass_n you_o shall_v first_o see_v a_o great_a number_n of_o little_a bubble_n or_o float_a parcel_n of_o air_n rise_v up_o with_o such_o force_n as_o to_o mount_v near_o a_o foot_n above_o the_o surface_n of_o the_o wine_n but_o it_o be_v not_o enough_o for_o we_o to_o have_v prove_v great_a quantity_n of_o air_n in_o all_o mix_a body_n unless_o it_o be_v at_o the_o same_o time_n allow_v we_o that_o the_o air_n be_v actual_o and_o formal_o there_o as_o in_o the_o medium_fw-la or_o open_a air_n suffer_v nothing_o else_o but_o bare_o a_o imprisonment_n or_o confinement_n only_o which_o be_v already_o sufficient_o make_v out_o by_o the_o use_v late_o assign_v it_o in_o vegetable_n unless_o they_o may_v be_v otherways_o more_o commodious_o explain_v beside_o that_o the_o possibility_n of_o convert_v one_o substance_n into_o another_o be_v yet_o never_o so_o clear_o teach_v as_o to_o become_v intelligible_a and_o have_v at_o this_o day_n but_o few_o asserter_n of_o it_o in_o contemplation_n of_o all_o which_o particular_n and_o that_o the_o air_n alone_o of_o all_o simple_a body_n be_v capable_a of_o dilatation_n and_o constriction_n or_o call_v it_o rarity_n and_o density_n yet_o not_o by_o any_o power_n to_o move_v it_o have_v of_o its_o self_n but_o as_o it_o be_v move_v more_o or_o less_o by_o the_o presence_n or_o absence_n the_o nearness_n or_o remoteness_n of_o the_o sun_n the_o heart_n and_o centre_n of_o this_o worldly_a system_n in_o which_o we_o live_v i_o think_v it_o a_o matter_n worth_a my_o pain_n though_o perhaps_o exceed_v my_o ability_n to_o assay_v whether_o all_o fermentation_n be_v not_o reducible_a to_o this_o simple_a motion_n of_o the_o air_n and_o do_v not_o depend_v on_o it_o as_o on_o a_o general_a and_o more_o universal_a cause_n which_o if_o i_o fail_v not_o in_o it_o will_v be_v no_o very_o difficult_a matter_n to_o reduce_v all_o other_o motion_n in_o the_o world_n to_o that_o of_o fermentation_n and_o probable_o to_o resolve_v many_o hard_a question_n not_o as_o yet_o so_o right_o determine_v but_o because_o contemplation_n of_o this_o kind_n be_v in_o their_o own_o nature_n very_o unprofitable_a if_o not_o reducible_a to_o practice_v i_o have_v as_o well_o as_o i_o can_v apply_v the_o same_o to_o the_o cure_n and_o prevention_n of_o most_o disease_n as_o will_v somewhat_o more_o at_o large_a appear_v by_o the_o ensue_a treatise_n which_o i_o have_v suffer_v to_o undergo_v the_o public_a view_n with_o this_o assurance_n that_o if_o the_o foundation_n i_o build_v on_o fail_v i_o not_o i_o need_v not_o at_o all_o â—â—â—bt_n the_o superstructure_n clarissimi_fw-it viri_fw-la nathan_n henshaw_n m._n d._n opus_fw-la hoc_fw-la mole_n quidem_fw-la exiguum_fw-la sed_fw-la acumine_fw-la erudition_n cum_fw-la variâ_fw-la &_o jucundà _fw-la tum_fw-la utili_fw-la &_o nouà _fw-la succóque_fw-la plenum_fw-la relegimus_fw-la idque_fw-la cunctis_fw-la tam_fw-la medicinae_fw-la non-vulgaris_a quam_fw-la secretioris_fw-la &_o solidioris_fw-la philosophiae_fw-la studiosis_fw-la summoperè_fw-la commendamus_fw-la johannes_n stern_a m._n &_o j.u.d._n &_o m._n professor_n publicus_n in_o academiâ_fw-la dubliniensi_fw-la dat._n è_fw-la collegio_fw-la s._n &_o individ_n trin._n propter_fw-la dublinium_n calend._n julii_n 1664._o chap._n i._o of_o fermentation_n in_o general_n 1._o by_o fermentation_n i_o understand_v that_o motion_n observable_a in_o all_o compound_n or_o mix_v body_n whereby_o the_o order_n and_o situation_n of_o all_o the_o minute_n part_n of_o the_o same_o be_v continual_o change_v as_o well_o in_o respect_n of_o themselves_o as_o of_o the_o whole_a mass_n whereof_o they_o be_v part_n and_o that_o chief_o from_o a_o internal_a cause_n so_o move_v or_o dispose_v they_o without_o the_o local_a motion_n of_o the_o whole_a whether_o the_o same_o be_v accompany_v with_o any_o sensible_a heat_n in_o the_o mass_n so_o ferment_v or_o not_o 2._o that_o such_o a_o motion_n or_o fermentation_n 〈◊〉_d every_o where_o observable_a we_o need_v not_o go_v 〈◊〉_d to_o prove_v if_o we_o consider_v that_o there_o be_v scarce_o any_o thing_n sublunary_a which_o be_v subject_a to_o our_o observation_n that_o continue_v the_o least_o moment_n of_o time_n in_o the_o same_o tenor_n without_o alteration_n which_o if_o not_o observable_a to_o sense_n be_v yet_o find_v to_o be_v so_o with_o as_o little_a reason_n as_o that_o the_o shadow_n upon_o the_o dyal_n continual_o move_v on_o though_o our_o eye_n determine_v not_o till_o after_o some_o minute_n perhaps_o of_o time_n it_o become_v apparent_a that_o the_o shadow_n have_v move_v and_o then_o we_o straight_o conclude_v it_o move_v all_o the_o while_n and_o that_o the_o proportional_a part_n of_o space_n be_v commensurate_a to_o the_o respective_a moment_n in_o which_o the_o shadow_n pass_v from_o one_o term_n to_o the_o other_o if_o therefore_o all_o body_n be_v thus_o move_v or_o ferment_v at_o all_o time_n it_o follow_v that_o the_o doctrine_n of_o fermentation_n according_a to_o our_o acception_n of_o the_o word_n 〈◊〉_d manner_n as_o far_o extend_v as_o that_o of_o 〈◊〉_d itself_o i_o shall_v only_o consider_v it_o so_o 〈◊〉_d as_o it_o seem_v conducible_a and_o subservient_fw-fr to_o those_o noble_a end_n i_o have_v propose_v myself_o in_o this_o treatise_n viz._n the_o continuation_n of_o health_n the_o cure_n of_o disease_n and_o the_o retard_v of_o old_a age_n to_o say_v no_o more_o and_o not_o â—o_o promise_v too_o much_o by_o a_o new_a and_o hitherto_o unheard_a of_o method_n 3_o the_o most_o general_a property_n of_o fermentation_n be_v these_o that_o the_o mass_n so_o ferment_v suffer_v a_o eminent_a alteration_n in_o all_o its_o usual_a way_n of_o affect_v our_o sense_n as_o well_o in_o its_o first_o as_o second_o quality_n they_o be_v either_o exalt_v or_o depress_v they_o be_v sometime_o change_v for_o their_o contrary_n and_o in_o a_o word_n relation_n be_v have_v to_o our_o esteem_n of_o thing_n thus_o ferment_v all_o fermentation_n may_v be_v say_v to_o be_v either_o perfective_a or_o destructive_a though_o in_o itself_o it_o be_v but_o one_o continue_a flux_n as_o for_o instance_n in_o a_o apple_n or_o the_o like_a that_o from_o a_o green_a austere_a bud_n first_o acquire_v its_o due_a perfection_n and_o after_o by_o a_o continuation_n of_o that_o fermentation_n that_o ripen_v it_o at_o last_o arrive_v at_o corruption_n and_o so_o change_v both_o its_o name_n and_o nature_n together_o 4_o another_o eminent_a property_n of_o fermentation_n be_v that_o for_o the_o most_o part_n the_o body_n ferment_v do_v occupy_v more_o space_n than_o the_o same_o do_v before_o which_o be_v very_o evident_a in_o the_o drown_a body_n of_o man_n or_o other_o animal_n which_o though_o at_o first_o they_o go_v to_o the_o bottom_n yet_o after_o a_o certain_a time_n do_v slow_o boy_n themselves_o up_o again_o to_o the_o top_n of_o the_o water_n not_o for_o that_o the_o break_n of_o the_o gall_n become_v the_o
and_o somewhat_o long_o and_o it_o will_v soon_o appear_v that_o the_o water_n shall_v sometime_o rise_v and_o at_o other_o time_n fall_v almost_o after_o the_o manner_n of_o ordinary_a weather-glass_n as_o will_v be_v much_o more_o manifest_a if_o it_o be_v for_o a_o while_n set_v near_o the_o fire_n so_o as_o to_o be_v a_o little_a warm_v by_o it_o now_o the_o humour_n and_o juice_n of_o our_o body_n have_v likewise_o theâ—r_v certain_a proportion_n of_o air_n in_o they_o and_o that_o in_o a_o far_o great_a measure_n than_o common_a water_n which_o seem_v of_o all_o other_o liquor_n to_o contain_v the_o least_o as_o be_v probable_a from_o the_o small_a inclination_n it_o have_v to_o be_v ferment_v and_o therefore_o it_o seem_v to_o follow_v that_o upon_o all_o change_n in_o the_o air_n or_o medium_fw-la the_o juice_n of_o our_o body_n be_v affect_v even_o after_o the_o same_o manner_n as_o have_v be_v say_v of_o common_a water_n and_o that_o according_a to_o the_o alteration_n of_o the_o wether_n of_o day_n and_o night_n and_o of_o the_o season_n of_o the_o year_n which_o alteration_n or_o change_n in_o any_o one_o particular_a place_n have_v a_o kind_n of_o orderly_a method_n of_o succeed_a one_o another_o but_o much_o different_a from_o that_o of_o another_o place_n or_o region_n which_o though_o it_o have_v the_o like_a alteration_n of_o wether_n season_n etc._n etc._n yet_o the_o order_n or_o method_n of_o this_o variety_n be_v as_o it_o be_v of_o another_o scale_n from_o that_o of_o the_o former_a and_o the_o difference_n of_o heat_n and_o cold_a density_n and_o rarity_n in_o the_o medium_fw-la be_v either_o great_a or_o small_a than_o those_o of_o the_o former_a whereby_o the_o body_n remove_v from_o the_o place_n of_o its_o former_a abode_n to_o another_o be_v affect_v with_o the_o variety_n aforesaid_a after_o another_o manner_n than_o what_o be_v usual_a to_o it_o whereby_o the_o face_n if_o i_o may_v so_o say_v or_o complexion_n of_o the_o humour_n and_o juice_n in_o the_o body_n will_v be_v much_o alter_v and_o change_v from_o what_o it_o late_o be_v and_o consequent_o the_o morbose_n character_n very_o much_o deface_v if_o not_o whole_o obliterated_a which_o effect_n will_v in_o all_o probability_n more_o certain_o succeed_v upon_o often_o than_o upon_o once_o change_v the_o air_n as_o have_v be_v already_o sufficient_o evince_v both_o from_o reason_n and_o experience_n 5._o of_o all_o change_n of_o the_o air_n that_o be_v common_o observe_v to_o be_v most_o effectual_a for_o the_o cure_n of_o any_o distemper_n get_v abroad_o which_o be_v make_v by_o removal_n from_o a_o foreign_a country_n to_o a_o man_n own_o native_a soil_n or_o the_o place_n of_o his_o birth_n and_o first_o abode_n which_o seem_v to_o be_v true_a caeteris_fw-la paribus_fw-la from_o hence_o that_o the_o aerious_a particle_n which_o original_o go_v as_o one_o principal_a ingredient_n to_o the_o make_v up_o of_o the_o body_n be_v at_o first_o of_o the_o same_o tone_n exact_o with_o that_o of_o the_o medium_fw-la and_o it_o can_v be_v imagine_v but_o that_o upon_o any_o considerable_a removal_n these_o airy_a particle_n must_v be_v more_o or_o less_o dilate_a or_o contract_v than_o they_o former_o be_v whereby_o the_o body_n will_v be_v preternatural_o affect_v which_o though_o during_o the_o state_n of_o health_n it_o be_v not_o cause_v sufficient_a perhaps_o to_o manifest_o hinder_v any_o action_n of_o the_o body_n yet_o in_o case_n of_o a_o disease_n it_o seem_v to_o be_v a_o notable_a relief_n to_o nature_n to_o be_v restore_v again_o to_o its_o native_a constitution_n as_o far_o as_o be_v possible_a which_o be_v a_o kind_n of_o renew_v and_o no_o small_a refreshment_n to_o the_o body_n from_o whence_o a_o patient_n seldom_o fail_v of_o a_o relief_n and_o very_o often_o find_v a_o perfect_a cure_n in_o several_a contumacious_a disease_n 6._o i_o will_v not_o be_v so_o far_o misunderstand_v as_o if_o i_o assert_v the_o alteration_n our_o body_n suffer_v from_o the_o medium_fw-la to_o be_v exact_o the_o same_o in_o degree_n with_o those_o of_o the_o weatherglass_n for_o that_o i_o think_v be_v hardly_o consistent_a with_o perfect_a health_n as_o we_o find_v these_o alteration_n in_o most_o person_n be_v though_o in_o infirm_a body_n they_o be_v very_o manifest_a but_o i_o suppose_v by_o this_o time_n it_o may_v be_v expect_v from_o i_o that_o i_o give_v a_o account_n of_o this_o difference_n and_o say_v how_o it_o come_v to_o pass_v that_o the_o air_n in_o our_o body_n be_v not_o affect_v by_o the_o medium_fw-la exact_o after_o the_o manner_n of_o the_o weatherglass_n but_o in_o a_o less_o degree_n where_o for_o the_o only_a reason_n i_o can_v think_v of_o i_o shall_v assign_v the_o tone_n or_o tonical_a motion_n of_o every_o body_n so_o often_o mention_v which_o be_v compressive_a of_o all_o the_o part_n of_o our_o body_n it_o very_o considerable_o check_v and_o hinder_v that_o dilation_n of_o the_o humour_n by_o mean_n of_o the_o rarefy_v air_n which_o will_v otherwise_o ensue_v upon_o the_o like_a affection_n of_o the_o medium_fw-la which_o compression_n or_o resistance_n of_o the_o tone_n or_o tonical_a motion_n of_o the_o body_n may_v be_v very_o well_o illustrate_v from_o a_o bottle_n full_a of_o nothing_o but_o air_n well_o stop_v and_o afterward_o expose_v to_o the_o difference_n of_o heat_n and_o cold_a in_o which_o case_n it_o can_v be_v imagine_v that_o the_o include_v air_n be_v at_o all_o either_o dilate_a or_o contract_v not_o the_o first_o because_o there_o be_v no_o room_n for_o it_o to_o expand_v itself_o upon_o nor_o yet_o the_o last_o because_o the_o side_n of_o the_o bottle_n be_v not_o apt_a to_o subside_o without_o which_o no_o sufficient_a reason_n can_v be_v give_v why_o the_o air_n upon_o external_a cold_n shall_v quit_v any_o part_n of_o the_o place_n it_o former_o replenish_v and_o yet_o in_o some_o case_n the_o difference_n of_o heat_n and_o cold_a may_v be_v so_o great_a as_o to_o prevail_v over_o the_o strength_n of_o a_o ordinary_a bottle_n and_o break_v it_o as_o have_v be_v often_o find_v by_o experience_n but_o here_o we_o must_v observe_v that_o though_o the_o side_n of_o the_o bottle_n give_v no_o way_n at_o all_o to_o the_o air_n include_v yet_o the_o tonical_a power_n of_o the_o body_n do_v somewhat_o yield_v to_o such_o alteration_n of_o the_o humour_n and_o that_o more_o or_o less_o according_a to_o its_o different_a strength_n in_o the_o body_n of_o this_o or_o that_o individual_a nor_o do_v this_o experiment_n of_o the_o bottle_n sufficient_o conclude_v but_o that_o at_o least_o the_o compression_n of_o the_o air_n in_o our_o body_n aught_o to_o answer_v that_o of_o the_o medium_fw-la and_o indeed_o that_o it_o do_v not_o seem_v to_o proceed_v from_o the_o internal_a heat_n in_o the_o humour_n of_o animal_n maintain_v as_o be_v say_v in_o the_o chapter_n of_o sanguification_n which_o be_v of_o power_n sufficient_a not_o only_o to_o resist_v the_o compression_n of_o the_o tone_n or_o tonical_a motion_n of_o the_o habit_n of_o the_o body_n but_o that_o of_o the_o medium_n also_o and_o shall_v the_o contrary_a happen_v death_n will_v inevitable_o ensue_v 7._o it_o may_v be_v far_o note_v that_o all_o body_n whether_o man_n or_o other_o animal_n be_v not_o equal_o affect_v with_o the_o same_o change_n or_o alteration_n in_o the_o medium_fw-la but_o as_o have_v be_v say_v proportionable_o to_o the_o strength_n of_o the_o tonical_a power_n of_o each_o body_n and_o thus_o it_o happen_v that_o a_o person_n of_o a_o robu_v constitution_n and_o habit_n of_o body_n whether_o such_o natural_o or_o acquire_v by_o much_o travel_n and_o labour_n will_v with_o less_o trouble_n and_o hazard_v of_o his_o health_n endure_v any_o notable_a alteration_n or_o change_v of_o wether_n or_o soil_n than_o another_o of_o a_o fine_a texture_n and_o composure_n and_o who_o tone_n consequent_o be_v not_o so_o resistive_a of_o the_o impression_n from_o without_o as_o that_o of_o the_o former_a and_o thus_o it_o be_v easy_a to_o conceive_v why_o a_o person_n inhabit_v near_o either_o of_o the_o pole_n of_o the_o earth_n and_o remove_v to_o or_o near_o the_o equator_fw-la or_o the_o contrariwise_o will_v find_v the_o temper_n of_o that_o clime_n more_o troublesome_a and_o offensive_a to_o his_o health_n than_o he_o shall_v that_o from_o the_o middle_n temperate_a region_n shall_v transfer_v himself_o to_o either_o of_o the_o extreme_n and_o no_o doubt_n the_o less_o the_o difference_n be_v the_o easy_a and_o soon_o shall_v a_o man_n nature_n be_v bring_v to_o comply_v with_o it_o and_o thus_o we_o observe_v that_o spaniard_n and_o portugeze_n do_v with_o less_o danger_n travel_n and_o trade_n into_o the_o more_o southern_a region_n of_o the_o world_n than_o northern_a man_n can_v do_v