the_o answer_n i_o receive_v from_o a_o very_a ingenious_a gentleman_n who_o live_v among_o mine_n and_o be_v not_o a_o little_a concern_v in_o some_o of_o they_o for_o have_v inquire_v of_o he_o what_o he_o have_v observe_v about_o the_o lie_a or_o not_o lie_v of_o the_o snow_n on_o the_o mineral_n soil_v near_o the_o place_n of_o his_o residence_n he_o reply_v that_o in_o some_o of_o they_o he_o do_v not_o take_v notice_n of_o any_o peculiar_a indisposition_n to_o let_v the_o ice_n and_o snow_n continue_v on_o they_o which_o i_o conceive_v may_v proceed_v either_o from_o the_o want_n of_o such_o mineral_n in_o the_o subjacent_a part_n as_o be_v then_o in_o the_o state_n of_o incalescence_n or_o else_o from_o this_o that_o according_a to_o what_o we_o have_v elsewhere_o observe_v about_o the_o snow_n on_o aetna_n the_o direct_a ascension_n of_o the_o hot_a steam_n be_v hinder_v by_o some_o layer_n of_o rock_n or_o other_o stone_n through_o which_o the_o steam_n can_v not_o penetrate_v or_o can_v do_v it_o but_o so_o slow_o as_o to_o loose_v their_o actual_a warmth_n by_o the_o way_n but_o this_o gentleman_n add_v that_o in_o other_o place_n near_o that_o of_o his_o abode_n and_o such_o as_o he_o know_v to_o have_v minerall-vein_n beneath_o they_o he_o observe_v that_o the_o snow_n nor_o the_o ice_n will_v scarce_o continue_v at_o all_o upon_o the_o surface_n of_o the_o ground_n even_o in_o a_o extraordinary_o cold_a winter_n it_o will_v be_v a_o considerable_a instance_n to_o our_o purpose_n if_o it_o be_v indeed_o true_a which_o some_o learned_a man_n have_v write_v that_o near_o the_o gold-mine_n in_o hungary_n the_o leaf_n of_o the_o tree_n especial_o those_o that_o respct_v the_o ground_n be_v oftentimes_o find_v ennoble_v with_o a_o golden-colour_n from_o the_o metalline_a exhalation_n of_o the_o gold-mine_n which_o one_o will_v think_v must_v by_o reason_n of_o their_o ponderousnesse_n need_v a_o considerable_a heat_n to_o elevate_v they_o especial_o into_o the_o open_a air._n but_o though_o doubt_v of_o this_o relation_n as_o not_o make_v by_o mineralist_n or_o accurate_a observer_n i_o inquire_v about_o it_o of_o a_o person_n who_o curiosity_n carry_v he_o purposely_o to_o visit_v those_o mine_n i_o be_v answer_v that_o he_o can_v not_o be_v a_o witness_n to_o the_o truth_n of_o the_o observation_n yet_o he_o tell_v i_o a_o observation_n which_o i_o else_o where_o mention_n that_o do_v not_o discountenance_v that_o tradition_n if_o it_o be_v object_v that_o what_o have_v hitherto_o be_v say_v about_o latent_fw-la fire_n and_o heat_n in_o the_o bowel_n of_o the_o earth_n will_v give_v a_o account_n of_o the_o warmth_n only_o of_o those_o place_n that_o be_v within_o teach_v of_o the_o action_n of_o such_o magazine_n of_o heat_n which_o probable_o may_v be_v want_v in_o many_o place_n of_o the_o earth_n i_o shall_v ready_o confess_v that_o as_o i_o first_o make_v this_o objection_n to_o myself_o so_o i_o do_v not_o yet_o discern_v it_o to_o be_v unreasonable_a and_o that_o for_o aught_o i_o know_v if_o man_n have_v occasion_n to_o dig_v as_o deep_a and_o be_v as_o far_o conversant_a in_o many_o other_o low_a place_n of_o the_o earth_n where_o there_o be_v no_o sign_n of_o mineral_n as_o they_o have_v do_v where_o the_o hope_n of_o actual_a discovery_n of_o vein_n of_o metal_n and_o other_o mineral_n worth_a work_n have_v invite_v they_o divers_a place_n in_o the_o three_o region_n of_o the_o earth_n will_v be_v meet_v with_o that_o will_v bedestitute_a of_o the_o warmth_n that_o have_v hitherto_o be_v general_o find_v in_o place_n of_o the_o same_o region_n that_o either_o abound_v with_o mineral_n themselves_o or_o be_v near_o some_o of_o the_o deep_a and_o latent_fw-la aestuary_n abovementioned_a and_o as_o for_o those_o part_n of_o the_o three_o region_n of_o the_o earth_n which_o man_n feel_v not_o only_o warm_a but_o troublesom_o hot_a that_o incommodious_a degree_n of_o heat_n seem_v not_o at_o least_o in_o 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consirm_v not_o only_o by_o the_o sulphureous_a and_o saline_n part_n they_o abound_v with_o and_o by_o this_o that_o many_o of_o they_o may_v be_v wrought_v on_o as_o we_o have_v try_v both_o by_o simple_a water_n and_o even_o by_o moist_a air_n which_o argue_v the_o resolublenesse_n of_o their_o constitution_n but_o also_o by_o this_o that_o have_v purposely_o inquire_v of_o a_o gentleman_n that_o go_v out_o of_o curiosity_n to_o visit_v one_o of_o the_o deep_a hungarian_a mine_v he_o confirm_v to_o i_o what_o i_o have_v otherwise_o be_v inform_v of_o by_o answer_v i_o that_o in_o the_o low_a part_n of_o the_o mâ—ne_n he_o have_v gather_v vitriol_n that_o appear_v above_o ground_n to_o be_v of_o a_o golden_a nature_n and_o that_o in_o a_o cave_n that_o be_v on_o one_o side_n of_o the_o groove_n in_o the_o deep_a gold-mine_n near_o cremnitzo_n the_o corrosive_a smell_n be_v so_o strong_a and_o noxious_a that_o man_n have_v not_o dare_v to_o dig_v out_o the_o native_a gold_n it_o rich_o abound_v with_o be_v deter_v by_o the_o ill_a fate_n of_o liver_n that_o venture_v to_o work_v in_o it_o add_v that_o though_o he_o pass_v by_o it_o in_o great_a haste_n yet_o he_o can_v not_o avoid_v the_o be_v offend_v by_o the_o noisome_a exhalation_n and_o on_o this_o occasion_n it_o will_v not_o be_v i_o presume_v dislike_v if_o i_o illustrate_v what_o i_o be_v save_v of_o immature_n mineral_n by_o subjoin_v that_o have_v ask_v this_o chemist_n whether_o the_o vitriol_n he_o find_v very_o deep_a underground_n be_v all_o solid_a or_o some_o of_o it_o soft_a he_o affirm_v that_o as_o he_o gather_v it_o he_o find_v some_o of_o it_o soft_a and_o to_o satisfy_v my_o curiosity_n to_o know_v whether_o it_o continue_v that_o yield_a consistence_n he_o further_o tell_v i_o that_o it_o be_v soft_a in_o the_o deep_a part_n of_o the_o i_o but_o when_o he_o have_v bring_v it_o into_o the_o superterrestriall_a air_n it_o harden_v there_o and_o appear_v to_o have_v 9_o divers_a golden_a streak_n in_o it_o chap._n x._o one_o thing_n there_o be_v which_o must_v not_o be_v here_o omit_v though_o it_o will_v probable_o be_v great_a news_n to_o those_o that_o philosophise_v only_o in_o their_o study_n and_o have_v not_o receive_v information_n from_o any_o that_o visit_v the_o deep_a part_n of_o the_o earth_n the_o phaenomenon_n be_v this_o that_o the_o digger_n in_o mine_n have_v find_v by_o unwelcome_a experience_n that_o in_o deep_a grooves_n the_o air_n unless_o ventilate_v and_o renew_v do_v in_o a_o short_a time_n become_v unfit_a for_o respiration_n have_v be_v put_v upon_o this_o expedient_a to_o sink_v at_o some_o convenient_a distance_n from_o the_o groove_n where_o the_o miners_n work_n another_o pit_n by_o some_o call_v a_o vent_n pit_n that_o usual_o tend_v direct_o downward_o though_o sometime_o it_o make_v angel_n to_o which_o our_o english-minemen_a do_v in_o several_a part_n of_o this_o kingdom_n give_v differ_v name_n whereof_o the_o most_o signisicant_a seem_v to_o be_v that_o give_v it_o in_o the_o leadmine_v of_o darbyshire_n where_o they_o call_v it_o a_o air-shaft_n and_o be_v wont_a to_o make_v it_o 40_o 50_o and_o sometime_o 80_o or_o 100_o pace_n off_o and_z as_o one_o of_o the_o chief_a and_o skilful_a miner_n there_o inform_v i_o as_o deep_o as_o the_o groove_n or_o well_o though_o i_o find_v that_o the_o best_a german_n and_o some_o english_a miner_n think_v a_o less_o depth_n will_v often_o suffice_v from_o this_o air-shaft_n to_o the_o groove_n the_o man_n work_v in_o there_o pass_v a_o channel_n or_o if_o i_o may_v so_o call_v it_o ventiduct_n to_o convey_v the_o air_n from_o the_o former_a to_o the_o latter_a which_o be_v that_o that_o agricola_n sometime_o for_o he_o employ_v not_o the_o term_n always_o in_o the_o same_o sense_n denote_v
the_o tract_n here_o point_v at_o be_v a_o discourse_n of_o subterraneal_a fire_n and_o heat_n that_o many_o of_o they_o will_v conceive_v a_o very_a considerable_a degree_n of_o heat_n will_v it_o not_o be_v very_o probable_a that_o the_o temperature_n of_o the_o earth_n in_o the_o place_n that_o abound_v with_o these_o marchasiticall_a mineral_n will_v be_v very_o warm_a in_o comparison_n of_o the_o temperature_n of_o the_o other_o place_n where_o the_o soil_n do_v plentiful_o produce_v nitrous_a and_o other_o refrigerate_a body_n though_o both_o the_o place_n be_v suppose_v to_o be_v at_o the_o same_o distance_n from_o the_o surface_n of_o the_o earth_n and_o consequent_o in_o the_o same_o subterraneous_a region_n upon_o the_o like_a ground_n it_o may_v also_o be_v suspect_v that_o in_o the_o same_o place_n the_o temperature_n may_v not_o be_v always_o the_o same_o even_o upon_o the_o account_n of_o the_o soil_n for_o i_o elsewhere_o show_v that_o some_o saline_n earth_n especial_o nitrous_a and_o some_o mineral_n that_o partake_v of_o the_o nature_n of_o marchasite_n admit_v a_o kind_n of_o gradual_a maturation_n and_o perhaps_o other_o change_n that_o seem_v to_o be_v spontaneous_a and_o that_o such_o change_n happen_v the_o more_o notable_o in_o those_o part_n of_o such_o body_n that_o be_v expose_v to_o the_o air_n as_o those_o be_v that_o chance_n to_o be_v place_v at_o the_o side_n of_o the_o deep_a well_n we_o be_v talk_v of_o which_o thing_n be_v presuppose_v it_o will_v not_o be_v absurd_a to_o conceive_v that_o the_o mineral_n to_o which_o either_o heat_n or_o cold_a be_v to_o be_v refer_v may_v be_v more_o copious_a ripe_a and_o operative_a at_o one_o time_n then_o at_o another_o or_o that_o at_o length_n all_o the_o earth_n capable_a of_o be_v as_o it_o be_v assimilate_v by_o the_o mineral_n rudiment_n harbour_v in_o it_o may_v be_v consume_v or_o the_o mineral_n itself_o may_v arrive_v at_o a_o perfection_n of_o maturity_n which_o will_v make_v its_o texture_n so_o close_o as_o to_o be_v unfit_a to_o be_v penetrate_v and_o wrought_v upon_o as_o before_z by_o the_o water_n or_o other_o liquor_n that_o occasion_v its_o incalescence_n chap_n vii_o i_o omit_v to_o speak_v of_o the_o transient_a change_n that_o may_v be_v occasion_v in_o the_o temperature_n of_o the_o second_o region_n of_o the_o earth_n by_o several_a accident_n and_o especial_o by_o the_o subterraneal_a exhalation_n that_o in_o some_o place_n and_o time_n copious_o ascend_v out_o of_o the_o low_a region_n of_o the_o earth_n nor_o shall_v i_o insist_v upon_o any_o of_o the_o other_o cause_n of_o a_o more_o durable_a difference_n of_o temper_n in_o some_o part_n of_o the_o second_o region_n such_o as_o may_v be_v the_o vicinity_n of_o subterraneal_a fire_n in_o the_o three_o region_n that_o heat_n the_o incumbent_a soil_n because_o i_o will_v hasten_v to_o the_o three_o and_o last_o part_n of_o this_o discourse_n which_o yet_o i_o must_v not_o do_v without_o premise_v this_o advertisement_n that_o i_o think_v myself_o oblige_v to_o speak_v the_o more_o hesitant_o and_o diffident_o about_o the_o temperature_n of_o subterraneal_a air_n because_o mineralist_n have_v not_o have_v the_o curiosity_n to_o examine_v it_o by_o weather-glass_n which_o will_v give_v we_o much_o more_o trusty_a information_n than_o our_o sense_n of_o feel_v powerful_o preaffect_v by_o the_o cold_a or_o heat_n of_o the_o external_a air._n i_o do_v indeed_o send_v fit_a instrument_n to_o some_o day_n journey_n from_o this_o place_n to_o examine_v the_o air_n at_o the_o bottom_n of_o some_o of_o our_o deep_a mine_n but_o through_o some_o unlucky_a casualty_n upon_o the_o place_n the_o attempt_n miscarry_v but_o when_o i_o shall_v god_n assist_v recover_v a_o opportunity_n that_o i_o have_v since_o want_v i_o hope_v a_o accurate_a seal_a weatherglass_n join_v with_o a_o portable_a baroscope_n will_v give_v i_o better_a information_n than_o mineralist_n have_v yet_o do_v i_o say_v a_o seal_a weatherglass_n because_o though_o common_a thermoscope_n have_v be_v employ_v by_o miner_n i_o dare_v not_o rely_v upon_o they_o be_v persuade_v by_o trial_n purposely_o make_v as_o well_o as_o by_o the_o reason_n of_o the_o thing_n of_o the_o fallaciousnesse_n of_o such_o thermoscope_n for_o in_o they_o the_o include_v air_n be_v liable_a to_o be_v wrought_v upon_o not_o only_o by_o the_o heat_n and_o coldness_n but_o by_o the_o weight_n or_o pressure_n of_o the_o external_a air._n so_o that_o if_o a_o thermoscope_n be_v let_v down_o from_o a_o very_a considerable_a height_n at_o the_o top_n of_o which_o the_o station_n of_o the_o pendulous_a liquor_n be_v well_o mark_v that_o liquor_n will_v be_v find_v to_o have_v rise_v when_o the_o instrument_n rest_v at_o the_o bottom_n as_o if_o the_o include_v air_n be_v manifest_o refrigerated_a though_o the_o temper_n of_o the_o external_a air_n may_v be_v in_o both_o place_n alike_o the_o cause_n of_o the_o pendulous_a liquor_n rise_v be_v indeed_o that_o the_o aereall_a pillar_n incumbent_a on_o the_o stagnant_a liquor_n be_v high_a and_o heavy_a at_o the_o bottom_n where_o the_o instrument_n rest_v then_o that_o which_o lean_v upon_o it_o at_o its_o first_o or_o upper_a station_n near_o the_o top_n of_o the_o atmosphere_n from_o whence_o it_o will_v be_v easy_a to_o conclude_v that_o at_o the_o bottom_n of_o a_o deep_a groove_n where_o the_o atmosphericall_a pillar_n that_o press_v the_o stagnant_a water_n will_v be_v much_o long_o and_o heavy_a than_o at_o the_o top_n the_o air_n may_v appear_v by_o the_o instrument_n to_o be_v cold_a in_o place_n where_o it_o be_v real_o much_o hot_a the_o increase_a weight_n of_o the_o incumbent_a air_n be_v more_o forcible_a to_o impel_v up_o the_o pendulous_a liquor_n than_o the_o endeavour_n of_o expansion_n procure_v in_o the_o include_v air_n by_o the_o warmth_n of_o the_o place_n be_v to_o depress_v it_o chap._n viii_o that_o which_o challenge_v the_o three_o and_o last_o part_n of_o my_o discourse_n be_v the_o lowermost_a region_n of_o the_o earth_n about_o who_o temperature_n i_o shall_v comprise_v what_o i_o have_v to_o say_v in_o the_o follow_a proposition_n proposition_n the_o 4._o the_o three_o region_n of_o the_o earth_n have_v be_v observe_v to_o be_v constant_o and_o sensible_o warm_a but_o not_o uniform_o so_o be_v in_o some_o place_n considerable_o hot_a i_o mention_v that_o the_o recite_v temperature_n have_v be_v observe_v in_o the_o low_a region_n because_o i_o will_v intimate_v that_o i_o will_v have_v the_o proposition_n understand_v with_o this_o limitation_n as_o far_o as_o have_v be_v yet_o that_o i_o know_v of_o observe_v for_o almost_o all_o the_o deep_a grooves_n that_o mineralist_n have_v give_v we_o account_n of_o and_o wherein_o man_n have_v wrought_v long_o enough_o to_o take_v sufficient_a notice_n of_o the_o temperature_n of_o the_o air_n have_v be_v make_v in_o soil_n furnish_v with_o metalline_a oar_n or_o other_o mineral_n without_o which_o man_n will_v not_o be_v invite_v to_o be_v at_o so_o great_a a_o charge_n as_o that_o of_o sink_v so_o very_o deep_a pit_n and_o maintain_v workman_n in_o they_o so_o that_o experience_n have_v yet_o but_o slender_o or_o at_o least_o not_o sufficient_o inform_v we_o of_o the_o temperature_n of_o those_o part_n of_o the_o three_o region_n of_o the_o earth_n that_o be_v not_o furnish_v with_o ponderous_a mineral_n and_o consequent_o have_v not_o inform_v we_o of_o the_o temperature_n of_o the_o lowermost_a region_n in_o general_a as_o will_n better_o appear_v by_o what_o i_o shall_v ere_o long_o represent_v have_v premise_v this_o advertisement_n about_o our_o proposition_n we_o may_v proceed_v to_o the_o distinct_a proof_n of_o the_o two_o part_n or_o member_n it_o consist_v of_o and_o to_o begin_v with_o the_o first_o whatever_o the_o peripatetic_n teach_v of_o the_o innate_a coldness_n of_o the_o earth_n especial_o where_o it_o be_v remote_a from_o the_o mixture_n of_o the_o other_o element_n yet_o have_v purposely_o inquire_v of_o several_a person_n that_o visit_v and_o also_o frequent_v the_o three_o region_n in_o differ_v country_n soil_n and_o at_o differ_v depth_n under_o ground_n and_o season_n of_o the_o year_n i_o do_v not_o perceive_v that_o any_o of_o they_o have_v ever_o find_v it_o sensible_o and_o troublesome_a cold_a in_o the_o three_o region_n of_o the_o earth_n and_o on_o this_o occasion_n i_o remember_v i_o have_v some_o light_a suspicion_n that_o at_o least_o in_o some_o case_n the_o narrowness_n of_o the_o cavity_n wherein_o the_o digger_n be_v in_o divers_a place_n reduce_v to_o work_v may_v make_v the_o warmth_n they_o feel_v proceed_v in_o great_a part_n from_o the_o steam_n of_o their_o own_o body_n and_o perhaps_o of_o the_o mineral_n and_o from_o the_o difficulty_n of_o cool_v or_o ventilate_v the_o blood_n in_o a_o
air_n clog_v with_o steam_n and_o i_o be_v the_o rather_o induce_v to_o think_v this_o possible_a because_o i_o have_v even_o in_o metalline_a mine_n that_o be_v but_o shallow_a and_o very_o free_o accessible_a to_o the_o air_n observe_v a_o strong_a smell_n of_o the_o metal_n abound_v there_o i_o have_v likewise_o find_v by_o several_a trial_n that_o the_o exhalation_n that_o proceed_v from_o the_o body_n of_o animal_n do_v so_o vitiate_v the_o air_n they_o abound_v in_o as_o to_o make_v it_o much_o less_o fit_a for_o their_o respiration_n and_o to_o be_v apt_a to_o make_v they_o sick_a and_o faint_a wherefore_o i_o think_v it_o not_o altogether_o unfit_a to_o inquire_v whether_o the_o heat_n of_o the_o subterraneal_a air_n in_o such_o place_n as_o have_v be_v new_o mention_v may_v not_o be_v refer_v to_o these_o cause_n but_o i_o be_v answer_v in_o the_o negative_a especial_o by_o a_o inquisitive_a person_n that_o have_v be_v in_o the_o deep_a and_o hot_a mine_n that_o have_v be_v visit_v by_o any_o acquaintance_n of_o i_o this_o way_n of_o account_v for_o the_o subterraneal_a warmth_n be_v lay_v aside_o it_o seem_v i_o confess_v somewhat_o difficult_a to_o conceive_v how_o it_o shall_v be_v produce_v yet_o two_o principal_a cause_n there_o be_v to_o which_o i_o think_v we_o may_v probable_o refer_v the_o temperature_n of_o those_o place_n where_o the_o air_n be_v but_o moderate_o warm_a to_o which_o a_o three_o be_v to_o be_v add_v when_o we_o come_v to_o give_v a_o account_n why_o some_o place_n be_v troublesom_o hot_a and_o first_o why_o the_o coldness_n of_o winter_n shall_v not_o be_v feel_v in_o the_o lowermost_a region_n of_o the_o earth_n may_v be_v that_o the_o air_n there_o be_v too_o remote_a from_o the_o superterrestriall_a air_n to_o be_v much_o affect_v with_o those_o adventitious_a cause_n of_o cold_a that_o make_v that_o quality_n intense_a in_o the_o air_n above_o ground_n but_o because_o this_o reason_n show_v rather_o why_o it_o shall_v not_o be_v in_o the_o earth_n low_a region_n much_o cold_o in_o winter_n then_o in_o summer_n but_o not_o why_o it_o shall_v be_v in_o all_o season_n warm_a there_o i_o shall_v add_v as_o a_o conjecture_n that_o the_o positive_a cause_n of_o the_o actual_a warmth_n may_v proceed_v from_o those_o deep_a part_n of_o the_o subterraneal_a region_n which_o lie_v beneath_o those_o place_n which_o man_n have_v yet_o have_v occasion_n and_o ability_n to_o dig_v for_o it_o seem_v probable_a to_o i_o that_o in_o these_o yet_o inpenetrate_v bowel_n of_o the_o earth_n there_o be_v great_a storehouse_n of_o either_o actual_a fire_n or_o place_n considerable_o hot_a or_o in_o some_o region_n of_o both_o from_o which_o reconditory_n if_o i_o may_v so_o call_v they_o or_o magazine_n of_o hypogeall_a heat_n that_o quality_n be_v communicate_v especial_o by_o subterraneal_a channel_n cleft_n fibres_n or_o other_o conveyance_n to_o the_o less_o deep_a part_n of_o the_o earth_n either_o by_o a_o propagation_n of_o heat_n through_o the_o substance_n of_o the_o interpose_a part_n of_o the_o soil_n as_o when_o the_o upper_a part_n of_o a_o oven_n be_v remiss_o heat_v by_o the_o same_o agent_n that_o produce_v a_o intense_a heat_n in_o the_o cavity_n or_o by_o a_o more_o easy_a diffusion_n of_o the_o fire_n or_o heat_n through_o the_o above_o mention_v conveyance_n as_o may_v be_v exemplify_v by_o the_o pipe_n that_o convey_v heat_n in_o some_o chemical_a structure_n or_o else_o which_o be_v perhaps_o the_o most_o usual_a way_n by_o send_v upward_o hot_a mineral_n exhalation_n and_o steam_n which_o by_o reason_n of_o the_o comparative_o heavy_a material_n they_o consist_v of_o and_o by_o reason_n of_o their_o being_n less_o disperse_v near_o the_o place_n whence_o they_o proceed_v be_v usual_o more_o plentiful_a in_o the_o deep_a part_n of_o the_o earth_n and_o somewhat_o affect_v they_o with_o the_o quality_n that_o they_o bring_v from_o the_o workhouse_n where_o they_o be_v form_v and_o that_o they_o retain_v for_o some_o time_n after_o chap._n ix_o that_o manifest_a steam_n oftentimes_o be_v find_v in_o grooves_n especial_o in_o deep_a one_o be_v evident_a by_o the_o damp_n that_o infest_v most_o of_o they_o and_o that_o in_o distant_a region_n as_o in_o several_a province_n of_o germany_n bohemia_n hungary_n etc._n etc._n as_o also_o in_o several_a part_n of_o england_n in_o grooves_n some_o of_o which_o i_o have_v receive_v relation_n from_o the_o mine-man_n themselves_o by_o which_o it_o appear_v that_o several_a of_o these_o exhalation_n ascend_v from_o the_o entrails_n of_o the_o earth_n be_v sulphureous_a &_o bituminous_a in_o smell_n and_o in_o some_o grooves_n one_o whereof_o i_o elsewhere_o mention_v myself_o to_o have_v visit_v these_o steam_n be_v apt_a actual_o to_o take_v fire_n the_o warmth_n of_o many_o subterraneal_a exhation_n i_o think_v may_v be_v make_v further_o probable_a by_o some_o other_o observation_n for_o though_o these_o new_o mention_v be_v not_o to_o be_v reject_v and_o may_v be_v employ_v for_o want_v of_o better_a yet_o i_o have_v several_a time_n question_v whether_o i_o ought_v to_o acquiesce_v in_o they_o alone_o for_o i_o do_v not_o think_v the_o easy_a inflammableness_n of_o body_n to_o be_v always_o a_o sure_a proof_n of_o the_o actual_a sensible_a warmth_n of_o the_o minute_n part_v it_o consist_v of_o or_o may_v be_v reduce_v into_o for_o though_o saltpetre_n be_v very_o inflammable_a yet_o be_v by_o a_o solution_n in_o fair_a water_n reduce_v to_o invisible_a corpuscle_n it_o high_o refrigerate_v that_o liquor_n nor_o have_v i_o observe_v its_o fume_n when_o far_o from_o the_o fire_n to_o have_v any_o heat_n sensible_a to_o our_o touch._n and_o the_o like_a may_v be_v say_v of_o the_o exhalation_n of_o high_o rectify_v spirit_n of_o wine_n which_o yet_o we_o know_v be_v itself_o total_o inflammable_a nay_o i_o know_v not_o whither_o for_o a_o reason_n elsewhere_o declare_v copious_a exhalation_n may_v not_o ascend_v from_o the_o low_a part_n of_o the_o earth_n and_o yet_o be_v rather_o cold_a than_o hot._n for_o in_o another_o paper_n i_o mention_v a_o way_n by_o which_o i_o make_v a_o mixture_n that_o plentiful_o enough_o enit_v steam_n of_o who_o be_v rather_o of_o a_o cold_a then_o hot_a nature_n there_o be_v this_o probability_n that_o the_o mixture_n whence_o they_o ascend_v even_o whil_v its_o component_a ingredient_n be_v brisk_o act_v upon_o one_o another_o be_v not_o only_o sensible_o but_o considerable_o cold._n one_o main_a thing_n therefore_o that_o induce_v i_o to_o assent_v to_o the_o opinion_n whereto_o the_o former_a instance_n do_v but_o incline_v i_o be_v that_o have_v purposely_o inquire_v of_o a_o observe_a man_n that_o frequent_v deep_a mine_n wherein_o he_o have_v a_o considerable_a share_n he_o answer_v i_o that_o he_o plain_o observe_v the_o fume_n that_o come_v out_o of_o the_o mouth_n of_o the_o deep_a pit_n to_o be_v actual_o and_o sensible_o warm_a and_o that_o in_o a_o warm_a season_n of_o the_o year_n and_o morinus_n above_o cite_v speak_v of_o the_o deep_a hungarian-mine_n make_v it_o the_o first_o epithet_n of_o the_o copious_a exhalation_n that_o ascend_v from_o the_o bottom_n that_o it_o be_v hot_a and_o a_o few_o page_n after_o he_o say_v that_o at_o the_o mouth_n of_o the_o well_o the_o ascend_a fume_n be_v sensible_o hot_a in_o summer_n itself_o and_o the_o same_o argument_n that_o i_o have_v elsewhere_o give_v to_o show_v that_o there_o be_v very_o hot_a place_n and_o as_o it_o be_v aestuary_n in_o the_o bowel_n of_o the_o earth_n may_v serve_v to_o make_v it_o probable_a that_o the_o steam_n ascend_v thence_o may_v be_v actual_o warm_a that_o also_o in_o many_o place_n of_o the_o earth_n where_o no_o grooves_n be_v dug_n and_o no_o visible_a exhalation_n be_v take_v notice_n of_o they_o may_v yet_o pervade_v the_o soil_n and_o exercise_v some_o operation_n of_o warmth_n may_v be_v probable_a by_o this_o that_o the_o experience_a agricola_n himself_o reckon_v it_o among_o the_o sign_n of_o a_o latent_fw-la mineral_n vein_n that_o the_o hoar-frost_n do_v not_o lie_v upon_o that_o tract_n of_o the_o surface_n of_o the_o earth_n under_o which_o a_o vein_n though_o perhaps_o very_o deep_a run_v the_o like_a direction_n i_o have_v know_v give_v by_o the_o skilful_a in_o england_n for_o the_o discovery_n of_o place_n that_o contain_v coal-mine_n and_o i_o remember_v a_o near_a relation_n of_o i_o show_v i_o a_o great_a scope_n of_o land_n of_o he_o which_o though_o in_o a_o outward_a appearance_n likely_a to_o be_v as_o cold_a as_o any_o place_n thereabouts_o he_o affirm_v will_v not_o suffer_v snow_n to_o lie_v upon_o it_o above_o a_o day_n or_o two_o in_o the_o midst_n of_o winter_n the_o probability_n of_o which_o relation_n be_v confirm_v to_o i_o by_o