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the_o mouth_n of_o the_o groove_n and_o that_o this_o cold_a region_n last_v till_o he_o come_v somewhat_o near_o the_o bottom_n which_o be_v estimate_v to_o be_v about_o a_o 100_o fathom_n or_o more_o distant_a in_o a_o strait_a line_n from_o the_o top._n this_o relation_n agree_v well_o enough_o for_o the_o main_a with_o that_o short_a but_o considerable_a one_o of_o morinus_n which_o i_o elsewhere_o cite_v who_o above_o forty_o five_o year_n ago_o visit_v the_o deep_a hungarian-mine_n in_o the_o month_n of_o july_n and_o take_v notice_n that_o when_o he_o come_v down_o to_o the_o burrow_n as_o he_o call_v they_o he_o do_v not_o find_v any_o heat_n as_o at_o the_o mouth_n of_o the_o well_o but_o the_o begin_n of_o a_o very_a cold_a as_o well_o as_o considerable_o thick_a region_n though_o i_o
easy_o believe_v he_o when_o he_o confess_v that_o he_o feel_v it_o much_o the_o cold_o because_o he_o have_v leave_v of_o his_o own_o clothes_n and_o put_v on_o the_o slight_a garment_n use_v there_o by_o the_o digger_n he_o further_o inform_v his_o reader_n that_o when_o they_o have_v descend_v about_o 80_o fathom_n beneath_o the_o surface_n of_o the_o earth_n he_o begin_v to_o feel_v a_o breath_n of_o a_o almost_o lukewarm_a air_n which_o warmth_n increase_v upon_o he_o as_o he_o descend_v low_a please_v he_o not_o a_o little_a because_o it_o free_v he_o from_o the_o troublesome_a scent_n of_o his_o former_a coldness_n add_v that_o the_o overseer_n of_o the_o mine_n who_o conduct_v he_o affirm_v to_o he_o as_o also_o the_o officer_n of_o other_o hungarian_a mine_n unanimous_o do_v that_o in_o all_o their_o mine_n at_o least_o all_o the_o deep_a one_o after_o a_o thick_a tract_n of_o cold_a earth_n there_o succeed_v a_o low_a region_n that_o be_v always_o hot_a and_o that_o after_o they_o arrive_v at_o such_o a_o depth_n they_o feel_v not_o any_o more_o cold_a but_o always_o heat_n how_o deep_a soever_o they_o dig_v and_o to_o add_v upon_o the_o by_o though_o this_o learned_a man_n lie_v much_o weight_n upon_o antiperistasis_n yet_o in_o the_o next_o page_n to_o those_o that_o contain_v what_o i_o have_v be_v just_a now_o relate_v he_o either_o very_o candid_o or_o inconsiderate_o take_v notice_n that_o they_o inform_v he_o that_o their_o mine_n whether_o more_a or_o less_o deep_a they_o observe_v that_o at_o some_o time_n in_o the_o year_n a_o somewhat_o intenser_n heat_n be_v feel_v and_o the_o two_o time_n that_o he_o express_o name_n be_v those_o opposite_o qualify_v season_n of_o summer_n and_o winter_n have_v lay_v down_o these_o general_a narrative_n i_o now_o proceed_v to_o consider_v the_o earth_n region_n in_o particular_a about_o which_o the_o sum_n of_o what_o i_o yet_o have_v to_o propound_v may_v be_v convenient_o enough_o comprise_v in_o the_o 4_o follow_a proposition_n chap._n iii_o proposition_n the_o 1._o the_o first_o region_n of_o the_o earth_n be_v very_o variable_a both_o as_o to_o bound_n and_o as_o to_o temperature_n the_o former_a part_n of_o this_o observation_n will_v not_o be_v difficult_a to_o prove_v since_o it_o will_v be_v easy_o grant_v that_o the_o manifest_a operation_n of_o the_o sunbeam_n be_v caeteris_fw-la paribus_fw-la great_a and_o reach_v further_a in_o hot_a climate_n then_o in_o cold_a one_o in_o the_o midst_n of_o summer_n then_o in_o the_o depth_n of_o winter_n the_o second_o part_n of_o the_o observation_n may_v be_v prove_v by_o the_o same_o argument_n as_o the_o first_o to_o which_o may_v be_v add_v as_o to_o some_o place_n the_o solidity_n or_o porousness_n of_o the_o earth_n as_o also_o the_o nature_n of_o some_o salt_n marchasite_n and_o other_o body_n contain_v in_o it_o which_o by_o their_o natural_a temperature_n may_v dispose_v the_o soil_n to_o coldness_n or_o heat_n as_o i_o shall_v have_v occasion_n to_o show_v when_o i_o come_v to_o speak_v of_o the_o second_o region_n in_o the_o mean_a time_n i_o have_v this_o to_o observe_v further_o that_o in_o this_o first_o region_n the_o air_n be_v usual_o more_o temperate_a as_o to_o cold_a and_o heat_n then_o that_o above_o the_o surface_n of_o the_o earth_n and_o that_o this_o region_n be_v not_o wont_a to_o be_v considerable_o deep_a both_o part_n of_o which_o observation_n be_v capable_a of_o be_v make_v good_a by_o the_o same_o reason_n and_o therefore_o i_o shall_v endeavour_v to_o prove_v they_o joint_o that_o in_o the_o uppermost_a region_n of_o the_o earth_n it_o shall_v be_v less_o cold_a than_o above_o the_o surface_n seem_v reasonable_a to_o be_v allow_v upon_o this_o consideration_n that_o the_o subterraneal_a cavity_n of_o the_o earth_n be_v shelter_v by_o the_o thickness_n of_o the_o side_n from_o the_o direct_a action_n of_o the_o sunbeam_n the_o wind_n etc._n etc._n and_o be_v also_o keep_v from_o a_o immediate_a or_o at_o least_o from_o so_o full_a a_o contact_n of_o the_o external_a air_n when_o that_o be_v vehement_o either_o heat_v or_o refrigerated_a and_o first_o as_o to_o the_o heat_n of_o the_o sun_n that_o that_o do_v much_o less_o powerful_o affect_v such_o place_n as_o be_v shelter_v from_o its_o action_n by_o solid_a body_n may_v appear_v by_o the_o conservatory_n of_o ice_n and_o snow_n wherein_o freeze_a water_n be_v keep_v in_o that_o state_n during_o all_o the_o heat_n of_o summer_n and_o that_o oftentimes_o in_o cavity_n that_o be_v at_o no_o considerable_a depth_n beneath_o the_o superficies_n of_o the_o earth_n nay_o i_o remember_v that_o have_v have_v occasion_n for_o the_o perfect_a of_o some_o conclusion_n i_o be_v try_v to_o keep_v ice_n many_o week_n after_o the_o frosty_a wether_n be_v go_v and_o a_o mild_a season_n be_v come_v in_o i_o be_v able_a to_o do_v it_o contrary_a to_o the_o expectation_n of_o some_o curious_a man_n without_o either_o dig_v to_o a_o notable_a depth_n in_o the_o ground_n or_o build_v any_o substantial_a structure_n over_o the_o cavity_n for_o want_v conveniency_n i_o content_v myself_o though_o it_o be_v in_o a_o champain_n place_n with_o a_o pit_n somewhat_o broad_a at_o the_o bottom_n of_o about_o four_o foot_n deep_a or_o less_o who_o mouth_n be_v shelter_v only_o by_o a_o little_a low_a thatch_a hovel_n that_o be_v wide_o open_a to_o the_o north_n and_o only_o screen_v the_o mouth_n or_o vent_v of_o the_o little_a pit_n from_o the_o direct_a beam_n of_o the_o sun_n and_o though_o i_o will_v not_o deny_v that_o in_o deep_a conservatory_n of_o snow_n the_o natural_a coldness_n of_o the_o earth_n especial_o in_o some_o place_n may_v contribute_v to_o the_o effect_n yet_o i_o remember_v that_o discourse_v once_o with_o a_o traveller_n and_o scholar_n that_o be_v bear_v in_o hot_a country_n of_o a_o conjecture_n of_o i_o that_o in_o a_o arch_a building_n who_o wall_n be_v sufficient_o thick_a and_o who_o air_n be_v careful_o keep_v from_o all_o avoidable_a intercourse_n with_o the_o external_a air_n one_o may_v without_o dig_v so_o much_o as_o a_o man_n depth_n into_o the_o ground_n make_v a_o sufficient_a conservatory_n for_o ice_n in_o very_o open_a and_o unshelter_v place_n and_o even_o such_o as_o salisbury_z plain_a itself_o discourse_v as_o i_o begin_v to_o say_v with_o this_o traveller_n about_o this_o conjecture_n he_o tell_v i_o that_o at_o a_o place_n he_o name_v to_o i_o in_o the_o southern_a part_n of_o france_n who_o heat_n seem_v to_o i_o to_o exceed_v that_o of_o divers_a part_n of_o italy_n some_o curious_a person_n that_o be_v resolve_v at_o any_o rate_n to_o have_v ice_n in_o summer_n though_o the_o soil_n be_v such_o that_o they_o can_v not_o dig_v 4_o foot_n without_o meeting_n with_o water_n be_v yet_o able_a to_o make_v use_n of_o conservatory_n by_o cover_v the_o brick-building_n they_o make_v over_o their_o pit_n with_o clay_n and_o sand_n to_o a_o very_a considerable_a thickness_n and_o take_v care_n that_o the_o only_a place_n that_o shall_v permit_v access_n to_o the_o outward_a air_n shall_v be_v a_o small_a northern_a door_n to_o go_v in_o and_o out_o at_o fit_v to_o shut_v exact_o close_a and_o fence_v with_o a_o little_a porch_n furnish_v with_o another_o door_n and_o by_o this_o mean_v he_o affirm_v these_o gentleman_n to_o reserve_v the_o include_v ice_n not_o only_o all_o the_o summer_n long_o but_o sometime_o for_o two_o or_o three_o year_n together_o the_o heat_n of_o that_o region_n make_v many_o of_o their_o winter_n too_o mild_a to_o recruit_v they_o with_o ice_n to_o all_o these_o thing_n i_o shall_v add_v that_o even_o where_o the_o intercourse_n be_v not_o quite_o debar_v but_o leave_v free_a enough_o betwixt_o the_o subterraneal_a and_o the_o superior_a air_n the_o operation_n of_o the_o sunbeam_n may_v be_v very_o much_o less_o in_o a_o cavity_n though_o but_o shallow_a beneath_o the_o surface_n of_o the_o ground_n then_o above_o it_o for_o beside_o that_o trial_n have_v inform_v i_o that_o liquor_n that_o differ_v in_o little_a else_o then_o in_o consistence_n will_v not_o so_o easy_o pervade_v each_o other_o as_o a_o man_n will_v surmise_v unless_o some_o external_a motion_n hasten_v their_o intimate_a mingle_n with_o one_o another_o i_o remember_v that_o one_o morning_n pretty_a late_a have_v have_v the_o curiosity_n to_o descend_v into_o a_o pit_n where_o they_o be_v dig_v out_o iron_n oar_n though_o this_o cavity_n have_v not_o very_o narrow_a orifice_n and_o be_v dug_n direct_o downward_o and_o exceed_v not_o ten_o or_o twelve_o foot_n in_o depth_n yet_o i_o find_v not_o the_o heat_n at_o all_o troublesome_a whilst_o i_o stay_v there_o though_o the_o pit_n be_v in_o a_o open_a field_n unshade_v by_o tree_n and_o though_o
the_o earth_n be_v natural_o a_o body_n consist_v of_o gross_a and_o heavy_a part_n that_o be_v usual_o much_o less_o agitate_a than_o those_o of_o our_o organ_n of_o feel_v it_o shall_v as_o to_o sense_n be_v cold_a and_o that_o therefore_o that_o quality_n may_v be_v just_o ascribe_v to_o it_o in_o that_o region_n where_o by_o virtue_n of_o its_o situation_n it_o be_v keep_v from_o be_v considerable_o affect_v either_o by_o the_o heat_n of_o the_o superior_a air_n or_o by_o that_o of_o the_o deep_a part_n of_o the_o earth_n which_o upper_a and_o low_a heat_n be_v the_o two_o agent_n that_o seem_v of_o all_o other_o the_o most_o likely_a to_o put_v its_o part_n into_o a_o unusual_a motion_n and_o thereby_o change_v its_o natural_a temper_n that_o our_o proposition_n be_v also_o confirmable_a by_o experience_n may_v be_v gather_v from_o the_o relation_n set_v down_o in_o the_o former_a part_n of_o this_o discourse_n and_o here_o it_o will_v be_v proper_a to_o take_v notice_n of_o the_o advertisement_n intimate_v in_o the_o close_a of_o our_o above_o deliver_v proposition_n that_o this_o coldness_n ascribe_v to_o the_o second_o region_n of_o the_o earth_n be_v to_o be_v understand_v comparative_o to_o the_o other_o two_o for_o otherwise_o that_o even_o this_o earth_n be_v not_o as_o many_o naturallist_n will_v have_v it_o the_o summum_fw-la frigidum_fw-la i_o gather_v from_o this_o that_o i_o can_v never_o hear_v of_o any_o ice_n meet_v with_o there_o at_o any_o time_n of_o the_o year_n though_o snow_n or_o hail_n may_v be_v produce_v in_o the_o middle_a region_n at_o differ_v and_o sometime_o quite_o opposite_a season_n of_o the_o year_n nay_o i_o have_v not_o find_v by_o the_o answer_n that_o be_v make_v i_o by_o those_o that_o have_v descend_v far_o enough_o into_o this_o region_n that_o they_o find_v the_o cold_a any_o where_o very_o great_a or_o that_o in_o some_o place_n they_o have_v find_v it_o at_o all_o considerable_a as_o we_o shall_v see_v in_o the_o explication_n of_o the_o next_o proposition_n i_o know_v not_o whether_o it_o will_v much_o strengthen_v what_o have_v be_v say_v if_o i_o add_v that_o i_o learn_v by_o inquiry_n of_o such_o person_n as_o i_o late_o mention_v that_o at_o the_o mouth_n of_o deep_a grooves_n in_o mine_n the_o steam_n that_o ascend_v do_v often_o feel_v warm_a though_o the_o outward_a air_n where_o the_o observation_n be_v make_v be_v affect_v with_o the_o heat_n of_o summer_n but_o though_o this_o probable_o argue_v that_o if_o the_o middle_a region_n of_o the_o earth_n through_o which_o these_o steam_n must_v ascend_v be_v very_o intense_o cold_a they_o will_v be_v so_o refrigerated_a in_o their_o passage_n as_o to_o feel_v rather_o cold_a than_o hot_a at_o their_o appear_v above_o ground_n especial_o in_o summer_n yet_o i_o shall_v not_o lay_v much_o weight_n for_o some_o may_v perhaps_o be_v allow_v it_o upon_o this_o argument_n because_o i_o have_v not_o yet_o try_v how_o far_o a_o warm_a steam_n may_v be_v alter_v in_o its_o passage_n through_o a_o cold_a conduit_n not_o to_o mention_v that_o in_o the_o earth_n the_o passage_n by_o be_v direct_o upward_o may_v be_v much_o the_o nimbly_o traverse_v chap._n 6._o the_o second_o proposition_n relate_v to_o the_o temperature_n of_o the_o second_o region_n of_o the_o earth_n may_v be_v deliver_v in_o these_o term_n proposition_n the_o 3_o in_o several_a place_n which_o by_o reason_n of_o their_o distance_n from_o the_o surface_n of_o the_o earth_n one_o will_v refer_v to_o the_o middle_a region_n of_o it_o the_o temperature_n of_o the_o air_n be_v very_o differ_v at_o the_o same_o time_n of_o the_o year_n i_o choose_v to_o express_v myself_o thus_o to_o prevent_v some_o ambiguity_n and_o objection_n which_o i_o foresee_v that_o short_a but_o less_o dear_a and_o full_a expression_n may_v give_v occasion_n to_o in_o the_o proof_n of_o our_o proposition_n both_o experience_n and_o reason_n may_v distinct_o be_v employ_v and_o to_o begin_v with_o experience_n whereas_o in_o the_o above_o recite_v descent_n into_o the_o hungarian-mine_n there_o be_v observe_v a_o notable_o cold_a region_n of_o a_o considerable_a thickness_n i_o have_v purposely_o procure_v account_n from_o divers_a person_n that_o have_v here_o in_o england_n have_v occasion_n some_o of_o they_o frequent_o to_o descend_v into_o deep_a pit_n or_o grooves_n of_o differ_v mineral_n without_o find_v by_o the_o narratives_n they_o make_v i_o that_o they_o take_v notice_n of_o any_o notable_o cold_a part_n that_o they_o pass_v through_o unless_o i_o particular_o ask_v a_o question_n about_o such_o a_o thing_n but_o for_o aught_o i_o can_v gather_v from_o their_o spontaneous_a relation_n they_o feel_v in_o summertime_n a_o remission_n of_o the_o heat_n of_o the_o external_a air_n assoon_o as_o ever_o they_o begin_v to_o descend_v which_o warmth_n do_v not_o so_o far_o decrease_v as_o to_o terminate_v in_o any_o notable_a coldness_n before_o they_o come_v into_o a_o deep_a part_n of_o the_o earth_n where_o they_o be_v never_o trouble_v with_o that_o quality_n and_o some_o of_o these_o relation_n i_o have_v from_o profess_a miner_n and_o be_v curious_a that_o the_o relation_n i_o procure_v shall_v be_v of_o subterraneal_a part_n seat_v in_o very_o differ_v part_n of_o england_n as_o well_o as_o of_o place_n not_o all_o or_o most_o of_o they_o have_v vein_n of_o one_o and_o the_o same_o mineral_n and_o i_o learn_v by_o particlar_a inquiry_n from_o a_o practical_a mathematician_n that_o be_v often_o employ_v about_o lead-mine_n that_o at_o such_o depth_n as_o according_a to_o morinus_n the_o second_o region_n of_o the_o earth_n reach_v to_o he_o himself_o observe_v it_o to_o be_v sensible_o warm_a at_o all_o season_n of_o the_o year_n for_o about_o that_o circumstance_n i_o be_v peculiar_o solicitous_a to_o be_v satisfy_v nor_o be_v it_o unconsonant_a to_o reason_n that_o the_o middle_a region_n of_o the_o earth_n in_o the_o sense_n mean_v in_o the_o proposition_n shall_v not_o be_v of_o the_o same_o temperature_n in_o all_o place_n not_o only_o because_o of_o the_o difference_n which_o the_o climate_n may_v produce_v by_o reason_n of_o its_o be_v very_o much_o hot_a or_o very_o much_o cold_a in_o one_o place_n then_o in_o another_o but_o from_o the_o peculiar_a constitution_n of_o the_o soil_n to_o the_o consideration_n whereof_o i_o shall_v here_o confine_v myself_o now_o this_o temperament_n of_o the_o soil_n itself_o may_v be_v divertify_v not_o only_o by_o its_o great_a or_o lesser_a compactnesse_n upon_o which_o account_n some_o soil_n be_v rocky_a or_o stony_a and_o other_o light_n and_o spungy_a but_o from_o the_o nature_n of_o the_o spring_n or_o subterraneous_a liquor_n that_o may_v abound_v in_o it_o or_o strain_n through_o it_o into_o the_o groove_n or_o pit_n we_o suppose_v the_o observer_n to_o be_v in_o and_o that_o especial_o by_o the_o mineral_n particular_o salt_n and_o marchasite_n that_o grow_v near_o the_o side_n of_o the_o well_o or_o be_v bring_v thither_o by_o the_o water_n to_o illustrate_v this_o give_v i_o leave_v to_o consider_v that_o nature_n do_v not_o regulate_v herself_o under_o ground_n by_o our_o imaginary_a division_n but_o without_o take_v notice_n of_o they_o produces_z marchasite_n salt_n and_o other_o mineral_n most_o frequent_o perhaps_o in_o what_o we_o call_v the_o low_a region_n of_o the_o earth_n but_o yet_o sometime_o to_o in_o our_o upper_a region_n and_o oftentimes_o in_o our_o middlemost_a region_n let_v we_o then_o suppose_v that_o in_o some_o place_n of_o this_o last_o name_v region_n there_o be_v a_o mine_n of_o that_o earth_n that_o natural_o abound_v with_o embryonated_a nitre_n or_o with_o some_o other_o salt_n that_o be_v apt_a especial_o be_v dissolve_v or_o moisten_v with_o water_n a_o thing_n very_o familiar_o to_o be_v meet_v within_o in_o mine_n to_o send_v out_o a_o refrigerate_v effluvium_fw-la or_o by_o its_o contact_n to_o cool_v the_o air._n let_v we_o also_o suppose_v that_o by_o the_o side_n of_o another_o well_o of_o the_o same_o depth_n there_o be_v store_n of_o unripe_a mineral_n that_o be_v in_o the_o process_n of_o generation_n or_o rather_o a_o great_a quantity_n of_o marchasiticall_a earth_n if_o i_o may_v so_o call_v it_o that_o be_v such_o a_o substance_n as_o i_o have_v meet_v with_o in_o more_o than_o one_o place_n copious_o impregnate_v and_o as_o it_o be_v blend_v with_o mineral_n of_o a_o marchasiticall_a nature_n and_o yet_o of_o so_o open_a and_o loose_v a_o texture_n as_o not_o only_a water_n will_v in_o a_o few_o hour_n but_o air_n also_o will_v in_o not_o very_o many_o evident_o work_v upon_o it_o and_o since_o during_o the_o time_n that_o marchasite_n be_v slow_o dissolve_v it_o have_v be_v observe_v according_a to_o what_o we_o have_v elsewhere_o deliver_v heat_n deliver_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