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 some_o place_n to_o be_v derivable_a from_o the_o two_o above_o mention_v cause_n which_o must_v to_o produce_v so_o considerable_a a_o effect_n be_v assist_v by_o a_o three_o cause_n more_o potent_a than_o themselves_o which_o seem_v to_o be_v the_o incalescence_n there_o be_v produce_v in_o many_o mine_n and_o other_o place_n by_o the_o mutual_a action_n of_o the_o component_a part_n promote_v by_o water_n of_o immature_n and_o more_o loose_o context_v mineral_n especial_o such_o as_o be_v of_o a_o marchasiticall_a nature_n that_o such_o a_o incalescence_n may_v by_o such_o a_o way_n be_v produce_v in_o the_o bowel_n of_o the_o earth_n i_o have_v elsewhere_o show_v in_o my_o discourse_n of_o subterraneal_a fire_n &_o heat_n by_o the_o example_n of_o such_o incalescence_n producible_a in_o mineral_n body_n here_o above_o ground_n that_o marchasite_n which_o for_o the_o most_o part_n abound_v in_o vitriol_n be_v body_n very_o fit_a to_o procure_v this_o subterraneal_a heat_n may_v be_v 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 air_n abroad_o be_v much_o heat_v at_o that_o time_n of_o the_o year_n which_o be_v in_o that_o season_n or_o at_o least_o very_a near_o it_o that_o be_v wont_a to_o be_v call_v the_o dogg-day_n chap._n four_o and_o as_o we_o have_v show_v that_o the_o subterraneal_a air_n even_o in_o the_o first_o region_n be_v usual_o much_o less_o heat_v than_o the_o superterrestriall_a air_n so_o we_o may_v also_o easy_o observe_v that_o that_o inferior_a air_n be_v caeteris_fw-la paribus_fw-la wont_a to_o be_v much_o less_o refrigerated_a by_o the_o grand_a efficient_n of_o intense_a cold_a than_o the_o superior_a air._n i_o will_v not_o urge_v on_o this_o occasion_n what_o i_o have_v observe_v by_o a_o sure_a way_n then_o for_o aught_o i_o know_v have_v be_v before_o practise_v about_o the_o smoke_n of_o some_o spring_n in_o frosty_a wether_n because_o i_o do_v not_o know_v but_o that_o those_o spring_n may_v have_v come_v from_o or_o pass_v a_o good_a way_n through_o some_o place_n very_o deep_a beneath_o the_o surface_n of_o the_o direct_o incumbent_a ground_n and_o perhaps_o from_o a_o soil_n peculiar_o fit_v to_o warm_v they_o whence_o the_o water_n may_v have_v derive_v a_o warmth_n considerable_a enough_o not_o to_o be_v quite_o lose_v till_o it_o begin_v to_o spring_v out_o of_o the_o ground_n where_o it_o need_v only_a not_o to_o be_v quite_o cold_a to_o appear_v to_o smoke_n the_o intense_a coldness_n of_o the_o air_n make_v those_o exhalation_n visible_a in_o frosty_a wether_n which_o will_v not_o be_v so_o in_o mild_a as_o be_v evident_a in_o a_o man_n breath_n which_o appear_v like_o a_o smoke_n in_o such_o weather_n though_o it_o be_v not_o visible_a in_o summer_n that_o therefore_o which_o i_o shall_v propose_v in_o favour_n of_o our_o observation_n be_v first_o take_v from_o the_o nature_n of_o the_o thing_n which_o may_v persuade_v we_o that_o the_o subterraneal_a air_n be_v though_o comparative_o cool_v yet_o indeed_o moderate_o warm_a in_o summer_n ought_v not_o to_o be_v affect_v with_o winter_n cold_a so_o much_o as_o that_o contiguous_a to_o the_o surface_n of_o the_o earth_n from_o who_o immediate_a contact_n it_o be_v by_o a_o thick_a arch_n of_o earth_n if_o i_o may_v so_o call_v it_o defend_v and_o that_o the_o cold_a reign_v most_o in_o the_o free_a air_n and_o the_o superficial_a part_n of_o the_o terrestrial_a globe_n may_v appear_v by_o water_n beginning_n to_o freeze_v at_o the_o top_n not_o at_o the_o bottom_n to_o which_o reason_n from_o the_o nature_n of_o the_o thing_n i_o shall_v add_v only_o this_o from_o experience_n that_o we_o see_v that_o in_o cellar_n that_o be_v arch_v and_o careful_o keep_v close_o from_o the_o communication_n of_o the_o outward_a air_n beer_n and_o other_o liquor_n may_v be_v keep_v from_o freeze_a in_o frosty_a and_o snowy_a wether_n as_o i_o have_v observe_v in_o a_o cellar_n that_o be_v but_o shallow_a but_o well_o arch_v in_o a_o winter_n that_o be_v sharp_a to_o a_o wonder_n and_o freeze_v strong_a liquor_n than_o beer_n in_o another_o cellar_n very_o near_o it_o that_o differ_v not_o much_o from_o it_o in_o depth_n but_o have_v not_o so_o thick_a and_o solid_a a_o roof_n and_o that_o not_o only_o here_o in_o england_n where_o the_o cold_a be_v less_o violent_a but_o even_o in_o russia_n itself_o where_o it_o be_v wont_a to_o be_v so_o extreme_a it_o reach_v not_o near_o so_o deep_a as_o one_o will_v think_v i_o learn_v by_o inquiry_n purposely_o make_v of_o a_o ingenious_a physician_n that_o live_v at_o moscow_n who_o answer_v i_o that_o other_o and_o he_o himself_o do_v in_o that_o city_n keep_v all_o the_o winter_n long_o not_o only_o their_o wine_n but_o their_o beer_n from_o freeze_a in_o cellar_n that_o be_v not_o above_o 12_o or_o 14_o foot_n deep_a but_o well_o cover_v above_o and_o careful_o line_v with_o plank_n of_o fir_n without_o any_o entrance_n but_o a_o small_a trap-door_n common_o at_o the_o top_n which_o be_v fit_v so_o exact_o to_o the_o orifice_n it_o be_v to_o close_v as_o to_o exclude_v as_o much_o as_o be_v possible_a all_o communication_n between_o the_o internal_a and_o external_a air_n that_o the_o latter_a may_v not_o affect_v the_o former_a with_o its_o coldness_n i_o have_v indeed_o suspect_v that_o in_o some_o cellar_n the_o comparative_a warmth_n we_o find_v there_o may_v be_v partly_o due_a to_o subterraneal_a exhalation_n that_o be_v pen_v up_o in_o they_o and_o perhaps_o too_o in_o some_o measure_n from_o the_o steam_n of_o the_o ferment_a or_o ferment_v liquor_n lodge_v in_o those_o place_n and_o i_o be_v somewhat_o confirm_v in_o this_o suspicion_n by_o a_o information_n my_o inquiry_n obtain_v from_o the_o new_o mention_v doctor_n who_o tell_v i_o upon_o his_o own_o observation_n that_o in_o one_o of_o the_o cellar_n he_o make_v use_v of_o at_o moscow_n have_v occasion_n to_o open_v the_o above_o mention_v trap-door_n after_o the_o cellar_n have_v for_o a_o good_a while_n be_v keep_v very_o close_o shut_v there_o come_v out_o at_o the_o vent_n that_o be_v thereby_o give_v a_o copious_a steam_n in_o the_o form_n of_o smoke_n which_o to_o they_o who_o have_v their_o body_n affect_v with_o the_o external_a air_n be_v very_o sensible_o warm_a and_o be_v almost_o unfit_a for_o respiration_n which_o circumstance_n increase_v my_o suspicion_n that_o there_o may_v be_v among_o these_o steame_n some_o of_o the_o nature_n of_o those_o that_o have_v be_v observe_v to_o come_v from_o ferment_a liquor_n especial_o wine_n and_o so_o abound_v in_o some_o cellar_n as_o almost_o to_o stifle_v those_o that_o venture_v into_o those_o vault_n and_o to_o kill_v some_o of_o they_o outright_o which_o effect_n the_o long_a abode_n of_o subterraneal_a steam_n in_o stagnate_v air_n even_o in_o many_o place_n where_o no_o metalline_a oar_n at_o all_o not_o other_o noxious_a mineral_n have_v be_v find_v have_v enable_v that_o air_n to_o produce_v of_o which_o divers_a sad_a instance_n have_v be_v give_v within_o less_o than_o a_o mile_n of_o this_o place_n upon_o man_n first_o go_v down_o into_o pit_n or_o well_n that_o have_v not_o in_o a_o long_a time_n be_v open_v or_o make_v use_n of_o but_o this_o be_v here_o mention_v only_o upon_o the_o by_o nor_o have_v we_o any_o necessity_n to_o fly_v to_o subterraneal_a exhalation_n for_o the_o comparative_a warmth_n that_o good_a cellar_n in_o general_n afford_v in_o frosty_a weather_n since_o that_o phaenomenon_n may_v be_v account_v for_o by_o the_o reason_n former_o give_v that_o the_o closeness_n of_o the_o cavity_n and_o the_o thickness_n of_o the_o side_n and_o roof_n keep_v it_o from_o be_v vehement_o affect_v with_o the_o cold_a of_o the_o ambient_fw-la air._n i_o know_v it_o be_v pretend_v that_o the_o warmth_n we_o speak_v of_o proceed_v from_o a_o antiperistasis_n but_o not_o now_o to_o engage_v in_o a_o controversy_n that_o will_v take_v up_o too_o much_o time_n it_o may_v here_o suffice_v to_o represent_v that_o in_o our_o case_n there_o appear_v no_o necessity_n of_o recur_v to_o it_o the_o phaenomenon_n be_v solvable_a by_o the_o region_n new_o cite_v which_o may_v be_v confirm_v by_o this_o experiment_n that_o in_o the_o vault_a cellar_n above_o mention_v wherein_o beer_n be_v keep_v from_o freeze_a in_o a_o almost_o prodigious_o sharp_a winter_n the_o include_v air_n though_o sensible_o warm_a to_o those_o that_o come_v out_o of_o the_o free_a air_n have_v not_o so_o intend_v its_o native_a heat_n as_o the_o assertor_n of_o antiperistasis_n will_v have_v expect_v be_v cold_o than_o the_o free_a air_n common_o be_v in_o that_o place_n not_o only_o in_o the_o heat_n of_o summer_n but_o in_o other_o season_n when_o the_o weather_n be_v temperate_a as_o i_o be_v assure_v by_o compare_v my_o own_o observation_n make_v at_o other_o time_n with_o the_o account_n bring_v i_o by_o a_o skilful_a person_n who_o i_o employ_v into_o that_o cellar_n at_o late_a hour_n in_o one_o or_o two_o of_o the_o sharp_a night_n of_o the_o forementioned_a cruel_a winter_n with_o the_o same_o excellent_a seal_a weatherglass_n that_o i_o have_v long_o keep_v suspend_v within_o a_o stone_n cast_v of_o that_o place_n chap._n v._n have_v say_v thus_o much_o about_o the_o earth_n uppermost_a region_n i_o now_o proceed_v to_o that_o which_o lie_v next_o beneath_o it_o who_o temperature_n i_o can_v so_o convenient_o give_v a_o account_n of_o in_o less_o than_o two_o proposition_n whereof_o the_o first_o be_v this_o proposition_n the_o first_o the_o second_o region_n of_o the_o earth_n seem_v to_o be_v for_o the_o most_o part_n cold_a in_o comparison_n of_o the_o other_o two_o this_o proposition_n may_v be_v confirm_v partly_o by_o reason_n and_o partly_o by_o experience_n and_o first_o it_o seem_v consonant_a to_o reason_n that_o since_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
effect_n the_o relation_n here_o mean_v be_v afford_v we_o by_o the_o follow_a passage_n take_v out_o of_o the_o voyage_n of_o mounseur_fw-fr de_fw-fr mont_n into_o new-france_n whereof_o he_o go_v to_o be_v governor_n where_o the_o relator_n thus_o recite_v his_o observation_n about_o the_o eighteen_o day_n of_o june_n we_o find_v the_o sea-water_n during_o three_o day_n space_n very_o warm_a and_o by_o the_o same_o warmth_n our_o wine_n also_o be_v warm_a in_o the_o bottom_n of_o our_o ship_n yet_o the_o air_n be_v no_o hot_a than_o before_o and_o the_o 21_o of_o the_o say_a month_n quite_o contrary_a we_o be_v 2_o or_o 3_o day_n so_o much_o compass_v with_o mist_n and_o cold_a that_o we_o think_v ourselves_o to_o be_v in_o the_o month_n of_o january_n and_o the_o water_n of_o the_o sea_n be_v extreme_a cold_a which_o continue_v with_o we_o until_o we_o come_v upon_o the_o bank_n by_o reason_n of_o the_o say_a mist_n which_o outward_o do_v procure_v this_o cold_a unto_o we_o this_o 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upon_o by_o the_o warmth_n which_o the_o air_n and_o upper_a part_n of_o the_o earth_n may_v from_o other_o cause_n receive_v shall_v be_v feel_v cold_a by_o those_o that_o descend_v into_o it_o unless_o in_o those_o few_o place_n where_o the_o coldness_n may_v be_v either_o expel_v or_o allay_v by_o hot_a spring_n or_o subterrestrial_a exhalation_n flow_v or_o ascend_v from_o the_o subjacent_a earth_n or_o the_o low_a part_n of_o the_o shore_n into_o the_o incumbent_n or_o adjacent_a part_n of_o the_o water_n to_o justify_v my_o ascribe_v of_o this_o coldness_n to_o the_o second_o or_o low_a region_n of_o the_o sea_n i_o shall_v now_o subjoin_v some_o relation_n i_o procure_v from_o person_n that_o have_v occasion_n to_o go_v down_o into_o it_o or_o otherways_o take_v notice_n of_o its_o temperature_n in_o very_a differ_a region_n of_o the_o world_n and_o at_o very_o unequal_a depth_n and_o first_o as_o to_o the_o temperature_n of_o the_o low_a region_n in_o the_o northern_a sea_n i_o have_v the_o opportunity_n to_o converse_v often_o and_o sometime_o to_o oblige_v a_o man_n bold_a and_o curious_a enough_o who_o for_o some_o year_n get_v the_o best_a part_n of_o his_o subsistence_n by_o descend_v to_o the_o bottom_n of_o the_o sea_n in_o a_o engine_n who_o structure_n i_o elsewhere_o describe_v to_o seek_v for_o and_o recover_v good_n lose_v in_o shipwrack_v vessel_n this_o person_n i_o diligent_o examine_v about_o divers_a submarine_n phaenomena_n about_o which_o his_o answer_n may_v be_v elsewhere_o meet_v with_o and_o as_o to_o the_o temperature_n of_o the_o low_a part_n of_o the_o sea_n the_o knowledge_n of_o which_o be_v that_o alone_a that_o concern_v we_o in_o this_o place_n he_o several_a time_n complain_v to_o i_o of_o the_o coldness_n of_o the_o deep_a water_n which_o keep_v he_o from_o be_v able_a to_o stay_v in_o it_o so_o long_o as_o he_o may_v have_v be_v put_v into_o a_o condition_n of_o do_v by_o the_o goodness_n of_o his_o engine_n for_o i_o remember_v that_o he_o relate_v to_o i_o that_o he_o stay_v once_o betwixt_o a_o hour_n or_o two_o at_o a_o depth_n that_o be_v no_o great_a than_o 14_o foot_n and_o a_o half_a upon_o the_o coast_n of_o sweden_n in_o a_o place_n that_o be_v near_o the_o shore_n and_o i_o afterward_o learn_v that_o he_o stay_v much_o long_o in_o a_o deep_a place_n use_n have_v probable_o make_v the_o cold_a more_o supportable_a to_o he_o he_o tell_v i_o then_o that_o about_o two_o year_n before_o he_o be_v engage_v by_o a_o good_a reward_n to_o go_v down_o with_o his_o engine_n to_o the_o bottom_n of_o the_o sea_n to_o fetch_v up_o some_o good_n of_o value_n out_o of_o a_o ship_n that_o have_v be_v cast_v away_o there_o within_o about_o a_o mile_n distance_n from_o a_o very_a little_a island_n and_o if_o i_o mistake_v not_o about_o 6_o mile_n from_o the_o shore_n he_o far_o answer_v i_o that_o though_o he_o feel_v it_o not_o at_o all_o cold_a on_o the_o surface_n of_o the_o water_n his_o attempt_n be_v make_v in_o june_n yet_o about_o the_o depth_n of_o the_o ship_n it_o be_v so_o very_o cold_a that_o he_o feel_v it_o not_o so_o cold_a in_o england_n winter_n and_o frosty_a weather_n and_o he_o tell_v i_o that_o a_o excessive_a cold_a be_v there_o feel_v not_o only_o by_o he_o but_o by_o very_o sturdy_a man_n who_o invite_v by_o his_o example_n will_v needs_o also_o go_v down_o themselves_o to_o participate_v and_o promote_v the_o hope_v for_o discovery_n he_o tell_v i_o also_o that_o the_o upper_a water_n do_v but_o cool_a and_o refresh_v he_o but_o the_o deep_a he_o go_v the_o cold_o he_o feel_v it_o which_o be_v the_o more_o considerable_a because_o he_o have_v some_o time_n occasion_n to_o stay_v at_o 10_o fathom_n or_o even_o 80_o foot_n under_o water_n and_o i_o since_o find_v that_o he_o inform_v divers_a virtuoso_n that_o purposely_o consult_v he_o that_o he_o find_v the_o coldness_n of_o the_o water_n increase_v with_o its_o depth_n and_o give_v that_o for_o the_o reason_n why_o he_o can_v not_o stay_v so_o many_o hour_n as_o otherwise_o he_o may_v at_o the_o bottom_n of_o the_o sea_n add_v that_o before_o his_o engine_n be_v well_o fit_v he_o be_v once_o so_o cover_v over_o with_o it_o that_o he_o be_v force_v to_o touch_v the_o ground_n with_o his_o hand_n and_o foot_n and_o the_o neighbour_a part_n to_o which_o he_o find_v a_o coldness_n communicate_v by_o the_o fundus_fw-la he_o lean_v upon_o though_o the_o closeness_n of_o his_o disorder_a engine_n make_v the_o other_o and_o whilst_o he_o be_v in_o that_o posture_n upper_a part_n of_o his_o body_n of_o a_o very_a differ_a temper_n a_o inquisitive_a person_n of_o my_o acquaintance_n that_o make_v a_o long_a stay_n in_o the_o northern_a america_n at_o about_o two_o or_o three_o and_o forty_o degree_n of_o latitude_n and_o divert_v himself_o often_o with_o swim_v under_o water_n answer_v i_o that_o though_o he_o scarce_o remember_v himself_o to_o have_v dive_v above_o two_o fathom_n beneath_o the_o surface_n of_o the_o sea_n yet_o even_o at_o that_o small_a depth_n he_o observe_v the_o water_n to_o increase_v in_o coldness_n the_o low_a he_o descend_v into_o it_o which_o argue_v that_o though_o the_o sunbeam_n do_v often_o penetrate_v plentiful_o enough_o to_o carry_v light_n to_o a_o great_a depth_n under_o water_n yet_o they_o do_v not_o always_o carry_v with_o they_o a_o sensible_a heat_n and_o that_o at_o least_o in_o some_o place_n the_o upper_a region_n of_o the_o sea_n reach_v but_o a_o little_a way_n the_o coldness_n of_o the_o climate_n in_o these_o western_a part_n of_o europe_n and_o the_o want_n of_o considerable_a inducement_n to_o invite_v man_n to_o dive_v often_o to_o any_o great_a depth_n into_o our_o sea_n have_v keep_v i_o from_o be_v able_a to_o procure_v many_o observation_n about_o the_o temperature_n of_o their_o low_a region_n but_o upon_o the_o hot_a coast_n of_o africa_n and_o the_o east-indies_n the_o frequent_a invitation_n man_n have_v to_o dive_v for_o coral_n pearl_n and_o other_o submarine_n production_n have_v make_v it_o possible_a for_o i_o to_o get_v more_o numerous_a observation_n some_o of_o which_o i_o shall_v now_o annex_v chap._n 4._o meet_v with_o a_o person_n of_o quality_n who_o have_v be_v present_a at_o the_o sish_n of_o coral_n upon_o the_o shore_n of_o africa_n and_o who_o be_v himself_o practise_v in_o dive_v i_o inquire_v of_o he_o whether_o he_o find_v the_o sea_n upon_o the_o african_a coast_n to_o be_v much_o cold_a at_o a_o good_a depth_n then_o near_o the_o surface_n whereto_o he_o answer_v i_o that_o though_o he_o have_v seldom_o dive_v above_o three_o or_o four_o fathom_n deep_a yet_o at_o that_o depth_n he_o find_v it_o so_o much_o