Путешествие к центру земли

The Wonders of Terrestrial Depths

           "Becauseifwehadgonedeepintothecrustofearth,weshouldhaveencounteredgreaterheat."

           "Accordingtoyoursystem,"saidmyuncle."Butwhatdoesthethermometersay?"

           "Hardlyfifteendegrees(59°Fahr),ninedegreesonlysinceourdeparture."

           "Well,whatisyourconclusion?"

           "Thisismyconclusion.Accordingtoexactobservations,theincreaseoftemperatureintheinterioroftheglobeadvancesattherateofonedegree(145°Fahr.)foreveryhundredfeet.Butcertainlocalconditionsmaymodifythisrate.ThusatYakoutskinSiberiatheincreaseofadegreeisascertainedtobereachedevery36feet.Thisdifferencedependsupontheheat-conductingpoweroftherocks.Moreover,intheneighbourhoodofanextinctvolcano,throughgneiss,ithasbeenobservedthattheincreaseofadegreeisonlyattainedatevery125feet.Letusthereforeassumethislasthypothesisasthemostsuitabletooursituation,andcalculate."

           "Well,docalculate,myboy."

           "Nothingiseasier,"saidI,puttingdownfiguresinmynotebook."Ninetimesahundredandtwenty-fivefeetgivesadepthofelevenhundredandtwenty-fivefeet."

           "Veryaccurateindeed."

           "Well?"

           "Bymyobservationweareat10,000feetbelowthelevelofthesea."

           "Isthatpossible?"

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