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Chapter 4. Ned Land

           "Ihavenoidea,Mr.Aronnax."

           "About6,500;andasinrealitytheatmosphericpressureisabout15lb.tothesquareinch,your6,500squareinchesbearatthismomentapressureof97,500lb."

           "Withoutmyperceivingit?"

           "Withoutyourperceivingit.Andifyouarenotcrushedbysuchapressure,itisbecausetheairpenetratestheinteriorofyourbodywithequalpressure.Henceperfectequilibriumbetweentheinteriorandexteriorpressure,whichthusneutraliseeachother,andwhichallowsyoutobearitwithoutinconvenience.Butinthewateritisanotherthing."

           "Yes,Iunderstand,"repliedNed,becomingmoreattentive;"becausethewatersurroundsme,butdoesnotpenetrate."

           "Precisely,Ned:sothatat32feetbeneaththesurfaceoftheseayouwouldundergoapressureof97,500lb.;at320feet,tentimesthatpressure;at3,200feet,ahundredtimesthatpressure;lastly,at32,000feet,athousandtimesthatpressurewouldbe97,500,000lb.thatistosay,thatyouwouldbeflattenedasifyouhadbeendrawnfromtheplatesofahydraulicmachine!"

           "Thedevil!"exclaimedNed.

           "Verywell,myworthyharpooner,ifsomevertebrate,severalhundredyardslong,andlargeinproportion,canmaintainitselfinsuchdepthsofthosewhosesurfaceisrepresentedbymillionsofsquareinches,thatisbytensofmillionsofpounds,wemustestimatethepressuretheyundergo.

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