Таємничий острів

           NebandPencroftskinnedthem,andonlybroughtbacktoGraniteHousetheirfatandskin,thisskinbeingintendedforthemanufactureofboots.

           Theresultofthehuntwasthis:nearlythreehundredpoundsoffat,alltobeemployedinthefabricationofcandles.

           Theoperationwasextremelysimple,andifitdidnotyieldabsolutelyperfectresults,theywereatleastveryuseful.CyrusHardingwouldonlyhavehadathisdisposalsulphuricacid,butbyheatingthisacidwiththeneutralfattybodieshecouldseparatetheglycerine;thenfromthisnewcombination,heeasilyseparatedtheolein,themargarin,andthestearin,byemployingboilingwater.Buttosimplifytheoperation,hepreferredtosaponifythefatbymeansoflime.Bythisheobtainedacalcareoussoap,easytodecomposebysulphuricacid,whichprecipitatedthelimeintothestateofsulphate,andliberatedthefattyacids.

           Fromthesethreeacids-oleic,margaric,andstearic-thefirst,beingliquid,wasdrivenoutbyasufficientpressure.Astothetwoothers,theyformedtheverysubstanceofwhichthecandlesweretobemolded.

           Thisoperationdidnotlastmorethanfourandtwentyhours.Thewicks,afterseveraltrials,weremadeofvegetablefibers,anddippedintheliquefiedsubstance,theyformedregularsteariccandles,moldedbythehand,whichonlywantedwhitenessandpolish.

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