Таємничий острів

           ButCyrusHardingknewthatnitro-glycerinewouldexplodebyashock.Heresolvedtoemploythismeans,andtryanotherway,ifthisdidnotsucceed.

           Infact,theblowofahammeronafewdropsofnitro-glycerine,spreadoutonahardsurface,wasenoughtocreateanexplosion.Buttheoperatorcouldnotbetheretogivetheblow,withoutbecomingavictimtotheoperation.Harding,therefore,thoughtofsuspendingamassofiron,weighingseveralpounds,bymeansofafiber,toanuprightjustabovethemine.Anotherlongfiber,previouslyimpregnatedwithsulphur,wasattachedtothemiddleofthefirst,byoneend,whiletheotherlayonthegroundseveralfeetdistantfromthemine.Thesecondfiberbeingsetonfire,itwouldburntillitreachedthefirst.Thiscatchingfireinitsturn,wouldbreak,andthemassofironwouldfallonthenitro-glycerine.Thisapparatusbeingthenarranged,theengineer,afterhavingsenthiscompanionstoadistance,filledthehole,sothatthenitro-glycerinewasonalevelwiththeopening;thenhethrewafewdropsofitonthesurfaceoftherock,abovewhichthemassofironwasalreadysuspended.

           Thisdone,Hardinglittheendofthesulphuredfiber,andleavingtheplace,hereturnedwithhiscompanionstotheChimneys.

           Thefiberwasintendedtoburnfiveandtwentyminutes,and,infact,fiveandtwentyminutesafterwardsamosttremendousexplosionwasheard.Theislandappearedtotrembletoitsveryfoundation.Stoneswereprojectedintheairasifbytheeruptionofavolcano

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