20000 лье под водой

Chapter 14. The Black Current

           "Bekindenoughtolisten,andyouwillthenseewhetheryouhaveanycausetoaccusemeoffollyandcontradiction."

           "Ilisten."

           "YouknowaswellasIdo,Professor,thatmancanliveunderwater,providinghecarrieswithhimasufficientsupplyofbreathableair.Insubmarineworks,theworkman,cladinanimperviousdress,withhisheadinametalhelmet,receivesairfromabovebymeansofforcingpumpsandregulators."

           "Thatisadivingapparatus,"saidI.

           "Justso,butundertheseconditionsthemanisnotatliberty;heisattachedtothepumpwhichsendshimairthroughanindia-rubbertube,andifwewereobligedtobethusheldtotheNautilus,wecouldnotgofar."

           "Andthemeansofgettingfree?"Iasked.

           "ItistousetheRouquayrolapparatus,inventedbytwoofyourowncountrymen,whichIhavebroughttoperfectionformyownuse,andwhichwillallowyoutoriskyourselfunderthesenewphysiologicalconditionswithoutanyorganwhateversuffering.Itconsistsofareservoirofthickironplates,inwhichIstoretheairunderapressureoffiftyatmospheres.Thisreservoirisfixedonthebackbymeansofbraces,likeasoldier’sknapsack.Itsupperpartformsaboxinwhichtheairiskeptbymeansofabellows,andthereforecannotescapeunlessatitsnormaltension.IntheRouquayrolapparatussuchasweuse,twoindiarubberpipesleavethisboxandjoinasortoftentwhichholdsthenoseandmouth;oneistointroducefreshair,theothertoletoutthefoul,andthetongueclosesoneortheotheraccordingtothewantsoftherespirator.

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