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History of the Cannon

           "Onesimplequestion,"saidElphinstone:"isourguntoberifled?"

           "No,certainlynot,"repliedBarbicane;"werequireanenormousinitialvelocity;andyouarewellawarethatashotquitsarifledgunlessrapidlythanitdoesasmooth-bore."

           "True,"rejoinedthemajor.

           Thecommitteehereadjournedforafewminutestoteaandsandwiches.

           Onthediscussionbeingrenewed,"Gentlemen,"saidBarbicane,"wemustnowtakeintoconsiderationthemetaltobeemployed.Ourcannonmustbepossessedofgreattenacity,greathardness,beinfusiblebyheat,indissoluble,andinoxidablebythecorrosiveactionofacids."

           "Thereisnodoubtaboutthat,"repliedthemajor;"andasweshallhavetoemployanimmensequantityofmetal,weshallnotbeatalossforchoice."

           "Well,then,"saidMorgan,"Iproposethebestalloyhithertoknown,whichconsistsofonehundredpartsofcopper,twelveoftin,andsixofbrass."

           "Iadmit,"repliedthepresident,"thatthiscompositionhasyieldedexcellentresults,butinthepresentcaseitwouldbetooexpensive,andverydifficulttowork.Ithink,then,thatweoughttoadoptamaterialexcellentinitswayandoflowprice,suchascastiron.Whatisyouradvice,major?"

           "Iquiteagreewithyou,"repliedElphinstone.

           "Infact,"continuedBarbicane,"castironcoststentimeslessthanbronze;itiseasytocast,itrunsreadilyfromthemouldsofsand,itiseasyofmanipulation,itisatonceeconomicalofmoneyandoftime

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