Таинственный остров

           Beforeanythingelsecouldbedoneitwasnecessarytomaketheironore,ofwhichtheengineerhadobservedsometracesinthenorthwestpartoftheisland,fitforusebyconvertingiteitherintoironorintosteel.

           Metalsarenotgenerallyfoundinthegroundinapurestate.Forthemostparttheyarecombinedwithoxygenorsulphur.SuchwasthecasewiththetwospecimenswhichCyrusHardinghadbroughtback,oneofmagneticiron,notcarbonated,theotherapyrite,alsocalledsulphuretofiron.Itwas,thereforethefirst,theoxideofiron,whichtheymustreducewithcoal,thatistosay,getridoftheoxygen,toobtainitinapurestate.Thisreductionismadebysubjectingtheorewithcoaltoahightemperature,eitherbytherapidandeasyCatalanmethod,whichhastheadvantageoftransformingtheoreintoironinasingleoperation,orbytheblastfurnace,whichfirstsmeltstheore,thenchangesitintoiron,bycarryingawaythethreetofourpercent.ofcoal,whichiscombinedwithit.

           NowCyrusHardingwantediron,andhewishedtoobtainitassoonaspossible.Theorewhichhehadpickedupwasinitselfverypureandrich.Itwastheoxydulousiron,whichisfoundinconfusedmassesofadeepgraycolor;itgivesablackdust,crystallizedintheformoftheregularoctahedron.Nativelodestonesconsistofthisore,andironofthefirstqualityismadeinEuropefromthatwithwhichSwedenandNorwayaresoabundantlysupplied.Notfarfromthisveinwastheveinofcoalalreadymadeuseofbythesettlers.

Настройки
Фон страницы
Размер шрифта
Межстрочный интервал
Фразовые глаголы
Показать / Скрыть меню
Шрифт
Roboto Lora
Уведомления
Страница 161 из 764