OCR Text |
Show VALUE AND SUPPLY OF MINERAL PRODUCTS Tho value of tho mineral production produc-tion of tho United 'States now ox-coeds ox-coeds 12,500,000,000 a year according to tho United States Geological Sur-I voy. Though this valuo falls far be- low that of tho country's farm pro-, ducts tho magnitude nnd scopo of , our mlncrnl Industry may bo best mensurcd by compnrln'g our own mlncrnl mln-crnl production with that of other countries, no ono of which can com-i pcto with us In Ubundonco or variety of mineral resources. Tho United, States mines nearly 40 por cent otj tho world's output of conl nnd produced pro-duced C5 per cent of tho petroleum In 1913. Of tho more essential metals, met-als, 40 por cent of tho world's output of iron oro Is rnlsed from American mines and the smelters of tho United States furnish tho world with 55 per cent of Its copper and at least 30 per cent of Its lead and zlno. Theso oro tho raw materials on which has been founded a great metallurgical In; dustry, but on which can bo bull much more oxtcnslvo chemical and motal working Industries. |