Mineral Resources of the United States, Part 1

aluminum amalgamation amounted Arizona average value bauxite bullion California cent copper chalcopyrite Colorado compared concentrating plant containing County in 1914 Creek crude cyanide decrease deep mines deposits district in 1914 district.-The dredge drift feet flasks furnace galena geology gold and silver grade Grant County hematite Hill Idaho important included increase Lake lead and zinc lead concentrates lead-zinc lease lessees limonite lode long tons manganese miles mines produced Missouri Mountain Nevada operated osmiridium ounces of gold ounces of silver oxidized pig iron placer gold placer mines platinum pounds in 1913 pounds of copper pounds of lead production of gold prospecting pyrite quartz quicksilver recovered recovery region reported Rept rock shaft shipments short tons silver mills small quantity smelter smelting sold or treated sphalerite spiegeleisen steel sulphide Survey Bull tion tonnage total value tunnel U. S. Geol United Utah vein yield zinc carbonate zinc concentrates