Mineral Resources of the States and Territories West of the Rocky Mountains ..., Том 6

30 feet Amador County amount antimony assay average base bullion bed-rock bottom California Cañon carried cent centner charge chloride cinnabar claim Clear Creek County coal company's containing copper cost County Creek cross-cut crushed cupellation Deer Lodge deposits depth developed district ditch drift east estimated Eureka expenses extracted feet deep feet long feet wide flasks flume furnace galena gold gravel ground Gulch Hill hydraulic Idria inches iron labor Lautenthal lead-matte ledge limestone litharge located lode matte metal miles mill miners Mining Company Mountain Nevada Nevada County obtained opened operations ore-body ounces oxides porphyry pounds profit prospecting quantity quartz quicksilver refining reverberatory reverberatory furnace rich River roasting rock San Francisco shaft shipped silver slag slate smelting smelting-works stamps steam sulphurets sunk supply surface tailings thick tons Total tunnel tuyeres Valley vein washing width yield zinc