Statistics of Mines and Mining in the States and Territories West of the Rocky Mountains, Volume 7U.S. Government Printing Office, 1875 - Mines and mineral resources |
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50 feet Alpine County amount assay auriferous average base bullion bed-rock Belcher bullion California Caņon cargas carried cent claim coal coke company's Consolidated contains copper cost of mining country-rock County Creek cross-cut Crown Point deposits depth developed distance district ditch dividends drift east Eureka expenses extracted feet deep feet long feet wide flume Fork furnace galena Georgetown gold Gold Hill granite Grass Valley gravel gray copper ground gulch Hill hoisting-works hydraulic inches incline iron lead ledge limestone located lode metals miles mill miners Mining Company Mount Gregory Mountain Napa County nearly operations ore-body ounces owners oxide Placerville porphyry portion pounds profit pyrites quantity quartz quartzite quicksilver rich River roasting rock seams shaft shows Sierra County Sierra Nevada silver slag slates smelting Sonoma County stamps stoping sulphurets sunk supply surface tons Total tunnel Valley vein winze yield