Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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الصفحة 13
... miles , and a breadth of over two hundred miles , its area being estimated at 154,000 square miles . The State is divided into forty - nine counties , and in twenty - four of these counties mining is carried on to a greater or less ...
... miles , and a breadth of over two hundred miles , its area being estimated at 154,000 square miles . The State is divided into forty - nine counties , and in twenty - four of these counties mining is carried on to a greater or less ...
الصفحة 23
... miles in length , conduct it thence into the mining regions lying adjacent to Bear River and the north and mid- dle forks of the American and their several tributaries , bringing a por- tion of it on to San Francisco , distant nearly ...
... miles in length , conduct it thence into the mining regions lying adjacent to Bear River and the north and mid- dle forks of the American and their several tributaries , bringing a por- tion of it on to San Francisco , distant nearly ...
الصفحة 24
... miles in width and fifty in length , containing numerous towns and mining camps , creating a demand for from ten to twenty thousand inches , at a price of ten cents per inch for ten hours ' use , independent of the large amount needed ...
... miles in width and fifty in length , containing numerous towns and mining camps , creating a demand for from ten to twenty thousand inches , at a price of ten cents per inch for ten hours ' use , independent of the large amount needed ...
الصفحة 27
... miles of this town . And I have no doubt that many more have been picked up and looked at and thrown away , the finders not knowing what they were . During my stay in El Dorado County I have seen and recognized two of these diamonds ...
... miles of this town . And I have no doubt that many more have been picked up and looked at and thrown away , the finders not knowing what they were . During my stay in El Dorado County I have seen and recognized two of these diamonds ...
الصفحة 36
... miles per hour , the boxes are carried down at one side of the posts and up the other , 400 to the mile , each delivering fifty pounds of ore , or ten tons per hour , and they can be run twenty - four hours per day . * Paul's process ...
... miles per hour , the boxes are carried down at one side of the posts and up the other , 400 to the mile , each delivering fifty pounds of ore , or ten tons per hour , and they can be run twenty - four hours per day . * Paul's process ...
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50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California Cañon carbonate cent chemical claim coal commenced company's contains copper cost County course Creek Cupellation December deposits depth developed district ditch drift drill east El Dorado County engine erected Eureka expense extracted feet deep feet in length feet long feet wide furnace galena gangue gold Gold Hill gravel ground Gulch Hill hundred hydraulic inches incline iron labor lead ledge limestone located lode metallurgy metals miles mill miners Mining Company months nearly Nevada opened operations ounces owners placer mines pounds present Professor prospecting quantity quartz quartzite rich River rock San Francisco silver slag slate smelting smelting-works stamps stopes sulphurets sunk supply surface Table Mountain tailings thick tion tons Total tunnel Tuolumne County tuyeres Valley vein width yield