Silver and Gold: an Account of the Mining and Metallurgical Industry of the United States: With Reference Chiefly to the Precious MetalsJ.B. Ford, 1873 - 566 halaman |
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Halaman 35
... ledge to the mill . It can be used at such locations for the delivery of material or ores in mountainous places or deep gorges ; from the shore to vessels in the offing ; for working up hill and down , and , where there is much descent ...
... ledge to the mill . It can be used at such locations for the delivery of material or ores in mountainous places or deep gorges ; from the shore to vessels in the offing ; for working up hill and down , and , where there is much descent ...
Halaman 44
... ledges . - The investment of large amounts of foreign capital in the purchase and development of our gravel mines and quartz ledges is to a great extent due to the opera- tion of the various congressional acts throwing the mineral lands ...
... ledges . - The investment of large amounts of foreign capital in the purchase and development of our gravel mines and quartz ledges is to a great extent due to the opera- tion of the various congressional acts throwing the mineral lands ...
Halaman 45
... Ledge Wolcott claim . Hancock & Tibbits . Kennedy Gold quartz . Placer Do. Do. Baltic Gravel . Gold quartz . Calaveras . .... do Amador . Saint Lawrence Maxwell Amador . Blue Jacket Socrates .. Railroad Allison Ranch . Red Hill ...
... Ledge Wolcott claim . Hancock & Tibbits . Kennedy Gold quartz . Placer Do. Do. Baltic Gravel . Gold quartz . Calaveras . .... do Amador . Saint Lawrence Maxwell Amador . Blue Jacket Socrates .. Railroad Allison Ranch . Red Hill ...
Halaman 58
... ledges , and the investment of San Francisco capital in developed mines . The mines belonging to the Mariposa estate are so situated that they require water for milling purposes ; the mines are proven to be abun- dantly rich and ...
... ledges , and the investment of San Francisco capital in developed mines . The mines belonging to the Mariposa estate are so situated that they require water for milling purposes ; the mines are proven to be abun- dantly rich and ...
Halaman 61
... ledge . This cut has been continued for nearly 100 feet , and a tunnel run from its face , on the ledge , a distance of 600 feet . Winzes have been sunk from the floor of this tunnel to a depth of 65 feet and a new level opened . On ...
... ledge . This cut has been continued for nearly 100 feet , and a tunnel run from its face , on the ledge , a distance of 600 feet . Winzes have been sunk from the floor of this tunnel to a depth of 65 feet and a new level opened . On ...
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50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California CaƱon 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 metal metallurgy 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