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Preliminary Report Concerning Explorations and Surveys, Principally in Nevada and Arizona - Softcover
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1872. Excerpt: ... introduced into the ordinary blast furnace, with the requisite amounts of charcoal and salt. This system works admirably, and now enormous returns are secured from these very inaccessible mines. The ore averages from $50 to $03 per ton, in silver, the resulting bars from $260 to $300 per ton. The veins are wide, and the ore occurring in large lenticular-shaped masses trending to the southward; so far as known the supply is inexhanstible. Notwitstanding the expensive freights, the mines are made very remunerative. The cost of transportation to Los Angeles, California, is $55 per ton; thence to San Francisco $20 per ton; thence by Pacific Mail Steamship Company to Newark, New Jersey, at an additional expense of $25 per ton. It was found to be more profitable on account of the higher percentage of silver from the bullion, and the increased price obtained for the lead to ship to Newark, paying the extra expense, rather than to have the refining done in San Francisco. This is only one proof out a number that can be cited, showing the advantage of large establishments where skilled labor can be concentrated, by means of which a still higher and higher percentage can be extracted from rebellious ores, which is a matter of so great necessity, especially in ores of low grade. There are three furnaces smelting ores from three mines, twoatCerro Gordo and one at Swansea, on the northern shore of Owen's Lake. COSO DISTRICT, CALIFORNIA. This district, situated south and east from Owen's Lake, in the Coso Range, has been worked at fitful intervals in a rnde and simple manner. The quartz is gold-bearing. One of the members ef the expedition found about seventy-five persons employed here, mostly Mexicans, who make use of the arrastra process for the extraction of the bull...
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