Statistics of mines and mining in the states and territories west of the Rocky Mountains Volume 7 - Softcover

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. 1875 Excerpt: ...on the hill, is now being run to reach the works last mentioned, and to further facilitate the extraction of ore and waste, as well as to supply fresh air to the interior western works. The Fall tunnel was not run any farther into the hill this year. The Stewart or eastern main tunnel is within a few feet of reaching the farther incline and drift run east of the Fall tunnel. Prospecting in the mine has been very limited. In the mills of the company some alterations have been made. A new battery of ten stamps has been placed in the Arizona Mill. The engine and boiler of the tailings-mill were also placed in the Arizona Mill, side by side with the old engine and boiler. The mill has now twenty stamps, five Wheeler and four Varney pans, worked by two boilers and two engines, one engine driving the twenty stamps and the other the rest of the machinery. The silver-mill has undergone no changes, except for the necessary repairs. The tailings-mill was run about seven months during the year. The capacity of the pans being too small for the poor tailings worked, the mill was torn down, partly used in repairing the other mills and partly sold for old iron. No dividends have been paid since the incorporation of the company. At the end of the year an assessment of $1 per share was levied, the number of shares amounting to 48,000. The superintendent appointed at the end of 1873 succeeded in extracting from the ore of the Arizona mine, by raw amalgamation, about 10 per cent. more than was obtained before, and increased the fineness of the bullion from.500 to about.920. For certain administrative measures, to which the principal owner of the mine was opposed, he was displaced, and the former administration coming in power, brought back its former manner of amalgamation. T...