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. 1901 Excerpt: ...from the class of machine employed, the concentrates obtained in a custom mill at Oldham were of such a high value that it is surprising that attention was not given to the concentrating of tailings in other parts of the province at a much earlier date. The average value of the concentrates obtained at Oldham was from ...
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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. 1901 Excerpt: ...from the class of machine employed, the concentrates obtained in a custom mill at Oldham were of such a high value that it is surprising that attention was not given to the concentrating of tailings in other parts of the province at a much earlier date. The average value of the concentrates obtained at Oldham was from sixty to seventy dollars per ton of 2,000 lbs. I am given to understand, however, that no systematic record was kept of the percentage of concentrates saved, nor of the gold lost in the tailings after they had been over the concentrators. At the Lake View Mines at Waverley, eight Frue Vanners were erected to treat the tailings from 30 stamps, or two-thirds the number required by good practice. So that here, although the class of machines was excellent, the number of machines was insufficient to handle the quantity of tailings going over them, and good results were consequently not obtained. The value of the concentrates, which at times contained a considerable proportion of sand, ranged from eight to thirty dollars per ton. About 1881 W. A. Mirral of Colorado, started a chlorination plant at Waverley. The plant consisted of a very small hand roasting furnace, and a home made Plattner Chlorination plant of the crudest description. The whole thing proved a complete failure. Two years later B. A. Temple of Waverley joined Mirral, and put in a new furnace and new leaching and precipitating vats, &c, to start a Plattner plant. I have examined this plant and have never seen or read of anything quite like it. The early attempts at cyaniding met with a fate similar to that of chlorination. Dr. Kendall and his assistants came from the States and erected a plant at North Brookfield, with a view to treating an old tailing dump at that time (about 189...
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