Transactions of the American Institute of Mining, Metallurgical and Petroleum Engineers Volume 55


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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. 1896 Excerpt: ...of the first concentrate and the percentage of middlings to be re-crushed and re-separated can be accurately controlled. There was no such discriminating power in the earlier types of separators; and, although a part of the ore obtained from a first separation might again pass through a second and sometimes a third ...