Transactions of the American Institute of Mining, Metallurgical and Petroleum Engineers Volume 6

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...but a large force can always be kept employed on a very large mass until it is entirely cut up. The quantity that three men can cut in a day will generally be about three-quarters of a foot, which, supposing the mass to be one foot thick, would bring the cut back nine inches. The contracts are let by ...

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