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Excerpt from Coal, Iron, and Oil, or the Practical American Miner: A Plain and Popular Work on Our Mines and Mineral Resources, and a Text-Book or Guide to Their Economical Development The average duty of 35 Cornish pumping-engines at work in Eng land during 1864 was pounds lifted one foot high with a con sumption of one pound of coal. But in an estimate of this character we cannot assume even the average consumption of the Cornish engine to be the rule, since the consumption of coal to the power produced, by the ordinary English engines, is at least double. We presume that pounds lifted one foot high by the combustion of one pound of coal is nearer to the rule than the exception. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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9781391629599

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