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Excerpt from Exposition of the Principles of Abbott's Hydraulic Engine, With Tables and Engravings: Together With an Illustration of the Power of Wheels, Heretofore UsedThomas Fenwick fixes the power sufficient to grind 6 bushels of corn per hour, (with a five feet stone) e qual to a vessel containing 375 pounds of water, if applied in a manner as described in Plate No. 3 of the Engravings 3 which power will give the mill stone 100 revolutions per minute, grind the corn and de scend about 3 1-2 feet per second, or 200 feet per minute; which, for mills intended to be moved in a manner described in the annexed engravings, or by the gravity of water is found by careful observation to produce the greatest mechanical effect possible, where time is regarded; or if 575 pounds be applied in the same manner it will grind 12 bushels of corn to the hour, and so on. To give the mechanic a full and perfect understanding of this matter, if there be but 10 feet fall it would require 20 discharges of the ves sel per minute, because it could be used but 1 20th of the 200 feet (descent or velocity) and would con sume 5 tons, 1500 pounds per minute; or if there were 50 feet fall it would require but 4 discharges, and consequently would use but 1 ton, 300 pounds per minute. Besides, if the same labor (namely, 12 bushels ground per hour) were required of an under shot wheel, it appears from a certain table laid down in Mr. Evans' Young Millwright and Miller's Guide, page 154, it would require 43 tons, 250 lbs. Per minute; or if required of a tub wheel, then it would take 46 tons, 1150 pounds of water per min ute, as appears from page 158.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.