Applied Science, Vol. 21

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Excerpt from Applied Science, Vol. 21: February, 1908 The third consideration and a very important one is that of pressure. Most towns cover a territory more or less varied as to elevation. A great difference in level in the different parts of a town makes the problem somewhat complicated, because the pressure sufficient to carry water to the most elevated district will be embarrassingly great in the lower ones and consequent ly it is frequently necessary to reduce the pressure in the house connections in the latter case. On the other hand it is frequently necessary to have a separ ate high pressure system to reach the more elevated portions of the town. This is generally accomplished by pumping into a small distributing reservoir. This necessitates an independent system of mains. The great advantage of a high pressure at the hydrants is m connection with the fire service. Frequently if the pressure is high, streams may be got upon a fire by merely connect-ing the hose with the hydrants. 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.