Stream Flow Records of Pennsylvania

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Excerpt from Stream Flow Records of Pennsylvania: For the Year October 1, 1940 to September 30, 1941 The rock formations of the earth are large underground reservoirs in which a part of the water precipitated in the form of rain and snow is stored to supply wells and springs and to maintain the ¿ow in streams during periods of dry weather. Water levels in wells indicate the stages of the natural underground reservoirs. They show the extent to which the subterranean supplies are depleted by drought or by pumpage for domestic and industrial purposes and the extent to which they are replenished by rainfall or melting snow. 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.