Excerpt from Geology and Ground Waters of the Western Part of San Diego County, CaliforniaOn the other hand, supplies Of ground water, if available at all, are relatively reliable, Gspecially if they are drawn upon only to supplement surface supplies. They are also protected from evapo ration and can be more easily protected from pollution.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.