Excerpt from The Water Resources of Illinois The glacial deposits yield such an abundance of good water that over a large part of the State but few wells have gone below these deposits. Where the drift is thin, wells have entered the rock. In northern and western Illinois much prospecting for artesian water has been done. The logs of wells are seldom sufficiently full or reliable to warrant publication, and the writer has had very little opportunity to examine well drillings. From many of the wells, however, information of more or less value has been Obtained which throws light upon the character and availability of such water. No investigation of the water power of the streams has been under taken further than the collocation of results obtained by others; but the use of streams as sources for city water supply has been investi gated, and analyses of waters from this source, as well as from other sources, have been obtained. 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.