Excerpt from Uranium in Illinois Black Shales Numerous requests have been received by the Illinois State Geological Survey for information regarding the significance of Illinois black shales as possible sources of uranium. This report gives the results of a preliminary investigation to supply such data. It further serves as a basis for judging the importance of the shales in connection with possible future developments in the field of source materials of radioactive substances. Other members of the Survey staff who have contributed to this report are 3. A. Simon and J. E. Lamar. P. E. Potter, H. B. Stonehouse, J. C. Bradbury, and C. W. Spencer aided in the collection of samples. 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.