Excerpt from Petroleum Industry in Illinois in 1956: Part I. Oil and Gas Developments, Part II. Waterflood Operations The greatest activity was in the northern part Of the productive area Of the state. Details of development and production are discussed by counties with special attention to noteworthy areas. Reserves are estimated at million barrels. 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.