Biennial Report for 1911 and 1912, Administrative Report and Economic and Geological Papers

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Excerpt from Biennial Report for 1911 and 1912, Administrative Report and Economic and Geological Papers: Certain Reports in Cooperation With U. S. Geological SurveyThe increasing development of the natural resources of Illinois makes necessary a gradual broadening of the Survey's activities. Coal and petroleum continue to hold a large share of attention.Detailed statistics for the calendar years of 1911 and 1912 appear in this bulletin.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.