Excerpt from An Extension of the Dewey System of Classification as Applied to Mining In extending the classification, the aim has been towards as logical a subdivision as possible. The original classification. Although imperfect, has not been changed. This is because of the Copyright restrictions; also, because of the reverence for the master mind that evolved the entire subdivision of all knowl edge. The imperfections can be seen in the subdivision of Drainage, but to attempt to change it would be inadvisable, be cause so many have already adopted it. The original subdivision is printed separately, so that it may be torn out and posted near the filing case. For placing many articles this will suffice and will save many references to the extended classification. 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.