Excerpt from Transactions of the American Institute of Mining Engineers, Vol. 45: Containing the Papers and Discussions of the New York Meeting, February, 1913 The technical papers and discussions contributed to the Institute during the year 1913 will be published in three volumes, of which this volume, containing the papers presented at the New York meeting of February, 1913, is the first. The second of these volumes, to be entitled The Montana Volume, will contain the papers presented at the Butte meet ing, August, 1913, describing the geology of the Butte district and the prevailing mining and metallurgical practice in Montana. The third volume of the year will contain the remaining papers of the Butte meeting, as well as the papers presented at the New York meeting of October, 1913. 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.