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Excerpt from Transactions of the American Institute of Mining and Metallurgical Engineers, 1921, Vol. 64: With Which Is Consolidated the American Institute of Metals In this volume are the papers and discussions on Non-ferrous Metal lurgy and Metallography that were presented at the Chicago and Phila delphia meetings, 1919, the Lake Superior and Columbus meetings, 1920, and the New York meetings of 1920 and 1921 Proceedings of the meetings of the Institute of Metals Division in Philadelphia and Colum bus are also included. 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.