Excerpt from The Mexican Mining Journal: Volumes XIX and XX; January to December, 1915 Upon another page of the present issue we print an article on tube milling that should set many of the mill operators in the country to thinking. From the results presented it appears that the tube mill is not by any means the simple grinder that its usual treatment would lead one to think. Evidently there are a large number of conditions that influence the work done. 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.