Excerpt from Contributions to Economic Geology (Short Papers and Preliminary Reports), 1910, Vol. 1: Metals and Nonmetals Except Fuels This volume is the ninth of a series that includes Bulletins 213, 225, 260, 285, 315, 340, 380, and 430, Contributions to economic geology for 1902, 1903, 1904, 1905, 1906 (pt. I), 1907 (pt. I), 1908 (pt. I), and 1909 (pt. I), respectively. These bulletins are prepared primarily to insure prompt publication of the economic results of investigations made by the United States Geological Survey. 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.