Excerpt from Contributions to Chemistry and Mineralogy From the Laboratory of the United States Geological Survey Department OF the interior, united states geological survey. Washington, I). November 4, 1899. Sir: I submit herewith a manuscript entitled Contributions to Chem istry and Mineralogy from the Laboratory of the United States Geo logical Survey. I have the honor to request that it be published as a bulletin of the Survey. Very respectfully, F. W. Clarke, Chief Chemist. Hon. Charles D. Walco'i't, Director United States Geological Sarney. 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.