Excerpt from California Journal of Mines and Geology, 1942, Vol. 38: Quarterly Chapter of State Mineralogist's Report XXXVIII Pages are numbered consecutively throughout the year and an index to the complete report is included annually In the closing number. Beginning with the 1930 issues, the activities and progress of the Geologic Branch are recorded also in these quarterly chapters. The important part that geology plays In the economic development of our mineral resources is further recognized in the change of title from Mining in California to california journal OF mines and geology, beginning with the January, 1933, chapter. While current activities of all descriptions are covered in these chapters, the practice of issuing from time to time technical reports on special subjects will be continued as well. A list of such reports now available is appended hereto, and the names Of new bulletins will be added in the future as they are completed. The chapters are subject to revision, correction and improvement. Constructive suggestions from the mining public will be gladly received, and are invited. The one aim of the Division of Mines is to increase its usefulness and to stimulate the intelligent development of the wonderful, latent resources of the State of California. 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.