Report for 1917/18 consists of three monographs by E. MacBoyle issued separately as Mines and mineral resources of Nevada County. Mines and mineral resources of Plumas County. Mines and mineral resources of Sierra County.

This book provides a detailed overview of the operational principles of modern mining geology, which are presented as a good mix of theory and practice, allowing use by a broad range of specialists, from students to lecturers and experienced geologists. The book includes comprehensive descriptions of mining geology techniques, including conventional methods and new approaches. The attributes presented in the book can be used as a reference and as a guide by mining industry specialists developing mining projects and for optimizing mining geology procedures. Applications of the methods are explained using case studies and are facilitated by the computer scripts added to the book as Electronic Supplementary Material.

The California Journal of Mines and Geology is an invaluable resource for anyone interested in the geology of California. From gold mines to oil wells, this journal covers all aspects of California's mineral wealth. A must-read for anyone interested in the history of mining in the Western United States. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.