LETTER OF TRANSMITTAL 



To His Excellency 



The Honorable Earl Warren 



Governor of the State of California 



DEAR SIR : 



I have the honor to transmit herewith Bulletin 141, "Geologic Guidebook 

 Along Highway 49 Sierran Gold Belt", prepared under the direction of Olaf P. 

 Jenkins, Chief of the Division of Mines. The volume contains a series of geologic 

 maps covering the entire highway, a strip of country 277 miles in length. Numerous 

 photographs and other illustrations accompany the articles which make up this 

 bulletin. The book represents the CENTENNIAL EDITION of the Division of Mines, 

 describing THE MOTHER LODE COUNTRY. It has been carefully compiled from vari- 

 ous published and unpublished sources of information supplemented by notes 

 taken during field investigations carried on particularly for this volume. Besides 

 the ten different authors who have written the chapters of this bulletin, a score of 

 other mining men and geologists have contributed information. 



Bulletin 141 is a semi-technical treatise prepared to serve as a guide to the 

 traveler who is desirous of information concerning the mines, minerals, and rocks 

 of the region, as well as the old structures erected during the Gold Rush Days. It is 

 not merely intended for use during the Centennial celebrations, but should serve 

 as a basis for future studies and investigations for many years to come. 



Respectfully submitted, 



WARREN T. HANNUM 



Director, Department of 



Natural Resources 



August 1, 1948 



