LETTER OF TRANSMITTAL. 



San Francisco, Cal., January 1, 1884. 

 Sir: I have the honor to transmit herewith a memoir on the Eureka 

 Mines by Mr. J. S. Curtis. I visited the more important mines with Mr. 

 Curtis at the conclusion of his field work, and have carefully scrutinized 

 the conclusions drawn from it. So far as I am able to judge, the obser- 

 vations are correct and the inferences from them sound. 

 Very respectfully, your obedient servant, 



G. F. BECKER, 

 Geologist in charge, Pacific Division. 

 Hon. J. W. Powell, 



Director U. S. Geological Survey. 



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