LETTER OF TRANSMITTAL. 



DEPARTMENT OF THE INTERIOR, 

 UNITED STATES GEOLOGICAL SURVEY, 



Washington, D. (7., Novembers, 1904. 

 SIR: I have the honor to transmit herewith the manuscript of a pre- 

 liminary report on a "Resurvey of the Cripple Creek district of Colo- 

 rado," by Messrs. Waldemar Lindgren and F. L. Ransoine, under my 

 general supervision. 



Although only ten years had elapsed since a careful study of the 

 geology of this district was made by Messrs. Cross and Penrose, the 

 people of Colorado had been so strongly impressed with the economic 

 importance of a scientific examination of the ground opened by mining 

 operations during that period, that they urgently requested this resur- 

 vey and have materially assisted in its execution. 



The present report, made in advance of the final laboratory exami- 

 nations, is a summary of those facts that bear upon the economic 

 development of the region and are of immediate importance to the 

 miners. I therefore request that it be published with the least possi- 

 ble dela}^ r that its results may be promptly available to all interested 

 in the region. 



Very respectfully, 



S. F. EMMONS, 



Geologist in Charge Section of Metalliferous Deposits. 

 Hon. CHARLES D. WALCOTT, 



Director United States Geological Survey. 



