REPORT OF F. M. ENDLICH, S. N. D. 



LETTER OF TRANSMITTAL. 



Office op U. S. Geological and Geographical 

 Survey of the Territories, 

 Washington, D. C, February 11, 1878. 

 Sir : I have the honor to transmit herewith a report on the erupted 

 rocks of Colorado. 



This memoir is entirely distinct from my regular geological report of 

 operations during the season of 1876, heretofore transmitted, and may 

 be published independently. 



Very respectfully, your obedient servant, 



E. M. ENDLICH. 

 Dr. F. V. Hayden, 



United States Geologist-in-charge. 



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