SIG IE IIB IS NR TE RCAUN TS UPTO ae 
DEPARTMENT OF THE INTERIOR, 
Unirep Stares GEOLOGICAL SURVEY, 
Washington, June 30, 1896. 
Sir: I have the honor to transmit herewith the manuscript of the text 
and drawings for the illustrations and atlas of a report on the Geology of 
the Aspen Mining District of Colorado, by Mr. Josiah Edward Spurr, and 
to request that it be printed as one of the monographs of the Survey. 
Very respectfully, your obedient servant, 
S. F. Emmons, Geologist in Charge. 
Hon. Cuarues. D. Watcort, 
Director Umited States Geological Survey. 
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