REPORT OF HENRY GANNETT, M. E., TOPOGRAPHER. 



LETTEE OF TRANSMITTAL. 



Washington, D. 0., January 21, 1879. 

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

 the geographical work of the Green River division during the field 

 season of 1877. 



The party, consisting of seven men, left Green River City, Wyo., on 

 June 1, and commenced work almost immediately. They continued 

 work until the end of September, losing but one day during the season 

 from bad weather. 



The season was an eminently successful one, and this success is due 

 in no small part to my assistant, Mr. J. E. Mushbach, who worked 

 throughout with his customary ability and care. 



As hi previous years, my thanks are due to Dr. A. C. Peale, the geolo- 

 gist of my party, for his assistance in my own work. 

 With high respect, I am, very truly, yours, 



HENRY GANNETT. 

 Dr. E. Y. Hayden, 



United States Geologist 



673 

 43GS 



