SECOND ANNUAL REPORT 



OF THE 



UNITED STATES GEOLOGICAL SURVEY 



OF THE TEREITOEIES, 

 EMBRACING ^VYOMINa. 



BY 



F, V. HAYDEN, U. S. Geologist. 



CONDUCTED UNDER THE AUTHOEITY OF THE COMMISSIONER OF 

 THE GENERAL LAND-OFFICE. 



1868 



5 H 



