196 GEOLOGICAL SURVEY OF THE TEREITOEIES. 



increase tliis. The officers are as follows : D. Colton, of San Francisco, 

 president j Fox Diefendorf, of Corinne, vice-president ; H. K. White, of 

 San Francisco, secretary ; 0. T. Deuel, resident at the mines, superin- 

 tendent ; and G-. A. Henry, of San Francisco, general agent. The coal is 

 a lignite, of a very black color, and having a high luster. It breaks into 

 parallelopipeds. It contains from 71 to 73 per cent, of carbon. The 

 value of this bed of coal can scarcely be estimated, especially as it is 

 situated in a country where timber is so scarce, and even the small 

 amount that does exist is so liable to be destroyed by fires in the fall 

 of the year, as we observed on our way ux^ Bear Eiver YaUey. The 

 iron ore that lies beneath the coal is of a light brownish-gray color, 

 being argillaceous. It contains 35 ]3er cent, of oxide of iron, 30 per 

 cent, of lime, and 20 per cent, of silica. We left Evanston on the 1st 

 ©f October, and arrived at Fort Bridger the following day, where the 

 exi^edition disbanded. 



