EXPLORATIONS AND SURVEYS FOR A RAILROAD ROUTE FROM THE MISSISSIPPI RIVER TO THE PACIFIC OCEAN. 
WAR DEPARTMENT. 
bel Rubs! 
BGs Sie TaN. Cab Rok As) RODS 
ASSISTANT SECRETARY SMITHSONIAN INSTITUTION. 
WITH THE CO-OPERATION OF 
JOHN CASSIN AND GEORGE N. LAWRENCE. 
WASHINGTON, D. Cc. 
1858. 
b 2* 
