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EXPLORATIONS AND SURVEYS FOR A RAILROAD ROUTE FROM THE MISSISSIPPI RIVER TO THE PACIFIC OCEAN, 
WAR DEPARTMENT. 
ROUTE NEAR THE THIRTY-SECOND PARALLEL, FROM THE RED RIVER TO THE RIO GRANDE, 
EXPLORED BY BVT. CAPT. JOHN POPE, TOP. ENGINEERS, IN 1854. 
REPORT 
THE GEOLOGY OF THE ROUTE, 
NEAR THE THIRTY-SECOND PARALLEL: 
PREPARED FROM THE COLLECTION AND NOTES OF CAPT. POPE, 
WILLIAM P. BLAKE, 
GEOLOGIST OF THE OFFICE OF THE UNITED STATES PACIFIC RAILROAD SURVEYS. 
WASHINGTON, D. C. 
1856. 
