EXPLORATIONS AND SURVEYS FOR A RAILROAD ROUTE FROM THE MISSISSIPPI RIVER TO THE PACIFIC OCEAN. 
WAR DEPARTMENT. 
ROUTES IN CALIFORNIA TO CONNECT WITH THE ROUTES NEAR THE THIRTY-FIFTH AND THIRTY-SECOND 
PARALLELS, AND ROUTE NEAR THE THIRTY-SECOND PARALLEL, BETWEEN THE RIO GRANDE AND PIMAS 
VILLAGES, EXPLORED BY LIEUTENANT JOHN G. PARKE, CORPS OF TOPOGRAPHICAL ENGINEERS, IN 
1854 AND 1855. 
BY 
JOHN TORREY, M. D. 
WASHINGTON, D. C. 
185 6 . 
