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, EXPLORED BY LIEUT. R. S WILLIAMSON, CORPS OF TOP. ENG., IN 1853. 



ZOOLOGICAL REPORT. 



WASHINGTON, D. C. 

 1859. 



