H.R .EXP 0 C.N? 56-36™ CONG. I" SE S S. 
jiiutle Was I 
EXPLORATION'S AND SURVEYS FOR. A RAIL, ROAD 
FROM THE MISSISSIPPI RIVER TO TOE PACIFIC OCEAN 
WAR.DEPARTMENT. 
»j j<l slanty 
ISOTH ERMAi, CHART 
OftheKcgwnSortliofflw36''!tPa/-aZM. &c&g between the 
ATLANTIC RPACIFIC OCEANS, 
Compiled under the Direction.of 
ISAAC I. STEVENS, 
■Goy^f of Wasliin^lon Territory 
►PtKem iic 
Hetijonsporf 
Scale. 1: 7 , 450 , 000 . 
- J^rar/zcaMeftmlroad Lines. 
The Tied Lines are isothermal? ofmean Hummer '/hnperdlirte 
j, Bhtr „ ... ~ Winter 
Saromy Ma jor dr Knapp ,Li?hM49Broad? NX 
