CONTENTS OF VOLUME XI. ۰ 
I. LETTER OF CAPTAIN A. A. HUMPHREYS, CORPS OF TOPOGRAPHICAL ENGINEERS, TO THE SECRETARY OF 
WAR, TRANSMITTING LIEUT. WARREN’S MEMOIR. 
II. MEMOIR OF LIEUT. G. K. WARREN, CORPS TOPOGRAPHICAL ENGINEERS, UPON THE MATERIAL USED AND 
METHODS EMPLOYED IN COMPILING THE GENERAL MAP TO ILLUSTRATE THE BEPORTS OF SURVEYS 
FOR RAILROAD ROUTES FROM THE MISSISSIPPI RIVER TO THE PACIFIC OCEAN. —— 
IH. TOPOGRAPHICAL MAPS, PROFILES, AND SKETCHES, TO ILLUSTRATE THE VARIOUS REPORTS OF SURVEYS 
WOT TTATTC AD DA 
es 
b 
4 
۳ 
^ 
ot 
e 
ae 
E 
pem es 
2 
N 2 
- 2 é 
pom 
۰ E 
* A 
eu sa A 
CER X 
= 
^ X 
x 3 
RE) / E 3 Pare: 
Ji ex 7 ۳ A 1 Yt ; 
۳ ج 7 تا‎ - 2 į f es desi 3 
" is x ۳ y is 
XT iR ES a 3 m EU E: 
m E 
