388 G. M. Wheeler— Geographical and Geological 
ArT. XXXV.—Geographical and Geological Explorations and 
Surveys West of the 100th Meridian; First Lieut. Gro. M. 
WHEELER, Corps of Engineers, in charge. 
THE labors of the Survey, which has for its objects examina- 
tions in the departments of astronomy, topography, meteorolo- 
gy, geology and natural history, have been divided into two dis- 
tinct parts, so far as they refer to the field-season of 1873. Th 
parties have been engaged in the following political divisions: 
1st, Colorado; 2d, New Mexico; 3d, Arizona; 4th, Utah; 5th, 
Nevada; 6th, Montana. The first part or main division 1n- 
The second party, under Dr. F. Kampf, astronomical observer, 
do. Dr. Ka 
c 
to five in number. This will serve as a central or connecting 
station for a great share of the area between the 49th and 32d 
parallels of latitude, limited on the east by the continental divide, 
and with the general Sierra Nevada trend of mountain ranges 
as a western limit. The main line of the Western Union Tele 
