24S Prof. Hayden's Explorations . [April, 
dependent upon looking for springs. Farther west still the 
Green River group sets in, forming those numerous canons 
of which that of the White River is one. 
Having completed their work by October 14th, the party 
marched eastward through Middle Park, and after twelve 
days of rain and snow reached Boulder City, Colorado. 
The field work of the Yampah division during the past 
season was principally confined to a district of north-eastern 
Colorado lying between the Yampah and White Rivers, and 
between Green River and the subordinate range of mountains 
that lies west of and parallel with the Park range. The area 
is embraced between parallels 39° 30' and 40° 30', and meri- 
dian io7°30 / and io9°3o'. 
The party consisted of Mr. G. R. Bechler, topographer, 
directing, accompanied by Dr. C. A. White, the well known 
geologist. They proceeded southward from Rawlins Springs, 
a station on the Union Pacific Railroad, August 6th, toward 
their field of labour. From Rawlins Springs to Snake River, 
a distance of 80 miles, table lands form the chief feature of 
the topography, while from Snake River to the Yampah 
River the surface is more undulating, and thickly covered 
with sage. Between the Yampah and White Rivers, a dis- 
tance of 50 miles, the country is mountainous, and on the 
divide between the Yampah and White Rivers the elevation 
is 8000 to 9000 feet. Mr. Bechler, after having formed the 
geodetic connection with the work of previous years, con- 
cluded to finish the more mountainous portion of the area 
assigned to him, which began from a line of meridian with the 
White River Agency, and extended westward to about io8°io'. 
Here the party found water and grass in abundance, with one 
exception. The plateau country, however, was so destitute of 
water, and so cut up with dry gorges or canons, with scarcely 
any grass or timber of any kind, that travelling was rendered 
very difficult. The party therefore made White River its 
base of supply for water and grass, making side trips into 
the barren hill-tops or plateaus in every direction. 
From the Ute Agency, which is located approximately 
in latitude 38° 58' and longitude 107° 48', the White River 
takes an almost due west course for 15 or 18 miles, most of 
the way through an open valley, with here and there narrow 
gorges. About 50 miles from the Agency the river opens 
into a broad barren valley, with only here and there scanty 
patches of vegetation. Soon after, the river enters a deep 
canon, with vertical walls 1000 feet or more in height, and 
continues to increase in depth until the river flows into the 
Colorado of the west. 
