56 
The Coeorado Experiment Station 
TABLE XXI.—PRECIPITATION, LODGEPOLE PINE FOREST ZONE. 
Station 
Altitude 
County 
Mean 
Annual 
Mean 
Annual 
Ashcroft . 
9483 
Pitkin . 
Precipitation 
20.78 
Snowfall 
148.1 
Breckenridge . 
9524 
Summit . 
24.03 
199.4 
C'assels . 
8445 
Park . 
13.57 
51.8 
Crested Butte . 
8867 
Gunnison .... 
25.82 
157.5 
Cripple Creek. 
9396 
Teller . 
17.19 
83.9 
Dillon . 
8800 
Summit . 
13.51 
94.0 
Dumont . 
8000 
Clear Creek . . 
17.56 
75.0 
Estes Park Fish Hatchery.... 
8000 
Larimer . 
18.35 
102.0 
Frances . 
9300 
Boulder . 
28.66 
175.0 
Fremont Experiment Station.. 
8850 
El Paso. 
18.08 
90.7 
Hermit . 
9843 
Hinsdale . 
19.22 
12.5 
Long’s Peak (near). 
8600 
Larimer . 
19.83 
127.0 
Whitepine . 
9500 
Gunnison .... 
. . . - 33.30 
157.0 
Average. 
. 25.53 
112.9 
profitable agriculture. The area is economically adapted to lum¬ 
bering and grazing. 
WHITE FIR FOREST ZONE 
The white fir (Abies concolor), plant community belongs to 
the southern mountains of the State. Here, it takes the place of 
lodgepole pine of the northern mountains. Its common altitudinal 
range is 8,000 to 10,000 feet. Its climate is very similar to that of 
the lodgepole pine association, and it bears the same relation to 
agriculture. 
ENGELMANN SPRUCE-BALSAM FIR FOREST ZONE 
This forest comes in at an altitude of about 10,000 feet, and 
extends to timber-line. It covers all the high mountain ranges and 
isolated peaks. There are open parkings and streamside meadows 
in abundance, and summer grazing is excellent. On account of its 
low temperatures, the growing of crops is excluded. Some native 
hay is cut here and there. The association indicates non-agricul- 
tural climatic conditions. 
ACKNOWLEDGMENTS 
Special thanks are due Mr. Frederick H. Brandenburg, Dis¬ 
trict Forecaster and Section Director of the Weather Bureau, who 
placed the records of his office at the disposal of the writer; Mr. 
V. M. Cone, of the Colorado Experiment Station, for his helpful 
criticisms of the manuscript; Mr. Robert E. Trimble, also of the 
Colorado Experiment Station Staff, who granted the use of the 
records of his office, and who gave valued suggestions; Mr. Nor¬ 
man Lee Foster, who assisted in the field work, and in the prepa¬ 
ration of some of the figures; and Mr. Carl Hopkins and Mr. C. Z. 
Wight, who helped in the compilation of climatological data. The 
writer assumes full responsibility for all errors. 
