24 BULLETIN 1233, l\ B. DEBARMENT OF AURIC I LTUKE. 



Soil thermometers. 1 foot in wooden tube,- and 4 foot in iron pipe. 

 All records at this station except those for sunshine, rainfall, and soil tempera- 

 tures were discontinued about the end of 1913. 



W-D: Wagon Wheel Gap burned tench spruce. — Elevation, 11,000 

 feet; aspect, east; slope, 5 per coat. This point is typical of much of 

 the best spruce land in southern Colorado and represents a high, 

 well-watered bench of deep, transported soil, partially protected on 

 the west by a higher ridge and fully open to the sun. (See PL XI, 

 fig. 1.) The stand, evidently a very heavy one. was completely 

 killed, probably by the fire which swept this region 25 years ago. 

 The occasional spruce seedlings which have come in do not affect 

 present conditions as measured. The ground is covered by a heavy 

 sod, mainly of sedges. Dead trees, standing and down, furnish con- 

 siderable protection, but can hardly affect the wind record of the 

 station, which has been taken at a point 20 feet above the ground, 

 in order to eliminate purely local influences. 

 The station has been equipped with: 



Maximum and minimum thermometers, in shelter, about 8 feet above ground, 

 read at 6-day intervals. 



Air thermograph, in shelter. 



Psychrometer. 



Anemometer, on pole 20 feet above ground, connected with register at 

 headquart 



Eight-inch rain gage. 



Tipping-1 n gage, connected with register. 



Marvin shielded rain and snow gage. 



Soil thermometers, 1 foot in wooden tube, 3 and 4 foot in iron pipe, read every 

 6 days. 



Soil well, for moisture determinations, at depths of 1, 2, and 3 feet, every G 

 Q season. 



W-G: Wagon Wheel Gap high-ridge spruce, — This station is located 

 at 11,580 feet, on an east-west ridge. The soil thermometers are on 

 ground sloping almost inappreciably to the south. This slope is 

 hardly sufficient to a ty oilier condition measured. Although 



the station is within about 500 feet of thnberline, and the soil of the 

 ridge is ^ ery rocky, the spruce is of remarkably good quality, running 

 up to 70 feet in height, while even on better soils near by it rarely 

 attain- more than SO feet, (See PI. X, iig. 2, and PL XI, fig. 2.) 



An opening in the forest of about 1 acre was made in 1913, when 

 this station was established, in order that atmospheric conditions 

 and sunshine might be recorded free from the direct effect of the 

 fores record is supplemented by soil temperature and mois- 



ture - E and F, located only a few hundred feet 



awa <>n aortherly slopes in the hear! of the 



forest. Stations E 3 F, andG were abandoned at the end of December. 

 it; 17. 



The equipmenl of Station W-G consists of: 



Maximum and minimum thermometers, in shelter, 8 feet above ground, read 



Air thermograph, u 



>rder, opera ted <>nh during wintei 

 Tip t rain ga »nlj during summer Beason. 



Mai 



i thermomi bers, i fool in v. ooden tube," and t foot in iron pipe, read every 



