PLATES. 
PLATE 1.—11:30 a. m., June 21, 1899. Elevation about 9,600 feet. Look¬ 
ing southwest into dead timber. Medicine Bow Range in the distance. 
PLATE 2.—11:40 a. m., June 21, 1899. Looking northeast into open 
white pine timber. Ground sloping gently to the northwest. Snow drifts 
from three to five feet deep. 
PLATE 3.—3 p. m., June 21, 1899. Looking east. Plates 9, 10, 11 and 
12 were taken near here. Mr. Zimmerman is shown on the drift. 
PLATE 4.—11:00 a. m., June 21, 1899. Looking northwest, showing Mr. 
Zimmerman behind drift. Slopes to the northwest. Drifts hard. Elevation 
about 9,600 feet. Open white pine timber. Nos. 5 and 6 taken from this 
point. 
PLATE 5.—11:00 a. m., June 21, 1899. Looking north from same point 
as No. 4. 
PLATE 6.—11:20 a. m., June 21, 1899. Looking southwest into dead tim¬ 
ber. 
PLATE 7.—10:30 a. m., June 21, 1899. Snow in the open white pine tim¬ 
ber. Slopes to the north. Nearest drift, 60 feet long, 48 feet deep, 15 feet 
wide. Snow granulated. Elevation about 9,600 feet. Looking southwest. 
PLATE 8.—4:05 p. m., June 19, 1899. Near No. 13. Snowdrift in the 
distant green timber. 
PLATE 9.—12 m., June 21, 1899. Looking southwest. Bare slope. Ele¬ 
vation about 9,600 feet. 
PLATE 10.—1:30 p. m., June 21, 1899. Drift 10 feet deep in green tim¬ 
ber. Usually no snow here after June 1st. About 200 yards in timber from 
points where Plates 1 and 2 were taken. 
PLATE 11.—2:45 p. m., June 21, 1899. Snow drift in green timber. 
From same point as Plate 12. Looking east. Ground slopes to east. Drifts 
about 12 feet deep, solid. Same drifts as in plates. Elevation about 9,000 
feet. Four miles back of Zimmerman’s. 
PLATE 12.—2:40 p. m., June 21, 1899. From the same place as Plate 11. 
Looking southwest through dead timber. Mount Cameron in the distance. 
PLATE 13.—8:50 a. m., June 24, 1899. Looking north. Elevation about 
10,000 feet. Headwaters of the Laramie River. Ground slopes to the south. 
PLATE 14.—9:45 a. m., June 24, 1899. Looking southwest. Near No. 
13. Spruce and balsam. 
PLATES 15, 16, 17 and 18.—June 24, 1899. From same point. Eleva¬ 
tion about 9,800 feet. These views overlap, and may unite into one view. 
No. 15, 9:45 a. m. In dead timber, looking west. On south slope. No. 16, 
10 a. m. Looking northwest into green timber. No. 17, 10:15 a. m. Look¬ 
ing north at south slope, showing snow in green timber. No. 18. 10:15 
a. m. Looking northeast. Snow in green timber, bare ground in dead tim¬ 
ber. Showing edge of snow between dead and green timber. 
