PLate I. 
JOE 
Talal: 
Ve 
V. 
Walk 
. Fig. 1.—View of a mountain side about 24 miles west of Washoe 
VILL. 
ILLUST KAT Os: 
PLATES. 
Keswick smelter near Redding, Cal., in operation .............-..-- 
Fumigation chamber for testing effects of sulphur dioxid on young 
[hoo ee ee ee re LO NaN A Ui ioe ele oe silo Gd oon 
View about 2 miles south of Keswick smelter near Redding, Cal... -- 
View about 3 miles west of Keswick smelter near Redding, Cal--.-- 
Washoe smelter at Anaconda, Mont., in operation............-..-- 
Map of region around Anaconda, Mont. (folder)...................- 
smelter—formerly covered with timber toward the summit, but 
now bare. Fig. 2.—View of a mountain side about 3 miles west 
from Washoe smelter—red firs killed and junipers apparently 
uninyured: 20.2250). 2 ee Re ee Ae 
Fig. 1.—View of a mountain side about 104 miles west from Washoe 
smelter—red firs killed and lodgepole pines injured.Fig. 2.—View 
of mountains about 11 miles west from Washoe smelter........-- 
. Fig. 1—Uninjured mountain side about 2 miles south of divide 
and 10 miles south of smelter beyond range of apparent damage. 
Fig. 2.—Uninjured mountain side up Dry Cottonwood Creek be- 
yond ranger’s cabin, about 14 miles ENE of smelter, beyond 
range of apparent.damage. 2.144.558 sss aes eee 
24 
24 
38 
