SULPHUR TRIOXID IN FOLIAGE OF TREES, ETC. 



49 



Table XIII. ^ — Sulphur trioxid in foliage, in ash, and in soils around Washoe smelter; 

 nearly all samples taken from National Forest or public domain — Continued. 



NORTH OF SMELTER— Continued. 



EAST OF SMELTER. 



Foliage, injured red fir. 



Foliage, uninjured red 

 firs. 



Soil beneath 6343 



Average for soils under 

 uninjured red firs. 



Foliage, injured red fir. 



Foliage, uninjured red 

 firs. 



Soil beneath 0344 



A verage for soils under 

 uninjured red firs. 



Sec. 2, T.4N, R.9W, public 

 domain in National Forest, 

 about 11| miles E of smelter 

 and approximately same 

 distance from Butte. 



Average of four firs taken N, 

 S, and W of smelter, seem- 

 ingly beyond range of fume 

 daniage.' 



Per cent. 

 5.38 



Sec. 2, T.4N, R.9W, public 

 domain in National Forest, 

 about lU miles E of smelter 

 and approximately same 

 distance from Butte. 



Average of four firs taken N, 

 S, and W of smelter, seem- 

 ingly beyond range of fume 

 damage. 



5.39 



Per cent. 

 1.22 



Per cent. 

 22. 08 



21.34 



18.28 



Per cent. 



0.02 

 .02 



.02 

 .02 



