34 INJURY BY SMELTER WASTES. 
To further prove that the Deer Lodge River water when applied 
_to the land adds excessive amounts of copper thereto, the soil irri- 
gated by said water was sampled at various distances from the 
smelter to determine both the soluble and insoluble copper present. 
To further demonstrate that any large amount of copper found was 
not naturally present in the soil, samples not irrigated by the Deer 
Lodge River and not exposed to the action of the flue dust (Nos. 4163 
and 4165) were also subjected to analysis. Following are the results 
obtained by the examination of the samples gathered in the summer 
of 1906: 
TABLE X.—Copper content of surface foot of soils collected in 1906. 
[Caleulated to dry basis. ] 
es Origin and description of sample. eee poe 
Parts per | Parts per 
million. million. 
4185____| 84 miles NE of smelter; irrigated by Deer Lodge River___-___-__- 1,549.4 20.4 
4183____| 9 miles NE of smelter; irrigated 12 years by Deer Lodge River_- 458.4 3.4 
4184____| 12 miles NE of smelter; irrigated by Deer Ledge River______-_-__ 1,451.6 118.2 
4182____| 12 miles NE of smelter; irrigated hy Deer Lodge River________-__ 2,790.8 118.2 
4186____| 14 miles NE of smelter; irrigated 16 years by Deer Lodge River-_- 870.4 ell 
4165____| 15 miles W of smelter; not irrigated by Deer Lodge River________ Trace. None. 
4163____| 10 miles SW of smelter and about 2 miles beyond divide; not 
Mea ecReol) lone IDYsvere Ibpoxolkexsy TRohweies Ss 13.0 Trace. 
Bo ee OME ee See eee ers : =a ieee ae ee = 
It is evident from the preceding table and what has been said of | 
the action of copper on plants that the soils irrigated from the Deer 
Lodge River contain very large quantities of copper, enough of 
which is in a soluble condition to interfere seriously with the growth 
of many forms of vegetation. It is also evident that the soils beyond 
the range of flue dust and not irrigated by Deer Lodge River water 
contain very small quantities of copper, practically none of which is 
in a soluble condition. 
The analyses given in Table X show such excessive amounts of 
copper in the soils irrigated by Deer Lodge River water that the writer 
was not willing to publish the results until they had been confirmed 
by collecting and examining new samples. The results given in 
Table XI were obtained on samples collected in 1907. 
TABLE XI.—Copper content of surface foot of soils collected in 1907. 
[Caleulated to dry basis. ] 
Serial Insoluble Soluble 
No. Origin and description of sample. copper. copper. 
Parts per | Parts per 
million. million. 
4871__--| 8 miles NE of smelter; flooded by Deer Lodge River; no sam- 
JOEY Te eaal TaeOaN HOV) sl wha WOW see 10,018.9 esi 
4872____| 82 miles NE of smelter; irrigated by Deer Lodge River; sample 
fron same field (CNo. 4185) ke¢aken in) 1906222222 ee ee ee 979.9 Us 
4873___-| 98 miles NE of smelter; irrigated twelve years by Deer Lodge 
River; sample from same field (No. 4183) taken in 1906_______- 312.9 Qal 
4874___-| 12 miles NE of smelter; irrigated by Deer Lodge River; sample ; 
from same feld’@Nos 4184) mtaken ansl90622 sae eee a eee 98.7 ell 
4875_---| 12 miles NE of smelter; irrigated by Deer Lodge River; sample 
af from same field (No. 4182) taken im 1906-__---=_---_---2=) 3 624.6 10.4 
4876_--_| 14 miles NE of smelter; irrigated sixteen years. by Deer Lodge 
River; sample from same field (No. 4186) taken in 1906__-_---- 739.8 5.2 
