32 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: aes 
TABLE X.—Copper content of surface foot of soils collected in 1906. 
[Caleulated to dry basis. ] 
Serial Origin and description of sample. ae ares 
| 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 Chslh 
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 
| Inne atedishy7 - Dees IbOG ee LUC ea ee el eee 13.0 Trace. 
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. 
[Calculated 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- 
plestakenSirom: thisetield sini! 9 0G ama en eee ee 10,018.9 12 
4872__--| 84 miles NE of smelter; irrigated by Deer Lodge River; sample 
LLOM Same tela GNO 41'S) ie Ge kena tne (6 eee ee 979.9 Wail 
4873__--| 9} miles NE of smelter; irrigated twelve years by Deer Lodge 
River; sample from same field (No. 4153) taken in 1906________ 312.9 eee Dit 
4874____| 12 miles NE of smelter; irrigated by Deer Lodge River; sample 
from same field GNoe 41s) etakengin 9062. eee 98.7 24 
4875_---| 12 miles NE of smelter; irrigated by Deer Lodge River; sample 
from same field= (No: 4182)i-taken im 190622222 = eee 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 
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