28 
INJURY BY SMELTER WASTES. 
0.09 per cent. It is evident that the amount found in the dump 
can not account for the 66 tons of arsenic that go to waste; hence 
a considerable quantity must be volatilized. According to the inves- 
tigations of Harkins and Swain, previously mentioned, the average 
amount of arsenic trioxid thrown off in the smoke during twenty- 
four hours is 59,270 pounds. Here again, however, as in the case of 
the sulphur compounds, the quantity of ore used was not given. 
It is next necessary to show whether or not the escaping arsenic 
settles on the surrounding forage crops in large enough amounts 
to be injurious to cattle. For this purpose 20 samples of range grass 
and such cultivated crops as alfalfa were collected at distances vary- 
ing from 1 to 10 miles from the smelter in various directions, but 
more especially down the Deer Lodge Valley. These samples were 
examined for total and soluble arsenic. The results obtained, caleu- 
lated to a dry basis and expressed both as milligrams of arse ious 
oxid per gram of sample and grains of arsenious oxid per daily ration 
of 25 pounds, are given in Table VI. 
TABLE VI.—Arsenic content of forage expressed as arsenious oxid. 
[Caleulated to dry basis. ] 
Water-sol- 
hier Arsenious |. Water-sol-|uble arseni- 
Approximate | eae Oxid per 25|uble arseni-| ous oxid 
Serial al rip distance and di- = a‘ pounds av-| ous oxid per 25 
No. DES Duo Gus Seva ee rection from | era ee oirdupois | per gram pounds 
smelter. ‘ple of dry of dry avoirdu- 
| a ration. sample. pois of 
dry ration. 
| Milligram.| Grains. | Milligram.| Grains. 
ee es| Bunchrsnasss=s 2 = seen armies eae | 0.103 18.0 0.683 14.5 
AT0GSS2S AN alli ay eee tee eee 2% miles N__-_-_--. -069 IPs .041 CS? 
ALi h22- | SPASbUneNeTASSe se SenileseNe ese = - 069 WI 028 4.9 
ANN x = Sl) IRENE. (ei Ses ee a Terese doe =e 054 9.5 .034 6.0 
A622 Pasture grasses sesso | 4 miles N., Lost 041 ee, . 020 300 
Creek. 
AiO; tae |eRed topes = ee ae | 4 miles NE__.___ 028 4.9 014 2.5 
4118____| ClO Versa: see Beare [tee ee LO) =. ee 054 9.5 .028 4.9 
AMG? =o S| FRANSES EASS ee epee ea eee Oa eee .090 15.8 .020 3.5 
4120____| Alfalfa and clover (just | 43 miles NE____- .0a4 9.5 .020 3D 
cut). | 
ALOSSEE Red ito press ae eee eet ane ' 5 miles NE____-. .055 9.6 028 4.9 
AN ieee VENT e OF Oras Sires = ian ENG] Gee ee .090 15.8 .069 a bae | 
ANOS Se ee Gotiat esa Sari eee (osmTlespNpE aie . 104 18.2 | O41 Gare 
CM DAS oe area CORSE oe ok ers Salts SannillesNewe sees .055 9.6 .028 4.9 
All Q9 Beara te Alia lia leis ee ge aiereeines ake 10 miles NE____- .070 1WDes} 042 7.4 
ICH ESEE SIT RYeVO HO) Dare ee Wak sony) Sp 069 WOT O41 ev 
AMIGA LE IBN TG Mua A eS S3 oo ese .042 7.4 . 020 one) 
ANI O25 SHIelGs Sassi ee (Sales, Je .055 9.6 041 CZ, 
Ale t== py Pay Se SS eee in eee [ove te Goss siete O41 ars .028 4.9 
(NBs late nave fees ee = A | 4 miles W__---_- 055 9.6 -028 4.9 
AUG Selly JeyonaVOlol feenisce Sak Ee | 63 miles) W2s2 = - 055 9.6 .028 4.9 
a Supposed to have killed cattle. 
Irom this table it is seen that arsenic was found in considerable 
quantities in every sample examined. In order that the cattle in this 
region may live at all it is evident that they must become confirmed 
arsenic eaters. Through the courtesy of Dr. D. E. Salmon the writer 
was able to examine microscopic sections and gross specimens of 
the viscera of a number of cattle that it was thought had been killed 
