30 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, calcu- 
lated to a dry basis and expressed both as milligrams of arsenious 
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. ] 
| in W W ater-sol- 
: rsenious 7ater-sol-|uble arseni- 
< Approximate | eae oxid per 25/uble arseni-| ous oxid 
erial Ane distance and di- pounds av-| ous oxid per 2a 
No. Description of sample. rection from Hes Oirdupois | per gram pounds 
smelter. | le of dry of dry avoirdu- 
Die: ration. sample. pois of 
dry ration. 
| 
| 
Milligram.| Grains. | Milligram.| Grains. 
ATIG= Ss | BuncChpoenasss.. ssa 2hnilesmiNieees a= | 0.103 18.0 0.683 14.5 
A1OGS=2 | WAN Fea liiares ote eee See 2% miles N__--__.-. | . 069 WBell .041 2 
Alban ||P astureserassas= i eseeae: Ssmiles Naas | . 069 Ze .028 4.9 
ZN Go.) UREN Oe RG eee GOSS hes -aus | .054 9.5 .034 6.0 
ALLGE2!3)||"Pastuneserasse 22 sss | 4 miles N., Lost .041 ok 020 3.5 
Creek. 
ANOS IGG AOS aoa ae Abmiles Nibeeoes | .028 4.9 .014 DE5 
ATTSS eo VClOVerseneia to Sees Eee ATO rena renee | 054 9.5 .028 4.9 
AVGSS2 | RAN Seve LaSse == eee (med 8c (OKO Eee as ay } . 090 15.8 .020 3.5 
4120____| Alfalfa and clover (just | 43 miles NE_--_-- 054 95 .020 3.9 
cut). 
Zs S|) laksol 10) 0) Co ee 5 miles NE_____- .035 9.6 .028 4.9 
AL 2N ROM OPON ASS! © = See ee | Ree] ee eee .090 15.8 .069 12ok 
AND IES Salle Soe COE 4 an Sree 6 miles NE___-_-_- . 104 18.2 .041 a2, 
ANP 2 aos COME elie. 1 es eee | 8 miles NE____-- .055 9.6 .028 4.9 
AN eee | ANT fee fg cer a 10 miles NE___-- .070 1283 .042 7.4 
IDA oN) LRG COD sas ee ee a Vinita eee . 069 12.1 041 Ue 
Ai 2eecn ES UIT Cheer alS Gaus eee Se leSwhy eee .042 7.4 . 020 Bro 
ANITIQE |) DOG eerie ee Gina To Be .055 9.6 .041 aw 
Ze ee leiy, Cae aa eae ee ee Jats Gotan Lees 041 ho .028 4.9 
IDR |) ROE EPA | 4 miles W__----- .055 9.6 .028 4.9 
AtiSaara| MB UMehy araSSae a ee | 63 miles W___--- .055 9.6 -028 4.9 
4 Supposed to have killed cattle. 
From 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 
