INJURY TO CATTLE ABOUT ANACONDA. Z 
It is a matter of general knowledge that a large percentage of the 
sulphur in the ore is given off as sulphur dioxid in the usual smelter 
operations. If the ores given in Table IV are fairly representative 
samples of the material smelted at Anaconda, and if 8,000 tons of 
ore are handled each day, it will at once be seen that a tremendous 
quantity of sulphur dioxid is discharged into the atmosphere. Har- 
kins and Swain“ have studied the composition of the smelter smoke 
from the Washoe smelter and found that the average amount of 
sulphur dioxid and trioxid given off per day is 4,636,000 pounds and 
447,600 pounds, respectively. Unfortunately these authors do not 
give the composition and quantity of the ore smelted during the time 
that the experiments were made, so that it is impossible to calculate 
what percentage of the sulphur present in the original ore was dis- 
charged through the stack as sulphur dioxid and trioxid. 
INJURY TO CATTLE BY ARSENIC IN THE VICINITY OF THE 
WASHOE SMELTER. 
A claim made by the farmers, which required investigation, was 
that enough arsenic is given off from the smelter to settle on the sur- 
rounding forage crops and so poison the cattle. To determine this 
it is first necessary to show that the ores reduced at the smelter con- 
tain arsenic. Examinations of several samples of ore from mines 
which partly supply the smelter gave the following results: 
TABLE V.—Arsenic content of ore samples. 
: Name of mine furnish-| Metallic ae Name of mine furnish-| Metallic 
Serial No. ing ore. arsenic. Serial No. ing ore. arsenic. 
Per cent. | Per cent. 
4D DS eee cele ee Speculator____---- 289542 Clee Never Sweat_________- 0.45 
b ORB YO gk a a ee ea OR Dib5 WN COXA se Diamonds sa seen oie 
2 OAR ois pene ae Pano te. 2s 28 Be | a2 A eee eee leAnvacondans=_22 ea sana None. 
AIC) See a ae | Ee (0 (0) eee aecee lies oe 45 | 
If we reject the first saniple in Table V as exceptional and consider 
the other ores as representative of those received at the Washoe 
smelter, it will be seen that such ores contain 0.85 per cent of arsenic. 
At this rate, if 8,000 tons of ores per day are smelted, 68 tons of ar- 
senic enter the plant each day and, according to the officers of the 
smelter, only 2 tons of white arsenic are recovered daily. This, 
of course, does not mean 2 tons of metallic arsenic, but for conveni- 
ence in discussion, it will be considered as such. There remain, there- 
fore, 66 tons of arsenic to account for, which can only escape in a 
volatile form in the fumes, or be carried off in the tailings and slag. 
A determination of arsenic was made in two samples taken from the 
dump in which 0.11 and 0.07 per cent were found, or an average of 
@ J. Amer. Chem. Soc., 1907, 29: 970. 
