CHEMICAL CHANGES IN CALCIUM ARSENATE. hy * 
a Po ‘ 
eter es 
eos CE HE A CL 9 
20 as-g tence set 26t 
2.0 We eed 04‘ 
x 1.0 0.2 
O O 
Fig¢, 15.—BS-3 (25 poundsin paper-lined sugar barrel). 
cE A A 
hso| | sree oe Lede | tl 8 
9 GIR am Sl a A 
v2 068 
NE 04- 
Vso a2" 
Fia. 16.—BS-4 (25 pounds in hardwood barrel). 
