Jtme ii, 1917 
Toxicity of Benzene Derivatives to Insects 
379 
LI 
12 
It 
10 
9 
8 
7 
6 
5 
4 
3 
2 
Fig, 4.—Graph showing the quantity of the benzene derivatives necessary to saturate 1,000 cubic feet 
of space at 70° F. and the time required by such quantity to kill house flies. Carbon bisulphid at the 
standard rate is given for comparison. 
