374 Journal of Agricultural Research ( vot. ix, no. h 
RESULTS OF THE INVESTIGATION 
Inasmuch as carbon bisulphid is in general use as a fumigant, its 
toxicity was determined for comparison with the toxicity of the benzene 
derivatives. Figure i shows curves based upon different amounts of 
certain of the chemicals and the time required to kill with such quantities. 
Owing to the extended curves of some of the substances a graphical 
representation was not feasible. 
The data upon which the curves are based are given in Table I. 
Furfural is included for comparison with the aldehydes of benzene. Its 
relationship to benzenaldehyde is shown in the following formulas: 
HC 
HC 
\/ 
CH 
C—CHO 
O 
The results, given in millionths of a gram-molecule, are recorded in 
Table II and shown graphically in figure 2. 
Fig. a.*—Graph showing the millionths of a gram-molecule necessary to produce the death of five house 
flies in a i-liter flask at 70° F. in 400 minutes. 
