INSECTS AFFKCTIXG CEREALS, ETC. 131 



the bisulphide is evai)orate(l at the rate of a i)()un(l to every 1,000 feet 

 of cubic space. 



The vapor of this clieniical is deadly to all animal life, but there is 

 no danger in inhaling a small (piantity, and although it has a powerful 

 and disagieeable odor, this soon passes away without any after effects 

 and without harming for food such material as it may be used upon. 

 The vapor is also inflammable, but if no fire, as, for example, a lighted 

 cigar, be brought into the immediate vicinity until the fumes have 

 entirely disappeared, no trouble will be experienced. 



Bisulphide of carbon costs, at retail, from 20 to 30 cents a i)ound; at 

 wholesale, in 50-pound cans, 10 cents a pound. 



