284 FUMIGATION METHODS 



raised about eighteen tnches above the ground, with a 

 driveway between. The earth underneath was com- 

 pletely honeycombed with burrows. Two pounds of 

 carbon bisulphid were secured. Wads of cotton, vary- 

 ing in size from a hen's egg to one's fist, were saturated 

 and thrust into every burrow that opened on the sur- 

 face. The holes were securely closed. Only in two 

 instances were the holes opened by their occupants, 

 and these were quickly destroyed by a second dose. 

 Wherever a burrow is found about any building it can 

 be treated in the same way. 



In fields where rats and mice frequently do serious 

 injury to corn and other grain in shock they can be de- 

 stroyed by saturating a small wad of corn-silk or husks 

 and pushing them in the holes after the shock has been 

 overturned. Frequently cellars and root-houses are 

 infested with rats. A few ounces of carbon bisulphid 

 used as indicated will exterminate them. 



How carbon bisulphid is put up. This material is 

 usually put up in steel drums holding fifty pounds 

 each and costs about ten cents a pound. It can be 

 purchased from local dealers in smaller quantities. In 

 such cases the price is about double that quoted, or 

 even more. The grade known as Fuma carbon bisul- 

 phid is cheaper than the chemically pure article. Only 

 in rare cases is it necessary to use the pure bisulphid. 

 For general insecticide purposes ' ' Fuma ' ' is the 

 standard and entirely satisfactory. The writer has 

 used large quantities of it with most excellent results 

 in every case. 



