284 FUMIGATION METHODS 
raised about eighteen inches 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 sizefrom a hen’segg toone’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 asmall 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. 
