270 FUMIGATION METHODS 



in the hole the box Js ready for use. In placing it 

 over a plant, be careful that the edges set firmly into 

 the dirt. Remove the stopper, add the desired amount 

 of liquid, and close it quickly. 



Fumigation of mills and other buildings. Carbon 

 bisulphid can be thrown directly upon grain without 

 injuring its edible qualities, and will not effect its vital- 

 ity in the least. In mills it can be used about the 

 machinery, spouts and elevators with perfect assurance 

 that the manufactured products will not be damaged. 

 I know of no instance where the slightest deleterious 

 effect has been realized by persons applying it in mills, 

 although they unavoidably inhale some of the fumes. 



The amount of liquid to be used depends ( i ) on the 

 size of the building, (2) on its tightness, and (3) on 

 the magnitude of the attack. Where the building is 

 reasonably tight and but slightly infested, one pound 

 of carbon bisulphid is sufficient for every thousand 

 cubic feet of air-space enclosed. If it is somewhat open 

 or badly infested the amount should be doubled. When 

 applied to bins containing stored grain, one pound of 

 liquid to every hundred bushels of grain is commonly 

 used ; but if the insects are very abundant, twice this 

 amount should be used. 



Methods of application. A number of ways for using 

 carbon bisulphid have been suggested and tested. The 

 most effective manner of applying it in mills consists in 

 simply pouring the liquid into shallow dishes, such as 

 soup-plates, pans, or wooden vessels, and distributing 

 them about the building. Bits of cotton-waste satu- 

 rated with the liquid should also be thrust into spouts, 



