FUMIGATION WITH CARBON BISULPHID yal 
elevator legs, machines, and other places where the 
pests usually congregate in great numbers. Spraying 
or throwing the liquid broadcast into badly infested 
corners, on machines, and other pieces of apparatus 
where the pests are particularly abundant, has been 
attended with very good results. 
Time to do the work.—Saturday afternoon is the best 
time for fumigating a mill or large building. After 
sweeping from top to bottom, all firesabout the premises 
should be extinguished and the building closed as 
tightly as possible. The vessels and cotton-waste 
should be previously distributed, so there will be no 
unnecessary delay. The number and distribution of 
the vessels will depend, as already stated, upon the con- 
dition of the mill and the severity of the attack. It is 
best to begin with the lowest story and work upward. 
The operators can then keep above the settling gas. 
When the bisulphid has been applied throughout the 
mill it should be locked and kept closed until the fol- 
lowing Monday morning. All windows and doors 
should then be thrown wide open and the building 
allowed to air an hour or more before fire is started in 
it. Where the building is large anda great quantity 
of material has been used, it is wise to have a watch- 
man stationed outside to prevent any one from entering 
or loitering about the building during fumigation. 
Prattical application.—As a guide to those who may 
use this method, I quote several letters from practical 
millers who have used carbon bisulphid successfully. 
The superintendent of a large Pennsylvania milling 
company, whose name I withhold by request, wrote me 
