54 
By these measures, with plenty of light, thorough cleanliness 
a cold mill, and caution in taking in stock and old hags, we hope 
to keep tree ot the pest which has occasioned us so much trouble 
and loss. 
One of my California correspondents, who is now using steam 
tor the destruction of this pest, says: “By the use of this sys¬ 
tem 1 am now keeping the flour moth in check, but I am com- 
pelled to go over the mill, from top to bottom, at least once a 
w , e< l,' 11 le . t ll 8° longer than that I observe a decided increase 
ot the moths m the mill and worms in the goods. On the whole 
I hud this the most efficacious method I have tried since the 
moths have been with us.” 
The most satisfactory method for equipping a mill with appa¬ 
ratus tor steaming purposes, now known to me, is that described 
on page 44, and used by a San Francisco miller. 
There are several points about this method of destroying in- 
sects that should be carefully considered. 
flour, or other manufactured product left in a 
mill during the steaming process is liable to become damp and 
seriously injured. All such material should therefore be removed 
before the steam is turned on. 
2. The bright parts of machinery and other apparatus are liable 
to become rusty if not wiped thoroughly dry immediately after 
the operation, or oiled before the steam is turned on. 
3. The “steam. sweeper” or steam introduced by means of a 
ho3e and nozzle, is certainly more advantageous than steam intro¬ 
duced through other pipes where the entire mill is filled at one 
time, as in the former case it can be directed into corners, spouts, 
machines, or other places where the attack is severest, with less 
liability to the injuries specified under 1 and 2. 
4. Steam can be used to best advantage during the summer 
months, as the wdndows and doors can be thrown open at this 
tune. ' In cold weather, or during the winter months, when the 
mill is tightly closed, the steam on the cloths of the purifiers 
often causes trouble, the middlings running the w r rong way. Steam 
sweeping, on the whole, is most successful in the summer months, 
. ^ “ii i some of the Southern States w'here there 
is a mild and equable temperature. 
Steam cmcl Sulphur. The use of steam and sulphur combined has 
een attended by \eiy satisfactory results. Aly California correspond¬ 
ent, after his bitter experience with the sulphur, writes again: “I 
think that theie is no d)ubt but that the moth can be extermi¬ 
nated from any one mill by sufficiently long-continued applica¬ 
tions of sulphur fumes and steam. This, however, necessi¬ 
tates a great expense in moving all the stock out of the mill, and 
also loss of tune that would result in shutting down the mill to 
make the application. I do not believe that all the eggs, larvae, 
pupae and adults could be destroyed in less than one week’s con¬ 
stant application of the gas and steam. This process would leave 
the mill in such a condition that unless the acid which is de¬ 
posited by the gas could be neutralized by some agent it would 
