55 
be impossible to make any flour that could be used for bread- 
making uutil all the acid deposited should have been absorbed 
and carried away, which would result in enormous waste of ma¬ 
terial. I find, however, that the acid could be neutralized to a 
great extent by ammonia, and this, or some other equally power¬ 
ful agent, would have to be used before turning the mdl on to 
making flour again after the application of the gas.” . 
In dealing with the Mediterranean flour moth eternal vigilance 
should be the order of the day, and if the above methods are 
faithfully employed, I think that we shall, in a few years, lieai 
little or nothing about the insect in the mills of this country. 
MISCELLANEOUS EXPEDIENTS. 
Many ineffective expedients have been resorted to in the war¬ 
fare with the flour moth, but they deserve only passing notice, 
and are mentioned here mainly for the benefit of experimenters. 
Kerosene .—We have used this substance for washing walls, ap¬ 
paratus, and the inside of machines, but find it slow and tedious, 
and I would suggest its use only in extreme cases, where it is 
necessary to take a machine or other piece of apparatus apart. 
Solution of Soda and Water.—A strong solution of soda and 
water has been used to good advantage for washing the inside ot 
machines, and is very effectual in destroying larvae when it comes 
in actual contact with them. 
Soap and Lime.—A mixture of soft lye-soap and lime has 
been used for washing elevators and bolting-reels. This, like 
the above washes, is used mainly for cleansing the machines, and 
is of very little value unless the washing is kept up at legular 
and frequent intervals. , 
Buhach .—This substance(also. called pyrethrum, insect-powder, 
etc.) was burned in a single mill with slight success. It is not 
as effective as bisulphide of carbon or sulphur fumes, and is more 
expensive. Mr. Danysz has given quite a lengthy account of his 
experimental work with this substance in his papei. 
Ammonia .—Ammonia has been tried without success. 
Hydrocyanic Gas— I have some hopes from the use of hydro¬ 
cyanic gas, but have not carried my experiments far enough to be 
certain of its safety or of the feasibility of its application in mills. 
Corrosive Sublimate .—A solution of this substance has been 
used in mills for spraying walls, floors, and ceilings, but on ac¬ 
count of its poisonous nature I would not recommend it. 
Lime .—Very many millers after thoroughly cleaning and then 
whitewashing their mills have found that the pest was more easily 
kept in check. If the ceilings and walls of the mill are not tight, 
I would suggest that a little glue be added to the whitewash be¬ 
fore being applied. Various methods have been used foi apply¬ 
ing this substance. Sime paint the ceilings, walls, and. floois, 
using a brush; while others use a pump and sprayer, forcing the 
lime into every crack and crevice. Ordinary whitewash, as com¬ 
monly used, rubs off easily and often becomes a souice of annoy- 
