14 
headed bolts running through the board, as shown at BB, the bolts 
being 1-inch or g-inch. The bristles on-the sides CC should be ¢-inch 
long, but those at D should be longer, so that a good brushing to the 
outer side of the elevator may be secured. Such a brush can be made 
to fit any size of elevator. As it has been in use for many years 
and is still advised by the American Miller to correspondents, it is 
necessarily of value, and something similar should be used in every 
mill. . 
Cleaning by suction —For a long time the writer has been endeavor- 
ing to ascertain if millers have tried the system of vacuum cleaning 
advertised in our monthly magazines, and has just received word from 
one of these companies to the effect that it has only recently taken up 
flour-mill work. The com- 
pany, however, is satisfied, 
beyond any question of a 
doubt, that their system 
will clean a flour mill more 
cheaply than can be done 
by any other process. Con- 
siderable experimental 
work is being done in some 
of the principal mills at 
Minneapolis, and in one of 
these a plant was installed 
some time ago. The diffi- 
culty in this case is that 
the steam pressure is not 
sufficient to work one of the 
Fig. 4. ~ Elevator and belt brush, for cleaning elevators aspirator systems, and this 
infested by the Mediterranean flour moth. : 3 5 
matter is now being inves- 
tigated with a view to changing the plant to another mill where suit- 
able conditions can be obtained. 
) 
METHOD OF ‘‘STRINGING’’ A BUILDING FOR FUMIGATION. 
While the ‘‘stringing”’ method of fumigating mills and other large 
buildings is scarcely necessary, there are some persons who may wish 
information in regard to it. The strings are arranged so as to hang 
directly over each-generator, and are carried through screw eyes in 
the ceiling or woodwork to doors or stairways leading out of the 
room to be treated. The screw eyes should be firmly secured, and 
the best quality of cord of the proper size should be employed. 
The bags containing the cyanid of potash are suspended directly 
over the vessels, preferably after the acid is added to the water in the 
(Cire) 
