DUST CONTROL IX GRAIN ELEVATORS 
the boot 
gives too 
great a 
chance for 
the removal 
by suction 
of the grain 
and heavy 
dust parti- 
cles. The 
most satis- 
factory point 
is at the boot 
opening or 
on the top of 
the boot. 
A satisfac- 
tory method 
of caring for 
dust within 
a boot is to 
place a hood 
between the 
legs (fig. 7). 
This installa- 
tion removes 
the air re- 
Spout 
Fig. 6.— Direct suction connection to elevator boot 
Fig. 7.— Application of suction between legs of elevator 
">°— 28 2 
placed by the 
grain, espec- 
ially when the 
grain is being 
fed into the 
back leg or side 
of the boot. 
For spouting 
connections to 
boots, this sys- 
tem is satisfac- 
tory. At this 
point grain can 
not be lifted, 
even when 
there is a choke- 
up in the boot. 
Feeding a 
boot through a 
floor grating, 
by either a 
tripper or an 
open spout, 
presents a diffi- 
cult problem in 
controlling the 
dust cloud 
