16 BULLETIN 1367, U. S. DEPARTMENT OF AGRICULTURE 
generating room should be constructed of fireproof materials and 
have a fireproof roof. A plan for such a generating room is shown © 
in Figure 9. 
If for some reason it is necessary for the stoves to be in the room 
with the fruit or in a pit or cellar under the coloring room, they | 
should be placed in a metal box (fig. 10) which has a removable lid 
that is suspended over the stove by a string. If the stove flares up 
the string is burned and the lid drops down with the edge in a little 
trough of water. The burning stove is thus inclosed in an air-tight 
metal box, which quickly smothers the fire. 
The gas-generating room should be at a distance of 60 feet at least 
from the coloring rooms or packing house. The conduit for con- 
ducting the gas from the generating room to the coloring room may ~ 
be of galvanized iron and should be at least 6 inches in diameter for 
a six-car coloring house. If the © 
small Cord pipe is buried, tile or iron — 
forcing the gas from the gen- 
erating room to the coloring © 
room should be of the exhaust — 
type, located outside the gen- — 
erating chamber. The intake 
pipe to the fan should open near 
the ceiling of the generating 
room, with a damper so ar- 
ranged that it will close auto- © 
matically if the stoves flare up 
and begin to give off smoke and 
soot. This can be accomplished 
by continuing the intake pipe 
through one oe eae ute in 
an ua ez. _1t a V-shaped notch which is 
a eeendedih aeacntine for inclosing an oil about the Aietnetee of the pipe 
Loe when it is placed in the room with at its widest part and extends 
almost through the pipe. A 
sheet-iron damper may then be hinged at the back of the pipe and 
so arranged that when dropped it closes the intake pipe to the fan 
and opens the pipe in the roof to allow the smoke to escape and 
when raised opens the intake pipe and closes the pipe through the 
roof. This damper is held in place by a small cord which passes 
over the stoves and is burned through when any of the burners 
flare up. Details of the arrangement of the burner and damper 
are shown in Figure 1. If the coloring room is tight, the pipe 
can enter at any convenient place and the opening arranged so 
that the gas, which at times may be hot, will not blow directly on 
the fruit. 
When a number of burners are used in one generating chamber, a 
supply tank and float valves (fig. 11) are advisable to keep a supply 
of fuel for the stoves at all times. When only a few burners are 
employed the ordinary inverted supply tank usually equipped with 
kerosene stoves may be used. A plan for the installation of burners 
and the general arrangement of the room is shown as Figure 9. 
should be used. The fan for © 
