16 BULLETIN 1159, U. S. DEPARTMENT OF AGRICULTURE. 
left, gate valves of suitable size are connected by 4-inch nipples. 
From each gate valve lines are run to one of the rooms, using 45° 
elbows wherever possible instead of ordinary 90° elbows, as the lat 
ter tend to increase back pressure on the engine. By locating the 
gate valves close together it is found more convenient to control the 
gas supply for each room. Between the engine and the group of — 
ralves just described it is advisable to locate another T, with an addi. 
tional gate valve connected into the side outlet and with a length of 
pipe leading to the outside for carrying off all or part of the exhaust — 
in case it is not required in the coloring rooms. Kerosene engines — 
should not be used for coloring, as experience has shown that this | 
type gives off smoke in the exhaust which will be deposited on the 
oranges. 
EQUIPMENT FOR COLORING WITH GAS FROM KEROSENE STOVES. : 
. . . . * . ry 
Because of fire risk it is not desirable to locate in the coloring house ~ 
the stove used for generating the gas. The most desirable arrange- 
2S 
FLOAT 8 ee a Py SS 7ANK NIPPLE 
LOCK NUTS 
=> Y 
FUEL TANK =i 
O/L. PIPE LINE INLE 7- 
GLOBE VALVES A 
GAS HOUSE OF #" CONCRETE FLOAT LALLYVE AND 
CON STANT LEVEL CHAM: 
STOP COCK 
FLOAT VALVE 
VEL TANNA 
5 ¢ eal METAL O1SK 
ip Hees 2) Ree eas ce og IRE STAPLES 
h ALL UL, 
LEE fra \ Ho 
CLEARAIVCE Nag AEN 
GLOBE LALLES 
CROSS SECTION OF GAS HOUWSE 
BURNER _ AND _LDWSKS 
Fic. 3.—Plan for a gas-generating house. 
ment is the system followed in California, where gas is generated in 
a separate fireproof building 40 to 80 feet distant from the coloring 
rooms. The gas from near the top of the generating house is drawn 
through a conduit and forced into the coloring rooms. A plan for 
such a gas-generating room, of concrete, is shown in Figure 3. A 
house built according to this plan will accommodate 12 or more burn- | 
ers, which will generate a maximum of gas to supply a 6-room color- 
ing plant. The stoves ordinarily used in these plants consist usually 
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