COLORING CITRUS FRUIT IN FLORIDA 9 
rooms, which has already been mentioned, is the placing of the 
stoves in buildings at some distance from the coloring rooms and 
forcing the gas through a conduit by means of an exhaust fan >A 
number of determinations were made on the effect of passing the 
gas through conduits both above and below ground. It was found 
also that the air in the coloring 
room could be cooled by passing Water Supply 
the gas over wet cloths or by 
dropping water into the conduit 
or into the fan used for forcing 
the gas into the room. This ad- 
dition of water also raised the 
humidity of the gas which was 
_ forced into the room. The appa- 
ratus devised for dropping the 
water either on the fan itself or 
in the current of gas, shown in 
62 — 
Figure 3, consists of a glass tube, —* ( SS 
similar to a gauge glass, fitted d. Roa } 
with a valve to regulate the rate Gas from ee a 
of flow, through which water Generating Room 
passes drop by drop into the con- To Coloring Room 
duit. If the water is run into the 
pipe after it leaves the fan, it will ""* “into the intake of the exhaust fan 
be necessary to have a sufficient 
head to force it in against the pressure. This need not be over 2 feet, 
however, as low-pressure fans are used for this purpose. If the water 
is applied on the suction side of the fan, it is broken up into very 
small drops in passing through and is readily evaporated. The 
keeping of a little 
water in the pipe, so 
that the warm gas 
passes over the moist 
surface, is also of 
value in cooling the 
gas and raising the 
| humidity. The results 
| of some of the experi- 
ke 
| 
Te 
if 
TEMPE RATURE— DEG. 
HUMIOITY— PER CEN 
mental work on cool- 
ing the gas while con- 
ducting it from the 
l2 &¢ 8 12 4% 8 /2 4% 8 /2 & 8° 
Dy eae al ihe Acai tend oc Aa te una 
INSIDE TEMPERATURE ~---—---—-— 
YNSGE HRD Ey | Se NS gas room to the color- 
OUTSIDE TEMPERATURE 
eC IS ial hed Gig Aaa ing room are shown in 
Table 1. 
ee eee Tt is evident from 
ping ater te the fan intake as compared with out- "[Tgble 1 that passing: 
the gas through a gal- 
vanized-iron pipe which is exposed to the sun or to temperatures 
about the same as those in the gas room does not cool the gas ap- 
preciably; but if the pipe is long and carried under a building 
where the temperature is uniformly cooler than that of the gas, 
some of the heat is conducted away. In cases where the pipe is 
buried underground, the temperature of the gas is reduced in pass- 
58253—26——2 
