STUDIES OF THE PINK BOLLWORM IN MEXICO 57 
Table 47. — Absorption of moisture by seed treated in live-steam machine 
Weight of seed- 
Time in 
machine 
Steam 
pres- 
Gain in 
weight 
Before After 
treat- treat- 
ment ment 
M. sec. 
Pounds 
Pounds Pounds 
Pounds 
Per cent 
1 5 
50 
1,137 1,172 
35 
3.08 
1 5 
50 
781 814 
33 
4.2 
55 
55 
782.8 
804 
21.2 
2.7 
55 
70 
846.6 
861.2 
14.6 
1.7 
In the first three tests steam was admitted into two sections of the 
conveyor, and in the last into only one. The temperatures recorded 
in these tests ranged from 144 to 150° F. It appears from the results 
/JV 
& *?■ £~ & 7* <3 & /& Ss J& /& A* /S- /& 
Fig. 13.— Cooling of seed treated with live steam and bulked immediately after treatment 
that the amount of moisture absorbed decreases when the time of 
actual subjection to steam is reduced, even though the steam pressure 
has to be increased to give sufficient heat. 
PRACTICAL USE OF DISINFECTING MACHINES 
Under the State regulations, disinfecting machines were installed 
at all the gins during 1922 in all of the regulated zones in Texas. 
Twenty-three of these machines were of the dry-heat type and 14 
of the live-steam type. Altogether about 23,000 tons of seed were 
treated. There were no interruptions and machines were found to 
be entirely practicable. 
Dry-heat machines costing about $500 each had a capacity in the 
larger size as high as 10 bushels per minute. Three horsepower was 
required to operate this machine. The expense of operation ranged 
from 10 to 25 cents per ton of seed. 
