SHRINKAGE OF SHELLED CORN IN CARS IN TRANSIT. 19 
In the fourth experiment the temperature of all the corn at the 
time of loading, May 11, 1911, was 21.2 degrees higher than the tem- 
perature of the corn in the third experiment, being 61.2° and ranging 
from 60.7° in the corn in transit to 61.6° F. in the corn on the track. 
From figure 5 it will be seen that during the fourth experiment the 
air temperature at western points was always lower than the. air 
temperature at Baltimore; thus, the corn in the four cars on the 
track showed an average temperature of 99.6° at the end of the 
experiment, as against an average of 90.6° F. for the corn in the four 
cars in transit. The average loss in weight of the corn in transit was 
0.50 of 1 per cent, and of the corn held on the track 0.73 of 1 per cent. 
In the first experiment, conducted from April 14 to May 11, 1910, 
no duplicate cars were held on the track at Baltimore. The average 
loss in weight of the corn in the five cars in this experiment was 1.01 
per cent. The average temperature of the corn at the time of loading 
was 55° ¥., or 6.2 degrees lower than the average temperature of the 
corn used in the fourth experiment, May 11, 1911. The fact that 
the corn in the first experiment showed a greater shrinkage than the 
corn in the experiment conducted from May 11 to June 1-8, 1911, 
when the average temperature of the corn and the average of the 
mean daily air temperatures were considerably higher, is explained 
by the fact that the corn in the first experiment showed an average 
moisture content of 18.1 per cent as against 16.7 per cent for the corn 
in the fourth experiment. The corn was also stored in the cars for 
five days longer; therefore, the difference in moisture and the differ- 
ence in the number of days that the corn was contained in the cars 
caused a larger percentage of shrinkage in the corn that was in 
transit from April 14 te May 11, 1910, than was found in the experi- 
ment conducted from May 11 to June 1-3, 1911. 
Figure 6 also shows that the average moisture content of the corn 
in the shipment made on December 24, 1910, was 17.9 per cent. The 
number of days the corn was contained in the cars was 27. The ship- 
ment made March 2, 1911, contained corn with an average moisture 
content of 18.8 per cent. This corn was also stored in the cars for 
97 days. The average moisture content of the corn in the shipment 
of April 14, 1910, was 18.1 per cent, the duration of this test being 
likewise 27 days. However, as corn with a higher moisture content 
deteriorates very rapidly during the spring months, when the weather 
is generally warm, corn with a moisture content of 16.7 per cent was 
selected for the shipment of May 11, 1911, and the time was reduced 
from 27 to 22 days. Even in this experiment, as shown in figure 5, 
the corn in two of the cars was hot and very badly damaged, while 
the corn in four of the remaining six cars had begun te heat before 
unloading. 
