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6 BULLETIN 48, U. S. DEPARTMENT. OF AGRICULTURE. 
The corn in car No. 2 did not show any appreciable increase in 
temperature until May 4, at which time the temperature of the corn 
was 61° F., an increase of 7 degrees over the record of the previous 
day. This increase in temperature was probably influenced to some 
extent by the air temperature, the mean daily air temperature having 
increased from 52° on May 2 to 62° F. on May 3. The tempera- 
ture of the corn in this car at the end of the experiment on May 11 
was 84° F. In a few more days it would undoubtedly have been hot 
and sour. 3 
The corn in car No. 3 did not show any great variation in tempera- 
ture until May 6, at which time the average temperature of the 
corn was 60°, as compared with 54° F. at the begining of the 
experiment. At the termination of the experiment, when car No. 3 
was unloaded the average temperature of the corn in that car was 
82.5°, as compared with an average of 84° F. fer the corn in ear 
No. 2. The corn containing 17.4 per cent of meisture in car No, 4 
and the artificially dried corn in car No. 5, containing 16.7 per cent 
of moisture, did not show any marked increase in temperature 
throughout this experiment. 
It will be noticed that the temperature of the corn in the cars was 
influenced to a limited extent by the temperature of the atmosphere; 
that is, when there was a sudden drop in the temperature of the 
air, as on May 5, the corn also decreased slightly in temperature, 
except the cars of corn that had begun to deteriorate. The heat 
generated during the process of deterioration of the corn concealed 
any influence exerted by the temperature of the air. 
SECOND EXPERIMENT, DECEMBER 24, 1910, TO JANUARY 20, 1911. 
CORN LOADED INTO CARS. 
On December 24, 1910, four lots of corn, each lot consisting of 
approximately 2,400 bushels, were selected at the elevators of the 
Pennsylvania Railroad Co., at Baltimere, Md. The corn was 
selected according to moisture content, and each of the four lots 
was first thoroughly mixed in the elevator before loading into 
cars. Two cars were loaded from each lot, one being forwarded 
from Baltimore to Chicago and return, over the Pennsylvania lines 
via the Fort Wayne route, while the duplicate car of each lot was 
held on the track in the Canton yards at Baltimore. Eight cars 
consequently were included in the experiment, in order to study 
the effect of atmospheric conditions on the shrinkage in weight and 
rate of deterioration. The cars held on the track at Baltimore were 
weighed, and temperature records were taken on the same days that 
