10 THE DETERIORATION OF CORN IN STORAGE. 



tent was reduced from 18.3 per cent to 14.57 per cent, a reduction of 

 3.73 per cent, which is equivalent to a loss in weight of 4.44 percent. 



After this corn was dried and thoroughly cooled, 900 bushels, having 

 an average moisture content of 14.57 per cent, were loaded into car 

 No. 67031 as if intended for shipment. The car was run out into the 

 yard and left standing on the track fully exposed to all atmospheric 

 changes. The temperature of this corn immediately after it was 

 loaded into the car, after drying and cooling, on April 27, varied from 

 57 ° to 58 ° F. Frequent temperature readings were made up to and 

 including May 25, when the highest temperature at any ])oint in the 

 corn was 66° F., an increase of only 8 or 9 degrees, although the 

 temperature of the air in the car had varied from 56° to 82° F. 

 and the temperature of the air outside of the car from 41° to 90° F. 

 On May 25, after being in the car 28 days without any noticeable 

 change in condition, the corn was unloaded, elevated, and weighed, 

 and then returned to the car and left an additional 9 days on the 

 track. The air temperature at this time was 73 ° F. , resulting in a very 

 slight increase in the temperature of the corn by the time it was 

 returned to the car. 



On June 3 the temperature of the corn was 67° F., an increase of 

 only 10 degrees during the entire 37 days that this corn was in the 

 car. The condition of the corn was fully as good if not better than 

 when it was placed in the car on April 27, although the odor resulting 

 from the fermentation of the corn while in the bin had not entirely 

 disappeared. 



On June 3 the moisture content of the corn on the surface was 13.1 

 per cent, with 14.48 per cent for the remainder of the corn in the car, 

 a difference of 1.38 per cent in the moisture content, which is equiva- 

 lent to a shrinkage in weight in the surface corn of 1.59 per cent in 9 

 days from May 25 to June 3. 



UNDRIED CORN FROM BIN STORED IN CAR. 



In order to secure data for comparison, 900 bushels of the best cool 

 corn from the bin, principally the Illinois corn from the eighth and 

 ninth drafts, were loaded into car No. 75197 and placed on the track 

 alongside of the car containing the 900 bushels of dried damaged corn 

 from the top of the bin. The temperature of this corn while still in 

 the bin varied from 40° to 42° F., but in "running" from the bin, 

 elevating to the scale, and loading into the car, the temperature 

 was increased so that the temperature of the corn after being loaded 

 was 48° F. The air temperature at this time was 51 ° F. and the rela- 

 tive humidity of the atmosphere 76 per cent. The average moisture 

 content of this car of corn was 17.5 per cent, and the weight per 

 bushel was 55.3 pounds. 



[Cir. 4:^] 



