THE DETERTORATIOX OF COEX TX STORAGE. 



11 



On May 20, after standinfj on the track 23 days, the corn in this car 

 began to show unmistakable si<z;ns of deterioration. At that time the 

 maximum temperature of the corn was 75° F., and it had a distinctly 

 sour and musty odor. Five days later the maximum temperature 

 was 122° F. in the brake end of the car, a])proximately 6 inches below 

 the surface of the corn. The average weight per bushel had decreased 

 from 55.3 ])ounds to 52.6 pounds. The moisture content varied from 

 13. G per cent in the corn at the surface to 17.5 ])er cent where the 

 temperature was 122° F., as compared with a variation of from 17 per 

 cent to 17.7 per cent at the time the corn was loaded into the car. 



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Fig. 3.— Diagram showing the temperature of the undried com in ear No. 75197 and of the dried damaged 

 corn in car No. G7031; the dailj- maximum air te:ni)eratiire; and the weather record from April 27 to 

 June 3, 1909, while these cars were on the track in the Baltimore and Ohio elevator yards. 



On May 25 tliis corn was unloaded, weighed, handled over fiA'e eleva- 

 tors, reweighed, screened, weighed a third time, and returned to the 

 car for further observation. When the corn was returned to the car 

 the "second time (May 25) the temperature v\-as 73° F., approximately 

 the same as the temperature of the air at the time the corn was 

 handled. On June 3, 9 days later, the corn in this car was again hot, 

 the maximum temperature being 112° F., showing that hot corn is 

 not made safe for shipment when cooled sim])ly by handling. 



Figure 3 shows the changes in' temperature in both the car of 

 undried com and the car of dried damaged corn while on the track 



[Cir. 43] 



