SHRINKAGE OF SHELLED CORN" IN CARS IN TRANSIT. 



15 



Table VIII. — Weight of corn in each car immediately after loading on May 11, 

 1911, and the shrinkage, or loss in weight, together with the moisture content 

 at time of loading and the average temperature of corn at time of loading 

 and unloading . 



Lot 



Car designation and movement. 



Moisture 

 content 

 of com 

 when 

 loaded. 



Net corn 

 in car 

 when 



loaded. 



Shrinkage, or loss 

 in weight. 



Average tempera- 

 ture of corn when — 



No. 



Pounds. 



Percent. 



Loaded. 



Un- 

 loaded. 





(Car 1-C, transit, Baltimore to Chi- 



Per cent. 

 !■ 18.2 



[ 17.8 



I 16.9 



I 13.9 



Pounds. 

 j 69,850 



1 69, 470 



f 69,910 



1 68,750 



f 56,060 



1 55, 700 



f 65,890 



1 63,430 



850 



1,110 



210 



370 



220 



320 



40 



70 



1. 23 

 1.60 

 .30 

 .55 

 .39 

 .59 

 .06 

 .11 



°F. 

 61.7 

 64.2 

 58.7 

 60.0 

 61.0 

 G1.8 

 61.3 

 62.5 



°F. 

 121.2 



1 



|Car 1-B, held on track in Balti- 



129.0 





(Car 2-C, transit, Baltimore to Chi- 



S2.8 



2 



iCar 2-B, held on track in Balti- 



95.7 





fCar 3-C, transit, Baltimore to Chi- 



S5.7 



3 



]Car 3-B, held on track in Baiti- 



100.2 





[Car -1-C, transit, Baltimore to Chi- 



72.5 



4 



ICar^B, held on track in Balti- 



73. 3 









From Table VIII and figure 5 it will be seen that the shrinkage in 

 weight was much greater in the cars of corn that were held on the 

 track at Baltimore than in those in transit. The mean daily air tem- 

 perature through which the cars passed while en route, as shown in 

 figure 5, was considerably less than the mean daily air temperature 

 that surrounded the cars at Baltimore. This caused the temperature 

 of the corn in the cars on the track at Baltimore to increase faster 

 than that of the corn in transit, in that the higher air temperature 

 not only warmed the corn, but also offered much more favorable con- 

 ditions for the development of molds and bacteria and for the action 

 of enzyms or other unorganized ferments; consequently, the natural 

 shrinkage in the weight of the corn held at Baltimore was greater 

 than that of the corn in transit. 



The shrinkage in weight of the car of corn in transit representing 

 lot No. 1, containing 18.2 per cent of moisture, was 1.23 per cent, 

 while the duplicate car that remained on the track at Baltimore lost 

 1.6 per cent. The heavy losses occurring in these two cars were di- 

 rectly due to the deterioration of the corn. As may be seen in figure 

 5. on May 20 the average temperature of the corn from lot jSTo. 1 

 was 79.5° in the car held on the track at Baltimore and 75.3° in the 

 car in transit. From May 20 until June 1 the temperature of the 

 corn increased rapidly, and on the latter date the car of corn held at 

 Baltimore showed a temperature of 129°, while the corn that had 

 been shipped from Baltimore to Chicago and return showed an aver- 

 age temperature of 121.2°. The corn in these two cars was in a 

 very badly damaged condition when unloaded, on June 1. 



