16 BULLETIN 48, U.*S. DEPARTMENT OF AGRICULTURE. 



In the second lot the loss in the weight of the corn shipped to Chi- 

 cago and returned to Baltimore was 0.3 of 1 per cent. There was no 

 appreciable increase in the temperature of this corn until May 25, 

 at which time the average temperature of the corn in the car on 

 the track at Baltimore was 71.3°. On June 1 the average tem- 

 perature had increased to 95.7°. The corn that was in transit to 

 Chicago showed an average of only 82.8° at the time of unloading, 

 on June 1. This corn was only slightly damaged. It had, however, 

 reached a point where the deterioration and the accompanying 

 shrinkage would have been very rapid within the next few days. 

 The car of corn from lot No. 3, containing an average moisture 

 content of 16.9 per cent, lost 0.39 of 1 per cent in transit, while the 

 loss on the same kind of corn in the duplicate car held on the track 

 at Baltimore was 0.59 of 1 per cent. This corn was not unloaded 

 until June 3, two days after the corn from the first and second lots 

 was unloaded. At the time of unloading, the temperature of the 

 corn in the car which was returned from Chicago was 85.7°, while 

 the temperature of the corn in the car that remained on the track 

 at Baltimore was 100.2°. As a result of the delay of two days in 

 the time of unloading, the shrinkage in lot No. 3, containing 16.9 

 per cent of moisture, was greater than the shrinkage in lot No. 2, 

 which contained 17.8 per cent of moisture. If the corn from lot 

 No. 3 had been unloaded on June 1, the loss in weight of the corn 

 that was shipped to Chicago would have been 0.29 of 1 per cent and 

 the duplicate car at Baltimore would have shown a loss of 0.44 of 1 

 per cent. The loss in weight for those two days was 60 pounds in 

 the car of corn returned from Chicago and 80 pounds for the car 

 on the track. The average temperature of the two cars of corn from 

 lot No. 3 on June 1 was also lower than the temperature of the two 

 ears of corn from lot No. 2. In this connection it is important to 

 note that the corn in lot No. 3 was fresh-shelled corn, while that in 

 lot No. 2 was shelled in November or December, 1910. This factor 

 had a considerable influence on the degree of deterioration and con- 

 sequently had an effect on the amount of shrinkage. The car of 

 corn from lot No. 4, containing 13.9 per cent of moisture, which 

 was shipped from Baltimore to Chicago and return, lost 0.06 of 1 

 per cent. The duplicate car from the same lot held on the track at 

 Baltimore lost 0.11 of 1 per cent. 



SHRINKAGE AS AFFECTED BY THE TEMPERATURE OF THE CORN. 



In all cases the temperature of the corn immediately after loading 

 into the cars was practically the same as the air temperature at the 

 time of loading. 



Table IX gives the total losses in weight of the corn in all the 

 cars in each experiment in transit, as compared witli the corn from 



