BULLETIN 102, U. S. DEPARTMENT OF AGRICULTURE. 



heat. The curve designated "cob rot plus heat damage" (broken 

 Hue) represents the percentage of the total of the damaged kernels. 

 The curves show that the samples which were found by analysis 

 to have a large percentage of damaged kernels were also found to 

 have a high degree of acidity. It is shown further that the degree 

 of acidity varies directly with the percentage of damaged kernels 

 and that the presence of heat-damaged kernels in any large amount 



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Fig. 15— Curves showing the relation of damaged kernels to the degree of acidity found in samples of 

 corn (all grades) representing 2,454 cars received at a principal terminal market (C) from December, 

 1011, to May, 1913, inclusive. 



greatly increases the degree cf acidity. When the percentage cf 

 heat-damaged kernels was small, the degree of acidity was only 

 slightly increased. A break occurs in the continuity of the curves 

 representing the percentages of damaged kernels at acidity ranges 

 between 27.1 and 31 c. c. This break shows that a number of the 

 samples, although having a slightly higher degree of acidity than 

 certain other samples, contained a smaller percentage of damaged 



