450 



Journal of Agricultural Research 



Vol. XIX. No. 9 



The nitrogen, ash, and water were determined in all samples. Inas- 

 much as the glumes were removed, the difference between the total of 

 these substances and the dry weight would approximate the sum of the 

 carbohydrates and fats. This calculation has not been made. Its trend 

 would be similar to that of the dry weight. The results of the analyses 



N o. 



a 



^ I 



<V| 'C 



*^ 2 



^ I 



^ E 



^ i 



CO & 



<0\ I 



^ 





are given in Table III. The cause of the addition or loss of each sub- 

 stance determined is evident in the tables. Comparisons, however, are 

 much more easily made in figures 3, 4, 5, and 6. 



The graph of the dry weight is quite similar to that of the wet weight. 

 In each case there is a marked reduction of the rate of growth of the 

 kernels from clipped spikes in the latter half of the period of growth. 



