Aug. 9, 1920 Development of Barley Kernels in Clipped Spikes 463 



The graphs of the growth in length essentially coincide for six days 

 after flowering. For some reason not apparent, the kernels in the normal 

 spikes reach a greater length than those of the clipped spikes. This 

 greater length is still in evidence at maturity. The difference is only X 



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Fig. 7. — Graph showing growth in length, lateral diameter, and dorsoventral diameter of kernels of Hann- 

 chen barley in normal and clipped spikes. 



mm., but it occurred in both Minnesota and Idaho. A part of the differ- 

 ence seems to have been due to the greater water content of the normal 

 kernels, for the graphs of kernel lengths approach each other again at 

 maturity. 



At Aberdeen, the course of the development of the lateral diameter is 

 much like that of the dorsoventral diameter. Seven or eight days after 



