47 



The classified data may be arranged graphically, in the following manner, 

 to show what the Bio metricians call "the frequency curve of variation in 

 the weight of kernels": 



' 



FIG. VIII. Frequency curve of variation in weight of kernels from different pure cultures 



(Author del.) 



The different types in the large table shown above are arranged accord- 

 ing to the per cent of plants in each which developed awns. This, it will be 

 noticed, varied from to 98% in the white kernelled sort and from to 27% 

 in the yellow. The character of the awns (finer or rougher) is measured by 

 the eye, (1) indicating a fine, weakly developed awn and (5) an awn which is 

 strong and twisted. 



The hairiness of the callus is also measured by the eye, (0) indicating 

 absence of hair, (1) slightly hairy and (2) heavily haired. 



The above analysis shows that scarcely any of the 72 plots produced 

 identical progeny but rather are they regarded as distinct hereditary types 

 which in respect to certain characters present a whole line of hereditary 

 gradations from one extreme to another. 



A point of prime importance revealed by these investigations is the Independent 

 independent nature of different characters. Thus the development of awns nature f 

 is quite independent of the development of hair on the callus; the length 

 of the kernel is in no way governed by its breadth : low growing forms as well 

 as high may have broad leaves or narrow leaves or they may have a stiff- 

 branched panicle or a panicle which is more lax and drooping etc. Each 



