Growth and variation in maize. 



149 



15. 

 C. 



deviation of each plant in Series C arranged accord- 

 quintile classes. 



tile classes. 



It will be noted at once that these distributions present certain 

 rather remarkable peculiarities. Thus for example in series B the plants 

 are distributed very nearly equally in each of the five classes. In 

 series A and C there is a more or less pronounced mode falling in the 

 middle class. However even in these series there is a marked tendency 

 for the distribution to spread out, so that the end classes are only 

 slightly smaller than the mode. These facts can best be seen from the 

 standard deviations, and for this purpose the standard deviation has 

 been given in table 16 in class units as well as in quintiles, i. e., after 



