148 



THEORY OF EVOLUTION 



according to their weights, and those between 

 certain weights j^ut into cylinders, the cjdin- 

 ders, when arranged according to the size of the 

 beans, will aj^pear as shown in fignre 72. An 

 iniaginaiy line running over the tops of the 



Fiu. 12. Beans jjut ijito cylindrical jars according to the 

 sizes of the beans. The jars arranged according to size of 

 contained beans. (After de Vries.) 



piles will give a curve (fig. 73) that corresponds 

 to the curve of probability ( fig. 74 ) . 



If we stand men in lines according to their 

 height (fig. 75) we get a similar arrangement. 



