1^8 



THEORY OF EVOLUTION 



according to their weights, and those between 

 certain weights put into cyhnders, the cyhn- 

 ders, when arranged according to the size of the 

 beans, will appear as shown in figure 72. An 

 imaginary line running over the tops of the 



I 



Fig. 72. Beans put into cylindrical jars according to the 

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

 contained bea4il. (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. 



