220 



HEREDITY AND ENVIRONMENT 



Fig. 47. Scheme to illustrate Galton's "Law of Filial Re- 

 gression" as shown in the stature of parents and children. 

 The mean height of all parents is shown by the dotted line 

 between 68 and 69 inches. The circles through which the 

 diagonal line runs represent the heights of graded groups of 

 parents and the arrow heads indicate the average heights of 

 their children. The offspring of undersized parents are taller 

 and of oversized parents are shorter than their respective 

 parents. (From Walter.) 



