FIG. 167. Diagram outlining history of Kallikak family 



Squares stand for males, circles for females; N for normal people, F for feeble- 

 minded. Five generations on the side of the feeble-minded girl contain 480 indi- 

 viduals 143 feeble-minded, 33 immoral, 24 drunkards, and 3 epileptics. On the 

 normal side are 496 descendants, none of whom are feeble-minded. After Goddard 



342 



