68 HEREDITY IN RELATION TO EUGENICS 



(nJ. 



<H) D 



(n)|n](n)(^[^ 



o 



e 



d 



El-r-© E— r-© 



<N)[N]©(^|tH-^(N)[Al(A)(A) 



1 TWIN6 



Fig, 32. — Pedigree chart illustrating the inheritance of feeble-mindednesa. 

 In chart A, the central mating is of an alcoholic man with a normal woman 

 who died of tuberculosis. Of their 11 children, 5 are known to be n9rma!, 

 the others died early. Then (B) this man married a feeble-minded woman 

 and of 7 children 3 are certainly feeble-minded, and 2 were, as young 

 children, killed at play, in a fashion indicating a lack of ability to avoid 

 ordinary dangers, Goddard, 1910. 



M y Q I El 



©-hSWSei 



AlSy Sy 



INF mr mr* 





Fig. 33. — Here a feeble-minded woman (of the first generation), has married 

 a normal man and has 4 normal children (except that 1 is alcohoUc); then 

 she marries an alcohoHc sex-offender (who is probably also feeble-minded) and 

 has 4 feeble-minded children. Here the mental strength of the first husband 

 brought the required strength into the combination, so as to give good children. 

 GODDABD, 1910. 



