90 HEREDITY IN RELATION TO EUGENICS 



would take a violin lesson with him and spend the afternoon 

 in the PubUc Library which he much enjoyed but he would 

 slip away from her on the way home and be gone till mid- 

 night. He is an unconscionable liar. He contracts debts, 

 steals when he has no use for the articles stolen and has been 

 convicted for burglary. Much money and effort have been 

 spent on him in vain. His mother's father, (I, 3) (of whom he 

 has never heard) was a western desperado, drank hard and 

 was involved in a murder, but finally married a very good 



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Fig. 54 



woman (I, 4) and has 2 normal daughters in addition to this 

 boy's mother. 



The typical skipping of a generation, seen in these pedi- 

 grees of the wandering instinct, suggests that it is a recessive, 

 like most neuroses — and strengthens the probabiUty that it 

 is due to a real mental defect. 



The following case suggests the inheritance of an extremely 

 erotic instinct also as a defect (Fig. 55). 



A large, healthy man (II, 4) engaged in an engineering pro- 

 fession, has much ability in music and is an inventor. He 

 drinks very little alcohol, has always been a good worker and 

 is highly esteemed by those who employ him. But he is 



