Inheritance of Physical and Mental jyaits 



283 



occur in fraternities with feeble-mindedness, or have feeble- 

 minded parents (Fig. 94). The test of the mental condition 



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of relatives is one that may well be 

 applied by judges in deciding upon 

 the responsibility of an aggressor. It 

 is to be hoped that the conservatism 

 of the law upon this matter may be 

 speedily overcome. 



Not only the condition of imper- 

 fect mental development, but also 

 that of inability to withstand stress 

 upon the nervous system, may be 

 inherited. From the studies of Dr. 

 Rosanoff and his collaborators, it ap- 

 pears that if both parents be subject 

 to manic depressive insanity or to 

 dementia precox, all children will be 

 neuropathic also (Fig. 95); that if 

 one parent be affected and come from a weak strain, half 



anenceph. 



Fig. 93. — ^The pedigree 

 of a family in whose second 

 generation incest produces 

 an epileptic daughter, but 

 by whose own father she 

 has one epileptic and two 

 feeble-minded children; A, 

 alcoholic; C, criminalistic; 

 E, epileptic; F, feeble- 

 minded; Sx, licentious. 



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Fig. 94. — Pedigree of a feeble-minded familj- in which criminalistic (C) and 

 licentious (Sx) traits also appear. 



