VIRILE SENTIMENT 93 



A possible Mendelian prediction for such a case 

 is that four kinds of individuals will be present in 

 the offspring. We may state them in the following 

 manner : 



1. Suffering from tubercular taint and nervous 



lesion. 



2. Suffering from tubercular taint, but no nervous 



lesion. 



3. Suffering from nervous lesion, but no tuber- 



cular taint. 



4. Normal in both features. 



And the proportions in which these four types may 

 be expected are, in the order in which they are given : 

 9+3+3+1. That is, in a family of sixteen indi- 

 viduals, only one normal person is expected ! And 

 his normality will not be better than the normality of 

 his race. In this family of ten only one is normal ; 

 the others all indicate some nervous lesion, or mani- 

 fest both a tubercular condition and a nervous lesion. 

 And thus far this case shows a resemblance to a 

 Mendelian mode of inheritance. There is segregation 

 manifested in the case of the normal son, in the pro- 

 duction of individuals showing only nervous symp- 

 toms without tubercular ones, and in the appearance 

 of both tubercular and nervous pathological features 

 together in other individuals. But in a complex 

 case of this kind many factors must be considered, 

 and a larger number of families examined, before any 

 degree of positive statement is justifiable. It is 

 sufficient for the present that there is some indication 

 of a Mendelian mode of inheritance, and that in other 



