96 HEREDITY IN RELATION TO EUGENICS 



This pedigree contains 22 significant matings {i. e., that 

 yield more than one child). The products of these matings 

 are summarized in Table IX. 



Table IX 



PRODUCT OF VARIOUS MATINGS IN BARR^S PEDIGREE 



Neurotic X neurotic 

 Neurotic X neurotic 



Neurotic X epileptic 

 Neurotic X insane 

 Insane X normal 



Neurotic X normal 



Neurotic X unknown 



Normal X normal 



14, 17, 19, 21 16 



E, epileptic; F, feeble-minded; I, insane; N, normal; Ne, neurotic; X, un- 

 known. 



In Table IX there is no marriage of two insane persons. 

 Where a nervous person marries a neuropath, of 11 known 

 offspring 6 are normal and 5 neuropathic ; when two 

 neurotic marry, 2 out of 6 children are normal and 1 insane; 

 when an insane and a normal marry, of 13 children 4 are 

 normal and 2 insane; when a neurotic and a normal marry, 

 of 28 children 16 are normal, 9 nervous, 1 feeble-minded and 

 2 insane. Even some normal parents (of this strain) have 



