26o A STUDY OF HEREDITY IN INSANITY [Oct. 



half the children will be neuropathic and half will be normal but 

 capable of transmitting the neuropathic make-up to their progeny. 



c. One parent being normal and of pure normal ancestry and 

 the other parent being neuropathic, all the children will be normal 

 but capable of transmitting the neuropathic make-up to their 

 progeny. 



d. Both parents being normal, but each with the neuropathic 

 taint from one grandparent, one-fourth of the children will be 

 normal and not capable of transmitting the neuropathic make-up 

 to their progeny, one-half will be normal but capable of trans- 

 mitting the neuropathic make-up, and the remaining one-fourth 

 will be neuropathic. 



e. Both parents being normal, one of pure normal ancestry and 

 the other with the neuropathic taint from one grandparent, all 

 the children will be normal, half of them will be capable, and 

 half not capable of transmitting the neuropathic make-up to their 

 progeny. 



f. Both parents being normal and of pure normal ancestry, ail 

 the children will be normal and not capable of transmitting the 

 neuropathic make-up to their progeny. 



2. Various clinical neuropathic manifestations bear to one an- 

 other the relationship of traits of various degrees of recessive- 

 ness; in a most marked way recoverable psychoses, though re- 

 cessive as compared with the normal condition, are dominant 

 over epilepsy and allied disorders. 



3. Various other clinical neuropathic manifestations bear to 

 one another the relationship of neuropathic equivalents ; that is to 

 say, they are conditions of the same degree of recessiveness vary-^ 

 ing in their clinical manifestations with the personality of the 

 subject, environmental conditions, etc. 



4. All the neuropathic children which result from a mating of 

 the fourth type (both parents normal, but each with the neuro- 

 pathic taint from one grandparent) can have theoretically only 

 equivalent defects and not defects of different degrees of re- 

 cessiveness. 



5. Among the actual results from such matings the following 

 have been met with : 



a. Brothers and sisters suffering from clinically identical neuro- 

 pathic manifestations. 



