I9I2.] 



ANALYZED BY THE MENDELIAN METHOD. 



183 



to be classified, and 19 died before 14 years of age. Of the 55 clas- 

 sified, 29 were epileptic, 26 feeble-minded and i insane. (Figs. 2 

 and 3.) 



In nine fraternities in which both parents were feeble-minded, 

 there were 56 conceptions. Of these, 4 died before two years of age, 

 14 were too young for classification. Of the other 38 of whom 

 something definite is known, 7 were epileptic, 28 feeble-minded and 2 

 drunkards, who may or may not have been feeble-minded. (Fig. 4.) 



IS-rOI3-T-0^ I&-r-0 



W-^r-^ doOOt}6C)66<t 





JUUUUiUll 



Fig. 5. In this history the mother is epileptic and descended from an 

 epileptic mother; the father, who is alcohoHc, is also syphihtic; his mother 

 was insane. The first child is epileptic, the next two are neurotic, the last 

 died before two years of age, and following this there were thirteen mis- 

 carriages. In contrast to the central mating this chart shows two normal 

 matings; in these cases all of the children are normal. E, epileptic; F, feeble- 

 minded; S, syphilitic; /, insane; Sx, sex offender; N, normal; A, alcoholic; 

 d inf, died in infancy. Case 1,772. 



These matings are of the type nulliplex X nulliplex, and seem to 

 justify the expectation that all children from these unions will lack 

 the determiner for normality. 



In five fraternities Vk'here one parent is insane and the other 

 epileptic or feeble-minded, there were 29 conceptions ; 5 died before 

 14 years of age, 2 unknown. Of the 22 available for study, 2 are 



