HUMAN PEDIGREES 17 



Mr. ?— No. 17 . . . . Husband of B No. 16, and 



introduced by marriage. 

 Normal. 



Fi Generation. 

 Master B No. 1 . . | Quite children. Sane up to the 

 Master B No. 2 . . ) year 1907. 

 Mr. B No. 3 . . Is now 22 years of age and in 1907 

 was sane. 



The two remaining children (Nos. 4 and 5) of this 

 generation are quite young, and their name, sex, and 

 age are not recorded. They have removed, with their 

 parents, from the village, and the desire of the family 

 is, I believe, to lose its identity. The children, none 

 the less, constitute two of the most interesting 

 members of the Pedigree, since they are the only 

 members in this Pedigree both of whose parents are 

 normal. Their future history is a matter of the 

 greatest importance, both from the Mendelian and 

 the medical standpoint. I am endeavouring still to 

 trace them. 



The Deductions from the Pedigree.* 

 We are not justified yet in saying dogmatically 

 that this Pedigree is an illustration of Mendelian 

 phenomena. But there are clearly some Mendelian 

 indications. In the P generation all the individuals 

 have passed the twenty-fifth year of life**, and 



* We follow the example admirably set by Professor Pearson, 

 in liis " Treasury of Human Inheritance," in keeping our interpreta- 

 tions apart from the facts of our Pedigrees. Those who seek for the 

 latter can thereby obtain them without wading through the former, 

 which at this stage of enquiry must necessarily be wholly tentative. 



** The youagest must be nearly forty. 



