R N. Salaman 283 



is typically Jewish. A reference to Burke showed that in the family 

 tree of both parents was Jewish blood. 



To obtain portraits of families for the purpose of exhibition has 

 been a most diflScult matter, but I am able to show in Plates XXXVIII. 

 and XXXIX. a few examples. 



To the student of heredity, the phenomenon of dominance is, after 

 all, a matter of secondary importance. The vital question that he has 

 to deal with is, whether the character in question is one which 

 segregates or not, i.e. when in an individual the character and its 

 opposite are both present, are these two opposite characters represented 

 together in the sex cells or gametes, or does one go to one gamete and 

 the other to another ? Two methods are open to us in testing this 

 question, one to observe the matings of the hybrid individual with 

 those possessing recessive character only, the other to observe the 

 matings of such hybrid individuals with each other. Of the matings 

 of hybrid with hybrid I have not found a single example. This is 

 hardly surprising when one considers the vastly greater choice the 

 hybrid has of finding his mate either in the Jewish community or 

 in the outside world. Of matings between hybrid and Jew I have 

 9 families where the Jew is the father and the hybrid the mother, 

 giving rise to 25 children, 13 of whom are undoubtedly Gentile and 12 

 are unequivocally Jewish. 4 families where the father is hybrid and 

 the mother Jewish, contain 7 children of which 2 are Gentile and 

 5 are Jewish. Taking the families together their offspring consist of 

 1.5 Gentile and 17 Jewish children, the Mendelian expectation being 

 equality. Besides these matings, I have been able to collect a certain 



TABLE II. 

 Hybrid and Jew. 



Children 



Nomber of Families Father Mother ,, *- >, 



Jew Hybrid Gentile Jew 



9 „ „ 13 12 



4 Hybrid Jew 2 5 



Total 13 — — 16 17 



number of families where a hybrid has married a Gentile. In 4 the 

 father is hybrid, the mother Gentile, with 8 offspring all Gentile in 

 appearance. In one the mother is hybrid and father Gentile with 3 

 Gentile offspring (cf. Table III). I have indirect knowledge of several 

 other families comprising a large number of children all of whom are 



19—5 



