ISOHEMAGGLUTININS 



171 



in recognition of the priority of Jansky's work. Since the 

 majority of the hospitals insist upon using the classification of 

 Moss it is necessary that this classification be taught to medical 

 students. 



Sugg-ested Method for Learning the Classification. — Experi- 

 ence in teaching has shown that if the student will associate the 

 new classification "0,A,B,AB," which is based upon the agglu- 

 tinogen content of the red cells, with some sentence such as 

 "Oh,A,Be,A-be," keeping in mind the law of reciprocal relation- 

 Cells (agglutiuogens) 



AgglU- HT Tir 1VI TT HI TTT MoSS I 



Moss Jansky tinin ^ ,'^°^\^\- a r^°''i ,T^ « .Y°'l T^T^ ^-B 



Content O (Jansky-I) A-(Jansky-II) B-(Jansky III) (Jansky IV) 



tn 



12: 



ur 



TS. 



iz 



K/S 



Fig. 6. — Distribution of agglutinius and agglutinogens in human blood groups. 



ships between agglutinogen and agglutinin postulated by Land- 

 steiner, he has no difficulty in remembering and understanding 

 this classification. It is also our experience that he has no diffi- 

 culty in remembering that the numerical groups of Jansky corre- 

 spond to the "0,A,B, and AB" groups of the new classification 

 and that in Moss's classification groups I and IV of Jansky's are 

 reversed. Bj' learning the ncAV classification and the law of 

 reciprocal relationships he has learned the agglutinogen and ag- 



