THEORIES OF IMMUNITY, 



The complement and the immune body are 

 boimd to the blood corpuscle molecule, and the 

 P atom-group acts in such a way as to produce 

 the precipitate. 



The production of the precipitine power re- 

 quires : 



1. Blood serum, molecule^H-f-XH-X 



2. The body cell, molecule=H+J7-HN"+X 



3. The complement, molecule=iZ+P+X 



The complement and the blood serum mole- 

 cule are bound to the tissue cell by the H atom- 

 groups; these latter in the tissue cell molecule 

 are reproduced in excess and are thrown off 

 after this reproduction occurs and exist free as 

 H+J3-hX=the immune body, ready for the pro- 

 duction of the precipitine reaction when the need 

 arises. 



Any specific reaction — as that resulting from 

 the addition of rabbit's blood to the goat — may 

 be represented by the addition of the sub-letters 

 desired. 



The belief that the affinities existing in the 

 body cells are very numerous is forced upon the 



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