THEORIES OF IMMUNITY. 



The foreign cell molecule in- 

 jected contains . . . H+JSH-X 



The tissue cell molecule, in the 

 body in which injection is 

 made, contains . . . H+.ff-HN'+X 



The complement molecule con- 

 tains ..... i/H-L+X 



The H groups in the tissue cells are repro- 

 duced in excess, and exist free as 

 H+.ff-f-X the immune body active in cytolysis. 



Precipitine reactions may also be shown : 

 The blood globulin molecule contains H+N+X 

 The immune body molecule contains H+.ZZ4-X 

 The complement molecule contains . iT+P+X 



The H groups being bound together, the L 

 atom-group may act, in this instance producing 

 the precipitate, and therefore it may be more 

 clearly represented as P. 



The production of the precipitine power occurs 



as in all the others: 



Blood injected, the molecule con- 

 tains H-HN"-fX 



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