LYSINS 89 



cytolytic, or hasmolytic, the substances acted upon 

 (bacteria, blood-corpuscles, etc.) are known as anti- 

 gens; the specific antibody (bacteriolysin, cytolysin, 

 hsemolysin) is spoken of as amboceptor; while the non- 

 specific factor in the reaction is known as complement. 

 Various diagnostic tests of the greatest practical 

 importance have this reaction as a basis, and will re- 

 ceive consideration in the following chapter. 



