STUDIES ON H^MOLYSINS. * 119 



mixed sera which contain a great many different immune bodies would 

 prove the most effective; for with the multiplicity of the immune bodies 

 an increase of the different complementophile groups also takes place, 

 and thus the probability increases that the normal complements present, 

 especially those in the human organism, can come into action most effec- 

 tively. 



