THE LTSmS. 151 



against this groap that the anti-body manifests its action. He also 

 showed that the nulk of the immunized goat contains the anti-body 

 and does not ooagnlate on the addition of rennet in quantities which 

 are sofficient to coagolate the nulk of normal animals. Bnchner * 

 thinks that the alexin (the complement, according to Ehrlich's 

 theory) is a ferment and that it is one and the same body in the 

 blood of all spedes of animals. The intermediary body (according 

 to Ehrlich's theory) is the only substance against which immunity 

 can be obtained. Tlas Bachner believes to be specific. 



^ MOnehener med. Woehmxhrifi, 1900. 



