CONTRIBUTIONS TO THE STUDY OF IMMUNITY. 55 



The cow milk immune serum, owing to the character of its affinities, 

 is to be classed with the epithel immune serum. 



The interesting fact to be deduced from this is that milk con- 

 tains the same specific groups as the epithelial cells which produce 

 it; and this agrees very well with histological observations accord- 

 ing to which the protoplasm of the gland cells is itself used in the 

 production of the milk. 



After having found it possible to produce a specific epithel immune 

 serum by injections of cow milk, it seemed to me that immunization 

 with human milk might prove useful in the suppression of carcinoma, 

 especially mammary carcinoma. Thus far, however, the treatment 

 of dogs and rabbits with human milk has not yielded an immune 

 serum haemolytic for human blood, one corresponding to the cow 

 milk immune serum. 



