114 



PROCEEDINGS OF THE AMERICAN ACADEMY 



In 100 parts of albuminoids were obtained : — 



An analysis of the milk fermented by the American yeast shows 

 the presence of peptone, in some quantity, whereas sour milk fermented 

 by beer yeast gave only a trace, thus agreeing with Rudeck's analysis 

 for Kogelmann's kephir. From these analyses there is but one in- 

 ference, — the peptonizing power must lie, not in the Bacillus acidi- 

 lactis, which is common to all these true and false kephirs, but in the 

 yeast which Beyerinck has named Saccharomyces l^efyr, and which 

 exists in the United States. 



In conclusion, I would return my thanks to Prof. W, G. Farlow 

 and Prof. H. B. Hill, for advice given during the progress of my 

 work. 



