NUTRITIONAL FACTORS IN THE GROWTH 

 OF CERTAIN YEASTS AND BACTERIA 



By 

 Louis Freedman, Ph. B., M. S. 



o 

 NEW YORK CITY 



1922 



DISSERTATION 



submitted in partial fulfillment of the requirements for the degree of Doctor 

 of Philosophy in the Faculty of Pure Science, Columbia University, in the 

 City of New York. 



