A Biochemical Study of Streptococci 



With Special Emphasis on the Determination of 

 Their Chemical Composition 



DISSERTATION 



Submitted in partial fulfillment of the requirements for the degree of 



Doctor of Philosophy in the Faculty of Pure Science of 



Columbia University 



By 

 FRANCES KRASNOW, B.S., A.M. 





NEW YORK CITY 

 1922 



