THE UNIVERSITY OF CHICAGO 



iE PREPARATION OF BACTERIAL 

 ANTIGENS 



A DISSERTATION 



SUBMITTED TO THE FACULTY OF THE OGDEN GRADUATE 



SCHOOL OF SCIENCE IN CANDIDACY FOR THE 



DEGREE OF DOCTOR OF PHILOSOPHY 



DEPARTMENT OF ANATOMY 



FROM THE LABORATORY OF PREVENTIVE 

 MEDICINE 



BY 



CLARK OWEN MELICK 





CHICAGO, ILLINOIS 



JUNE, 1922 



