To the Members of the 

 SOCIETY OF AMERICAN BACTERIOLOGISTS 



The Twenty-fourth Annual Meeting of 



the Society will be held at Detroit, 



December 28-29-30 



Detroit is the Home of "DIFCO" Products 

 for Bacteriological Use 



A cordial invitation to visit the "Difco" Laboratories 



is extended to all members and 



their friends 



DIGESTIVE Ferments Company 



