Supplies for Bacteriologists 



DIFCO STANDARDIZED 



For preparing Culture Media with scientific accuracy 



Any medium 



at any time — any quantity — anywhere 



always the same 



prepared from BACTO DEHYDRATED MEDIA by dissolving a given 

 weight of dry powder in a measured amount of water. 



Manufactured according to accepted formulae. 



Adjusted electrometrically to definite Hydrogen-ion concentration. 



Cleared and reduced to dry powder. 



A complete stock on your laboratory shelf, immediately available for use 

 as required, takes care of all emergencies, and eliminates the wasteful, 

 laborious, and time consuming procedure of preparing culture media in 

 the old way. 



Supplied in 1 lb. bottles. 



You can have at any time as much or as little as you 

 require of 



Nutrient Broth at 9 cents per litre 



Lactose Broth " 16 cents " " 



Nutrient A^ar " 16 cents " " 



Endo's A^ar " 42 cents " " 



Loeffler's Blood Serum " 1 cent *' tube 



Other Media at Proportionate Cost 



UNIFOBM-STANDARD - ECONOMICAL -- CONVENIENT 



Also the following line of Standardized Bacteriological Supplies, 

 prepared and tested scientifically: 



BACTO PEPTONE BACTO LACTOSE 

 BACTO AGAB BACTO DEXTBOSE 



BACTO GELATINE BACTO BEEF 



Literature and Prices Promptly Supplied 



DIGESTIVE FERMENTS CO., S™s"a: 



