(TRADE MARK) 



Dehydrated Culture Media 



A Substantial Contribution to the Advancement of 

 Bacteriological Art and Science 



Complete culture media of standard accepted formulae, 

 adjusted and cleared, in powder form, completely sol- 

 uble in hot water. 



Each package carries on the label the name of the medium, 

 its complete formula, directions for use, its final reac- 

 tion on the basis of hot phenolphthalein titration, 

 and also its final pH value at the temperature of 

 incubation when directions are followed. 



By dissolving the specified weiglit of powder in the required 

 quantity of water, a finished culture medium of definite 

 composition is obtained. 



Uniformity of culture media to a degree hitherto impossible 

 is assured by the use of dehydrated media; one can 

 produce at any time, anywhere, any quantity of any 

 medium, identical in composition and reaction with all 

 other batches of the same medium, whether made by 

 the same or another individual, whether made in the 

 same or another laboratory. 



Bacto-Nutrient Agar, Dehydrated Bacto-Dextrose Broth Dehydrated 



Bacto-Nutrient Broth, Dehydrated Bacto-Lactose Broth, Dehydrated 



Bacto-Endo's Agar, Dehydrated Bacto-Litmus Milk, Dehydrated 



Bacto-Whey Broth, Dehydrated Bacto-Nutrient Gelatine, Dehydrated 



Bacto-Litmus Lactose Agar, Dehydrated 



Bacto-Neutral Red Medium, Dehydrated 



Bacto-Lactose Peptone Bile, Dehydrated 



Bacto-Loeffler's Blood Serum, Dehydrated 



Digestive Ferments Co., 



Detroit, Mich. 



U. S. A. 



