SCIENCE— ADVERTISEMENTS 



BACTO-PEPTONE 



Dif CO Standardized 



The Original Standardized Peptone for Bacteriology 



Bacto Peptone is the original peptone designed to meet particularly the nutritional 

 requirements of bacteria in culture. 



It is the first peptone designed to meet the requirement of uniformity in its chem- 

 ical and biological properties. 



It is made in large quantities by expert workmen under rigid scientific check and 

 control. Raw materials are approved only after assay. Accurate records of each 

 lot are kept throughout the manufacturing process, and only those lots which pass 

 definite chemical and bacteriological tests are allowed to go into stock for distri- 

 bution. 



A definite requirement as to the H-ion concentration in solution was applied first 

 to Bacto-Peptone. 



It is standardized as to its Tryptophane content and supports vigorous Indol pro- 

 duction within 24 hours after inoculation. 



Bacto Peptone has passed the experimental stages and has proved its absolute de- 

 pendability for all nutritional requirements of Bacteriology. 



Bacto-Peptone Stands on its own Merits and Completely Substantiates all Claims 

 made for it. 



The additional equipment which we were forced to install in order to furnish the 

 unprecedented quantities of Bacto-Peptone requisitioned for the U. S. and allied 

 military establishments enables us to take care of all orders, irrespective of size, 

 promptly and uniformly. 



Carried in stock by the principal dealers in Scientific Supplies 



DIGESTIVE FERMENTS COMPANY 



DETROIT, MICHIGAN, U. 5. A. 



