CO 



BACTO-PEPTONE 



The Original Standardized Peptone for 

 Bacteriology. No other Peptone is 

 so uniform in its chemical and 

 Biological Constants 



PREPARED from basic materials carefully selected and 

 assayed. 



PROCESSED under scientific methods of factory con- 

 trol. 



STANDARDIZED by precise chemical and bacteriolog- 

 ical tests. 



ADJUSTED to give a definite H-ion concentration in 

 solution. 



INDOL REACTION assured by a constant tryptophane 

 factor, and gauged to a positive indication in 

 twenty-four hours. 



NITROGEN content never less than 15.2% in the form 

 of molecules ideally adapted for bacterial nutrition. 



ANTITOXIN made from Bacto- Peptone by purveyors 

 to the U. S. Military establishment and to foreign 

 Governments. 



MENTIONED favorably in current scientific literature 

 by disinterested authorities. 



IN USE all over the world. 



Bacto-Peptone stands on its own merits and com- 

 pletely substantiates all claims made for it 



Carried in stock by the principal dealers in Scientific Supplies 



1>igestive Ferments Company 



DETROIT, MICHIGAN, U. S. A. 



