428 J- RUSSELL ESTY 



10. On the basis of acid production and spore formation in 

 glycerol and inulin broths members of the Clostridium Welchii 

 group may be divided into four sub-groups. 



11. Clostridium Welchii is a normal inhabitant of the intestines 

 and is very widely distributed in nature in the spore form. Milk 

 direct from the cow is free from Clostridium Welchii but becomes 

 contaminated through uncleanly methods and carelessness in 

 handling so that market milk at the time of delivery consistently 

 contains spores of this organism. The examination of 525 

 samples of milk indicate that Clostridium Welchii is present in 

 most market milk. 



The writer wishes to express his most sincere thanks to Prof. 

 F. P. Gorham and Dr. C. A. Fuller for many helpful suggestions 

 in carrying out this study. 



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Bull 1917 The prophylactic and therapeutic properties of the antitoxin for 

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