A STUDY OF THE BOAS-OPPLER BACILLUS 443 



lactic acid. No acid was produced in maltose broth by strains 

 from pathological conditions. 



7. The lactic acid produced by the strains of Boas-Oppler 

 bacilli studied by us is of the levo-rotatory modification. 



8. A stram isolated from the intestinal contents of a bottle- 

 fed infant coagulated milk and produced 1.05 per cent (lactic) 

 acid in twenty days. In maltose broth 0.36 per cent (lactic) 

 acid was produced by this strain. 



9. Lacto-bacilli were found in material from decayed teeth 

 from which desiccated mucus had been removed. This fact 

 suggests that Streptothrix huccalis is perhaps a lacto-bacillus 

 of the low-acid forming type. 



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