278 



C.-E. A. WlNSLOW AND E. E. LOCHRIDGE 



TABLE 15. 

 DISINFECTANT ACTION OF ACETIC Aero ON B. coli IN i PER CENT PEPTONE SOLUTION. 



TABLE 16. 

 DISINFECTANT ACTION OF BENZOIC Aero ON B. coli IN i PER CENT PEPTONE SOLUTION. 



TABLE 17. 

 DISINFECTANT ACTION OF BENZOIC Aero ON B. typhi IN 



PER CENT PEPTONE SOLUTION. 



normal. In the presence of peptone the required strength is o. 1395 

 normal. With B. coli the corresponding 100 per cent reduction 

 strengths for benzoic acid are 0.0199 in water and 0.0473 in peptone 

 solution. With B. typhi the respective strengths of benzoic acid are 

 0.0057 and 0.0243. 



In a general way we may say that the presence of i per cent pep- 

 tone solution diminishes the toxicity of hydrochloric acid, measured 

 in terms of dissociated hydrogen, to from one-eighth to one-tenth its 

 water value, and that of sulphuric acid to from one-fifth to one-eighth 



