x MODES OF DESTRUCTION OF B. PESTIS 301 



others would be found to be less powerful than phenol or 

 formalin, but that their actual phenol coefficient need not 

 be the same as when working with pure culture. This is 

 shown by the experiments of Kenwood and Hewlett 

 {Public Health, February 1906, p. 269), by which it was 

 ascertained that, using cyllin and izal for disinfection of 

 B. typhosus in faeces or urine, the coefficient is lower 

 than when using pure culture of the B. typhosus — as I 

 myself had already previously demonstrated, — and 

 further, that the relative position of these two substances 

 qud phenol coefficient may be equal or even reversed. 



THE END 



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