GERMICIDES AND ANTISEPTICS. 235 



Zinc Sulphate, in the proportion of twenty per 

 cent, does not kill the micrococcus of pus ; but in 

 the proportion of 1.25 per cent, it destroys the 

 virulence of septicaemic blood. This is no doubt 

 due to restraining power, and cannot be taken as 

 evidence that the vitality of the septic micrococcus 

 was destroyed (S). 



