222 GERMICIDES AND ANTISEPTICS. 



Creosote, in the proportion of 1 : 200, is fatal to 

 the micrococcus of pus (S). 



Cupric Sulphate destroys the virulence of septi- 

 csemic blood in the proportion of 1 : 400 (S). The 

 activity of dried virus of symptomatic anthrax is 

 destroyed by a 20 per cent solution time of 

 exposure forty-eight hours (Arloing, Cornevin, and 

 Thomas). The metallic salts, from their showing 

 the highest average preventive power, form 

 Group I. Sulphate of copper here has not only 

 the highest individual average, but its three pre- 

 ventive points, in the three solutions, are very 

 much higher than those of any other substance 

 in the group (Dougall). 



Ether does not destroy the spores of bacilli after 

 thirty days' exposure (Koch). A brief exposure to 

 the vapor of ether destroys the infective power of 

 vaccine lymph (Braidwood and Vacher). 



Eucalyptol retards the development of the spores 

 of bacilli in the proportion of 1 : 2,500 (Koch). In 

 the proportion of 1 : 205, the development of bac- 

 teria in unboiled meat-infusion is prevented. The 

 bacteria in broken-down beef-tea are not destroyed 

 by 1 : 14 (de la Croix). 



Ferric Sulphate. A saturated solution of this 

 salt did not kill any of the test-organisms, and the 

 use of this agent as a disinfectant would evidently 

 be a serious error. It has, however, a decided 

 value as an antiseptic, having prevented the de- 

 velopment of all of the test-organisms in the pro- 

 portion of 1 : 200. Although not fatal to the 



