GERMICIDES AND ANTISEPTICS. 221 



children were vaccinated with virus from ivory 

 points which had been exposed for six hours to an 

 atmosphere containing one half per cent of chlo- 

 rine (produced by the action of hydrochloric acid 

 on the peroxide of manganese, and collected over 

 warm water) ; also with four points, from the same 

 lot, not disinfected. Result : Vaccination was un- 

 successful in every case with the disinfected points, 

 and successful with those not disinfected (S). 

 Chlorine destroys the fresh virus of symptomatic 

 anthrax, but is powerless against that which has 

 been dried (Arloing, Cornevin, and Thomas). 

 Chlorine is classed with bromine, iodine, and 

 corrosive sublimate, as one of the most relia- 

 ble agents for destroying the spores of anthrax 

 (Koch). Development of bacteria in unboiled 

 beef-infusion is prevented by the presence of one 

 part in 15,606, and the bacteria of broken-down 

 beef-tea are destroyed by 1 : 1,061 (de la Croix). 



Chromic Acid, in the proportion of 1 : 1000, de- 

 stroys the virulence of septicaemic blood (S). The 

 development of anthrax spores is prevented by 

 1 : 5000 ; but chromic acid and its salts are ineffi- 

 cient for the destruction of these spores (Koch). 

 Chromic acid was found to have a preventive 

 power surpassing all others, its average being 

 1 : 2,200, while that of carbolic acid is only 1 : 226 

 (Dougall). 



Citric Acid., in the proportion of 12 per cent, 

 proved fatal to the micrococcus of pus, while 10 

 per cent failed (S). 



