ACTION OF SALTS. 187 



Behring found that to prevent the development of anthrax spores a 

 solution of 1 : 8,000 was required. 



Sodium Borate. In the writer's experiments a saturated solu- 

 tion of borax was found to be without germicidal power. A twenty- 

 per-cent solution does not destroy the virus of symptomatic anthrax 

 (Arloing, Cornevin, and Thomas). A five-per-cent solution failed 

 to destroy anthrax spores in fifteen days (Koch). Antiseptic in the 

 proportion of 1 : 14 (Miquel). 



Sodium Carbonate. A solution of 2.2 per cent restrains the 

 growth of the typhoid bacillus, and of 2.47 per cent of the cholera 

 spirillum. The first-named bacillus is killed by four or five hours' 

 exposure in a 2.47-per-cent solution, and the cholera spirillum by 

 3.45 per cent (Kitasato). 



Sodium Chloride. A saturated solution failed in forty-eight 

 hours to destroy the virus of symptomatic anthrax (Arloing, Corne- 

 vin, and Thomas). A saturated solution failed in forty days to de- 

 stroy anthrax spores (Koch). A saturated solution failed in twenty 

 hours to destroy the tubercle bacillus in fresh sputum (Schill and 

 Fischer). In the writer's experiments a five-per-cent solution failed 

 to kill Micrococcus Pasteuri in blood. Antiseptic in the proportion 

 of 1 : 6 (Miquel). According to Forster, the bacillus of typhoid 

 fever, the bacillus of rouget, and the streptococcus of pus are not 

 killed by several weeks' exposure in strong solutions of sodium chlo- 

 ride, but the cholera spirillum is destroyed in a few hours. Cultures 

 of the tubercle bacillus are not sterilized in two months by a satu- 

 rated solution ; and tuberculous organs from an ox, preserved in a 

 solution of salt, did not lose their power of infecting susceptible ani- 

 mals inoculated with material from the diseased tissue. The flesh 

 of swine which died of rothlauf was found by Petri to still contain 

 the bacillus in a living condition after having been preserved in 

 brine for a month. 



Sodium Hyposulphite. In the writer's experiments a saturated 

 solution failed in two hours to kill micrococci and bacilli. Exposure 

 for forty-eight hours to a fifty-per-csnt solution does not destroy the 

 virus of symptomatic anthrax (Arloing, Cornevin, and Thomas). 

 Antiseptic in the proportion of 1 : 3 (Miquel). 



Sodium Sulphite. The results with a saturated solution of this 

 salt were, in the writer's experiments, entirely negative. 



Tin Chloride. A one-per-cent solution acting for two hours de- 

 stroyed the bacteria in putrefying bouillon, while 0. 8 per cent failed 

 (Abbott). 



Zinc Chloride. In the writer's experiments 1:200 destroyed 

 Micrococcus Pasteuri in two hours, but a two-per-cent solution was re- 

 quired to kill pus cocci in the same time ; spores of Bacillus anthracis 



