234 GERMICIDES AND ANTISEPTICS. 



of the bacteria of broken-down beef-tea (de la 

 Croix). 



Sulphuretted Hydrogen. Bacteria develop read- 

 ily in the presence of sulphuretted hydrogen 

 (Hamlet). 



Tannic Acid, in the proportion of one per cent, 

 destroys the virulence of septic blood (S). A one- 

 in-five solution of tannic acid has no effect upon 

 the virus of symptomatic anthrax (Arloing, Corne- 

 vin, and Thomas). A five per cent solution does 

 not kill the spores of anthrax (Koch). 



Thymol dissolved in alcohol destroys the virulence 

 of septicaemic blood (time of exposure half an 

 hour), in the proportion of 1 : 400 (S). Thymol 

 retards the development of anthrax spores in the 

 proportion of 1 : 80,000 (Koch). One part in 200 

 kills the bacteria of tobacco-infusion (Bucholz) ; 

 one part in 50 the sour-milk ferment (Molke) ; 

 and one in 20 the bacteria of broken-down beef- 

 tea (de la Croix). The development of bacteria 

 in unboiled beef-infusion is prevented by 1 : 1,340 

 (de la Croix), and in Pasteur's fluid by 1 : 2,000 

 (Bucholz). 



Zinc Chloride destroys the micrococcus of gon- 

 orrhceal pus in the proportion of two per cent ; 

 the septic micrococcus failed to multiply after ex- 

 posure to one part in 200 (S). A five per cent 

 solution failed within a month to weaken the de- 

 veloping power of splenic fever spores (Koch). 

 Liquor zinci chloridi (Squibbs) failed to kill the 

 micrococcus of pus, in the proportion of eight per 

 cent (S). 



