172 PATHOGENIC BACTERIA. 



Pyoktanin (methyl violet) . i : 2,000,000 — 1 : 5000. 



Formalin 1 : 25,000 — 1 : 5000. 



Bichlorid of mercury . . . 1 : 14,300. 



Hydrogen peroxid 1 : 20,000. 



Nitrate of silver 1:12,500. 



Creolin 1 : 5000 to 1 : 200. 



Chromic acid 1 : 5000. 



Thymol 1 : 1340. 



Salicylic acid 1 : 1000. 



Potassium bichromate . . . 1 : 909. 



Trikresol 1 : 1000 — 1 : 500. 



Zinc chlorid 1 : 526. 



Potassium permanganate . 1 : 285. 



Nitrate of lead 1 : 277. 



Izal 1 : 200. 



Boracic acid 1 : 143. 



Chloral hydrate 1 : 107. 



Ferrous sulphate 1 : 90 — 1 : 200. 



Calcium chlorid 1 : 25. 



Creosote 1 : 20. 



Carbolic acid 1 : 20 : : 1 : 50. 



Alcohol 1 : 10. 



Ether. Pure ether will not kill anthrax spores immersed 

 in it for eight days. 



The value of antiseptics, like that of disinfectants, is 

 always relative, the destructive as well as the inhibitory 

 power of the solution varying with the micro-organism 

 upon which it acts. The following table, from Boer, 

 will illustrate this : 



Methyl Violet {Pyoktanin). 



Restrains. Kills. 



Anthrax bacillus 1 : 70,000 1 : 5000 



Diphtheria 1 : 10,000 1 : 2000 



Glanders 1 : 2500 1 : 150 



Typhoid 1 : 2500 1 : 150 



Cholera spirillum 1 : 30,000 1 : 1000 



Large numbers of both strongly and feebly antiseptic 

 substances have purposely been omitted from the above 

 lists, compiled from Sternberg and Micquel, as either in- 

 appropriate for ordinary use or as having been replaced 

 by better agents. 



