Sterilization and Disinfection 



Pyoktanin (methyl violet) . . . 1 : 2,000,0001 : 5000. 

 Formalin (40 per cent, solu- 

 tion of formaldehyd) 1 : 25,0001 : 5000. 



20,000. 



: 14,300. 



: 12,500. 



: 50001 



: 5000. 



: 1340. 



: 1000. 



:909. 



: 10001 

 1 : 526. 

 1 : 285. 

 1 : 277. 



200. 



500. 



Hydrogen peroxid 

 Bicblorid of mercury .... 



Nitrate of silver 



Creolin 



Chromic acid 



Thymol 



Salicylic acid 



Potassium bichromate . . 



Trikresol 



Zinc chlorid 



Potassium permanganate 



Nitrate of lead 



Izal 1 : 200. 



Boracic acid 1 : 143. 



Chloral hydrate 1 : 107. 



Ferrous sulphate 1 : 200 1 



Calcium chlorid 1 : 25. 



Creosote 1 : 20. 



Carbolic acid 1 : 20 :: 1 



Chloretone saturated solution. 



Alcohol 1 : 10. 



Ether. Pure ether will not kill anthrax spores immersed 

 in it for eight days. 



In a more recent study of disinfectants, Burgess * gives 

 the following comparisons: 



90. 



50. 



Biniodid of mercury 1 



Bichlorid of mercury 



Chlorinated lime 



Formaldehyd 



Lysol 



Carbolic acid . . 



5000. 



2000. 



100. 



40. 



20. 



20. 



As biniodid of mercury forms no combination with 

 albumin, Burgess regards it as the best general disinfec- 

 tant. 



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. 

 5000 

 2000 

 150 

 150 

 1000 



" Lancet," June 23, 1900. 



