3 4 8 PHYSIOLOGY. 



1. Fire ; complete destruction by burning. 



2. Steam under pressure, 105 degrees C. (221 degrees F.), for ten minutes. 



3. Boiling in water for half an hour. 



4. Chloricl of lime ; a four per cent solution. 



5. Mercuric chlorid ; a solution of I : 500. 



For the destruction of material which owes its infecting power to the pres- 

 ence of microorganisms not containing spores, the committee recommends: 



1. Fire; complete destruction by burning. 



2. ISoiling in water for ten minutes. 



3. Dry heat ; no degrees C. (230 degrees F.) for two hours. 



4. Chlorid of lime ; a two per cent solution. 



5. Solution of chlorinated soda ; a ten per cent solution. 



6. Mercuric chlorid ; a solution of I : 2,000. 



7. Carbolic acid ; a five per cent solution. 



8. Sulphate of copper ; a five per cent solution. 



9. Chlorid of zinc ; 'a ten per cent solution. 



10. Sulphur dioxid ; exposure for at least twelve hours to an atmosphere 

 containing at least four volumes per cent of this gas in the presence of 

 moisture. 



Methods of Disinfecting. The committee would make the following 

 recommendations with reference to the practical application of these agents 

 for disinfecting purposes : 



For Excreta. (a) In the sick room : 



1. Chlorid of lime, four per cent. 

 In the absence of spores : 



2. Carbolic acid in solution, five per cent. 



3. Sulphate of copper in solution, five per cent. 



(/>) In privy vaults : 



1. Mercuric chlorid in solution, I : 500. 



2. Carbolic acid in solution, five per cent. 



(c) For the disinfection and deodori/alion of the surface of masses of 

 organic material in privy vaults, etc. : 



Chlorid of lime in powder. 



For Clothing, Bedding, etc. (a) Soiled underclothing, bed linen, etc. 



1. Destruction by fire, if of little value. 



2. Boiling at least half an hour. 



