60 BACTERIOLOGICAL ANALYSIS. 



course this rapidly destroys the instrument. Boiling is 

 certainly the most efficacious method for daily use. 



Dressings. Gauze, gauze sponges, towels and ap- 

 rons are best sterilized by exposing them to the action 

 of steam in the steam sterilizer for £ to 1 hour. They 

 should be first loosely wrapped in towels. If necessary, 

 they may be dried in the hot air sterilizer at 120°C for 

 15 minutes. 



