34 



METHODS OF STERILISATION 



dimension than the steriliser itself, and provided with 

 handles. The top of the steriliser is hinged to form a lid. 



METHOD. 



1. Place the instruments, etc., to be sterilised in- 

 side the copper basket, and replace the basket in the 

 steriliser. 



2. Pour a sufficient quantity of water into the ster- 

 iliser, shut down the lid, and light the gas below. 



FIG. 28. Koch's steriliser. 



FIG. 29. Arnold's steriliser. 



3. After the water has boiled and steam has been 

 issuing from beneath the lid for at least ten minutes, 

 extinguish the gas, open the lid, and lift out the wire 

 basket by its handles and rest it diagonally on the 

 walls of the steriliser; the contained instruments, etc., 

 are now sterile and ready for use. 



4. After use, or when accidentally contaminated, 

 replace the instruments in the basket and return that 

 to the steriliser; completely disinfect by a further boil- 

 ing for fifteen minutes. 



5. After disinfection, and whilst still hot, take out 



