STERILISATION OF APPARATUS. II 



diaphragm is partly rilled with water, which is boiled 

 by means of a Bunsen flame or Fletcher burner, the 

 apparatus to be sterilised being placed in the chamber 

 above so as to be exposed to the steam. 



An ordinary steamer (such as is used for cooking 

 potatoes or fish) will answer every purpose. In pro- 



FIG. 7. Steam Sterilizer. 



curing such a steamer for bacteriological use it is best 

 to choose one that will accommodate a litre flask 

 holding a funnel, as it is often a great convenience in 

 the filtration of fluids which become solid on cooling to 

 carry out the process in an atmosphere of steam. 



Exact details of the way it is used will be given 

 subsequently. 



