62 



BACTERIOLOGY. 



regulated so that any degree of pressure (and coinci- 

 dently of temperature) that is desirable can be main- 

 tained within the sterilizing chamber. These sterilizers 



Fig. 11. 



Autoclave or digester for sterilizing by steam under pressure. 



are known as "digesters" and as "autoclaves." 

 Their construction can best be understood by reference 

 to Figs. 10 and 11. 



