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. n. 



<e?^ 



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. 



