Temperature Apparatus 



25 



When possible, more certain methods are employed, 

 among them sterilization by superheated steam at 

 increased pressure (Fie;. 9) or sterilization by thy heat 

 (Fig. 10) at a greatly increased temperature. 



Many incubators and other devices are now employed 

 for the cultivation of bacteria, in order that they maj' 

 be studied under proper conditions of temperature ami 

 control. Fig. 9 represents a sterilizing apparatus and 

 not a culture oven. 



Fig. 10. Hot-air sterilizer, in which articles containing bacteria may be 

 heated until all germs are destroyed. 



