126 DISINFECTION— STERILIZATION— DISINFECTANTS 



a temperature of 100°, starting at room temperatures, 20° to 

 25°. Autoclaves may be used as simple steam sterilizers by 



Fig. S2. — Horizontal steam chest used in canning. Height, 32 inches; 

 width, 2B inches; length, 10 feet. 



leaving the escape valves open so that the steam is not 

 confined, hence they have largely replaced the latter.' 



' In the author's laboratory in the past ten years all sterilization except 

 those few objects in blood and serum work which must be dry, has been 

 done in autoclaves of the type shown in Fig. 80 which are supplied with steam 

 from the University central heating plant. A very great saving of time is 

 thus secured. 



