PHYSICAL AGENTS 



129 



is cooled (beer, wine, grape juice, bottled milk) (Figs. 91, 92, 

 and 93). 



Fig. 85. — A steam chamber used in government disinfection work. Size, 

 4 feet 4 inches x 5 feet 4 inches x 9 feet. 



Fig. 



-Circular steam chamber used in government disinfection work, 

 54 inches in diameter. 



2. Pasteurizing machines are used and the fluid flows 

 through continuously. In one type the temperature is raised 

 9 



