PHYSICAL AGENTS 



127 



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

 86, 87, 88). 



Fig. 80. — A steam chamber used in government disinfection work. Size 

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



Fig. 81. — 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 



