324 



MILK 



for. Harding, Ruehle, Wilson, and Smith made a series of 17 

 tests to determine at what point bacterial pollution was of great- 

 est influence. The following figures were obtained: 



The strippings contained 57 bacteria per cubic centimeter 



Milk from the paU contained 161 " " " 



Milk from the cooler contained 426 " " " 



Milk from the can contained 443 " " " 



Milk from the strainer contained 473 " " " 



Fig. 153. — Combined sterilizing oven and truck. (A. U. Barber Creamery 



Supply Co.) 



Fig. 154. — Sterilizing oven. (A. H. Barber Creamery Supply Co.) 



