l6 QUESTIONS AND ANSWERS 



water, then washed with a brush and hot water 

 containing some good washing powder. Then 

 boiling water or steam should be used to sterilize. 

 The utensils should then be placed in a clean place 

 free from dust. It is a good plan to expose milk 

 cans, etc., to the direct rays of the sun, which have 

 the power of destroying bacteria. 



What is pasteurization? 



It is the heating of milk to at least 140° F. for 

 at least ten minutes for the purpose of destroying 

 bacteria. The milk is then usually cooled to a low 

 temperature. The word is derived from Louis 

 Pasteur, an eminent French scientist. 



What is sterilization? 



It is the heating of milk to at least 212° F. for 

 the purpose of destroying both bacteria and spores. 



How is milk usually pasteurized for commercial 

 purposes? 



1. By some form of pasteurizing machine in 

 which steam is the heating agent. 



2. By electricity. 



What are some of the reliable pasteurizing machines 

 on the market? 



1. Simplex. 



2. Miller-Tyson. 



3. Farrington. 



4. Wizard. 



5. Reid. 



