12 QUESTIONS AND ANSWERS 



2. Requires much space. 



3. Requires much labor. 



4. Milk may become seriously contaminated by 

 long exposure in unclean places. 



5. Cannot fully control the ripening of milk. 



6. The skim milk is not in the best condition for 

 feeding to calves. 



What are the advantages of the deep-setting sys- 

 tem? 



1. Furnishes good cream. 



2. Easy to operate. 



3. Not expensive. 



4. Very good system if one has ice or cold water. 



What are the disadvantages? 



1. Considerable loss of fat. Seldom can more 

 than 93 per cent of the fat be secured by this 

 method. 



2. Skim milk is not fresh, although sweet. 



What are the disadvantages of the dilution method? 



1. Greater bulk. 



2. Skim milk less valuable. 



3. Danger of undesirable bacteria in impure 

 water. 



4. Cream is not normal in solids-not-fat com- 

 position. 



5. Loss of fat is as great as in deep-setting sys- 

 tem. 



What four principles have been used by separator 



manufacturers ? 

 I. Revolving bucket centrifuge. 



