yO QUESTIONS AND ANSWERS 



Why is it that the specific gravity is not a sure 

 indication that milk has been neither skimmed 

 nor watered? 



Because a sample of milk might be skimmed, or 

 partly skimmed, and then just water enough added 

 to reduce the specific gravity to what it was be- 

 fore the skimming took place ; thus there would be 

 no change in the specific gravity, although the milk 

 was adulterated. 



What is the approximate proportion of fat to solids 

 not fat in normal pure milks? 

 One cannot state the proportion definitely, since 

 the relative quantity of the constituents in milks 

 from different cows, breeds, etc., varies. In gen- 

 eral it will be found that the pure milk of a herd 

 contains fat and solids not fat closely approaching 

 some one of the proportions given in the following 

 table : 



Solids 

 Fat not fat Total solids 



3.00 8.40 11.40 



3.25 8.47 11.72 



350 8-55 12.05 



3.75 8.62 12.37 



4.00 8.70 12.70 



4.25 8.77 13.02 



450 8.85 13.35 



4.75 8.92 13.67 



5.00 9.00 14.00 



5.25 9.07 14.32 



5.50 9-15 14.65 



5.75 9.22 14.97 



6.00 9.30 15.30 



