72 QUESTIONS AND ANSWERS 



solids not fat is reduced, it is safe to conclude that 

 the milk was watered. 



If a sample of milk gives a Quevenne lactometer 

 reading of 29, and *is found, upon testing and 

 applying the formula for solids not fat, to have 

 4 per cent of fat and 8 per cent of solids not fat, 

 was it adulterated? How much, and what was 

 the form of adulteration? 

 One may conclude that any milk having 4 per 

 cent of fat should have at least 8.6 per cent of 

 solids not fat. It would then be plain that the milk 

 was watered, since the solids not fat are, reduced 

 approximately 7 per cent, determined as follows: 

 8.6— 8=.6. 

 .6-^8.6=.o697X 100=6.97 per cent of added water. 



How may one detect when a sample of milk has 

 been skimmed? 



If the suspected sample has a low percentage of 

 fat, higher lactometer reading, and an equal or 

 larger percentage of solids not fat than the control 

 sample, then it is safe to conclude that the milk 

 was skimmed. 



If a sample of milk has a Quevenne lactometer read- 

 ing of 33 and contains 3 per cent of fat, was it 

 adulterated? ' In what way was it adulterated, 

 and how much? 



Determine the solids not fat by the formula : 



-^ +.2F=solids not fat. 



33-^4=8.25. 



3X.2=.6o. 



8.25+.6o=8.85^olids not fat. 



