298 Detection oe Adui^terants and Preservatives 



L = Quevenne lactometer reading at 60 degrees F. ; f = per 

 cent fat ; t = total solids ; s = specific gravity of milk. 



Example of milk that is normal- — Quevenne lactometer reading 

 at 60 degrees F. 32, fat 4 per cent. 



Answer : 



Specific gravity of the milk = 1.032 



Total solids ^ 1- 1.2 X 4 = 12.8 per cent. 



32 

 Solids not fat -^ 1- -2 X 4 = 8.8 per cent. 



Specific gravity of milk solids 

 12.8 



12.8— lOOX 1.032 — 100= 1.32 



1.032 



Example of milk to which water has been added. — Quevenne 

 lactometer reading at 60 degrees F. 26, fat 3.8 per cent. 



Answer : 



Specific gravity of milk = 1.026 



Total solids—^ + 1.2 X 3.8 = 11.06 per cent. 

 Solids not fat -~ + .2 X 3.8 = 7.26 per cent. 



Specific gravity of milk solids 

 11.06 



11.06 — 100 X 1.026—100=1.295 



1.026 



Example of milk from which cream was removed or to which 

 skimmed milk was added. — Quevenne lactometer reading at 60 de- 

 grees F. 35, fat 2 per cent. 



