Condensed Milk and Milk Powder 225 



The solids not fat are determined by the formula 



L 



+ .2 x f 



4 



The specific gravity of the milk solids is determined by the 

 formula 



t 



t- 100s- 100 



s 



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 



32 



Total solids + 1.2 x 4 = 12.8 per cent. 



4 



32 



Solids not fat + .2x4 = 8.8 per cent. 



4 



Specific gravity of milk solids 



12.48 



12.48 - 100 x 1.032 - 100 = 1.33 



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 



26 



Total solids + 1.2 x 3.8 = 11.06 per cent. 



4 



26 

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



4 



Specific gravity of milk solids 

 11.06 



11.06 - 100 x 1.026 - 100 = 1.295 

 1.026 



