Chemical Analysis of Milk and its Products. 219 



DETECTION OF ARTIFICIAL BUTTER. 



270. Determination of the specific gravity of the fil- 

 tered butter fat serves as a good preliminary test. A 



Apparatus used in "Fitch's Salt Analysis." 



number of practical methods for the detection of artifi- 

 cial butter have been proposed, but they are either worth- 

 less, in case of samples containing a considerable propor- 



