68 MODERN METHODS OF TESTING MILK 



alcoholic solution. After mixing the "sinacid" liquid 

 with the milk, the mixture is heated to 200 F. for 5 

 minutes before being whirled in the tester. The re- 

 sults do not always appear to agree closely with those 

 given by other tests, according to the reports of some 

 operators. There is, moreover, some natural preju- 

 dice against using a process, any part of which is 

 patented. 



Gerber's "Sal" Test. Gerber has just published a 

 method in which no acid is used. The full details are 

 not given, since the method is to be patented. Good 

 results are reported. 



