TESTING OF MILK AND CREAM 95 



as near 60 Fahrenheit as possible, in order to get 

 an accurate reading. 



; , Gerber Milk Test. 



The Gerber Milk Tester is an apparatus used 

 for testing milk, in order to find out what percentage 

 of fat it contains. The complete tester, including 

 bottles, pipettes, amyl alcohol, and sulphuric acid, 

 may be obtained through any South African 

 Creamery Co. or dealer in supplies. 



We begin this test by measuring off the amount 

 of sulphuric acid to be used 10 cubic centimetres. 

 A special pipette or glass measure is supplied with 

 the apparatus, which gives the different measures. 

 Having measured 10 cubic centimetres of acid this is 

 placed into the test bottle and followed by one cubic 

 centimetre of amyl alcohol of the best quality, and 

 this is followed by 1 1 cubic centimetres 1 of the milk 

 to be tested. Care must be taken that these are all 

 introduced into the test bottle in the order given. 

 The cork may now be placed in position and the 

 test bottle well shaken in order to mix the con- 

 tents, care being taken to mix the acid in the 

 neck with that in the body of the bottle. If more 

 than one test is being made, place those bottles 

 which have been prepared in a bath of hot water 

 which should be at a temperature of 130 to 150 F. 

 When all the bottles are ready place them in the 

 machine as indicated, and turn the handle of 



1 Known hereafter as c.c. 



