,12 A DAIRY LABORATORY GUIDE 



EXERCISE I 

 THE BABCOCK TEST 



1. Draw the milk above the mark on the pipette 



and allow the milk to settle just to the mark. 

 Repeat this until some proficiency in the use of 



the pipette is obtained. 

 What two special precautions are to be observed 



in handling the pipette? 



2. Test by the Babcock method a sample of whole 



milk. Perform this test before doing either 



3 or 4- 



3. Measure out into your white cup 50 cc. of the 



same sample of milk used in experiment 2. 

 Add to this 15 cc. of water. Mix thoroughly 

 and test in duplicate by the Babcock method. 



4. Using milk from the same sample as used in 



experiment 2, measure out qo cc. of milk and 

 add to it 15 cc. of skimmed milk. Mix thor- 

 oughly and test in duplicate by the Babcock 

 method. The whole milk bottle should be used 

 in experiments 3 and 4. 

 Did you obtain the most fat in experiment 3 or 

 experiment 4? Include in your notes a brief 

 description of the Babcock test. 



