66 



MILK AND DAIRY PRODUCTS PART 



The experiment is made in the following manner : The test- 

 bottle is held in the left hand so that the first finger closes 

 the graduated tube, and the thumb the small opening on the 

 side of the test-bottle ; thus the lower part of the latter points 

 upwards. With the help of the small glass cylinder the bottle 

 is filled with sulphuric acid to the mark. Then the milk is 



FIG. 29. The Large Butyrometer and Component Parts. 



well mixed by pouring it from one vessel to another, and the 

 pipette (which holds T54 c.c.) filled by sucking until milk 

 enters the mouth ; afterwards the pipette is closed with the tip 

 of the tongue. The contents of the pipette are then easily 

 transferred to the test-bottle, the milk being blown in so 

 that ib mixes with the sulphuric acid. A rubber cork is used 



