TESTING FOR BUTTERFAT 



615 



pipetting into the test bottle. If the composite sample has received 

 the proper care, as directed in Chapter VI, the gentle shaking of the 

 sample bottle and the pouring of the contents from one bottle to 

 another several times should be sufficient. 



I--""-"-.-: "-""_-- -' 



Fig-. 88 Pig-. 89 Fig-. 90 Fig-. 91 



Standard Babcock Milk and Cream Test Bottles 



Courtesy Louis F. Nafis 



Samples containing lumps of cream or granules of butter cannot 

 be tested properly without extra preparation. They should be 

 heated to at least 110 degrees F., or until all lumps of butterfat 

 have melted and disappeared ; they should then be shaken vigorously 

 and pipetted into the test bottle at once. Even with this precaution 

 it is difficult to transfer to the test bottle a representative portion 



