BABCOCK TEST 77 



for a few minutes before reading. The reading 

 should be done from the lowest point of the fat 

 column to the highest point of the upper curve. 



Skim milk. In testing skim milk, slightly more 

 acid and a little more speed should be used. 



Cream. In testing cream, where accurate tests 

 are desired, the cream should be weighed on sensi- 

 tive balances, rather than measured with the pipette, 

 because of the different weight of creams of differ- 

 ent fat content and a variable amount of cream 

 sticking to the pipette. Slightly less acid is required 

 for cream, and the mixture should be allowed to 

 stand five or ten minutes before placing in the cen- 

 trifuge, in order to allow better action of the acid. 



