CHAPTER V 



Method of Testing Cream by the Babcock Test 



The Babcock test can be used in ascertaining the 

 amount of fat in cream, but certain precautions and 

 modifications are necessary to insure correct results. 

 A special form of test-bottle is generally used. Spe- 

 cial pains must be taken in sampling cream. For 

 strictly accurate work, the cream sample must be 

 weighed for testing. 



USE OF MILK TEST-BOTTLES IN TESTING 

 CREAM 



Test-bottles used in testing milk can be used in 

 testing cream only under special conditions. Cream 

 containing over lo per cent, of fat will fill the neck 

 of the test-bottle too full for measurement, when we 

 take 1 8 grams (about 17.5 cc.) to test. This difficulty 

 may be overcome in two ways : ( i ) By using a sample 

 of cream less than 18 grams, and (2) by dividing an 

 18-gram sample in roughly equal parts between two or 

 more bottles, according to its richness in fat. In the 

 former case the per cent, of fat read is increased by 

 a correction to be considered later. In the second case, 

 the tests are made as in case of milk and the per- 

 centages found in the different bottles are added, the 

 sum being the per cent, of fat in the cream tested. The 

 volume of cream in each test-bottle is always made up 



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