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 modifications and 

 precautions are necessary to insure correct results such 

 as (i) special form of test-bottle, (2) particular care 

 in sampling cream, (3) weighing the cream to be used 

 in the test instead of measuring it, (4) variations in 

 some details of the test and (5) special control of the 

 meniscus. 



USE OF MILK-TEST BOTTLES IN TESTING 

 CREAM 



Milk-testing bottles can be used in testing cream 

 only under special conditions. Their use is generally 

 inconvenient and it is only in rare cases that they are 

 ever now employed: Cream containing over 8 or 10 

 per cent, of fat will fill the neck of the test-bottle too 

 full for measurement, when we take 18 grams (about 

 17.5 cc.) to test. This difficulty may be overcome in 

 two ways : ( i ) By using a sample of cream less than 

 1 8 grams, and (2) by dividing an 1 8-gram sample 

 into 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 (p. 88). 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 



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