60 DAIRY LABORATORY GUIDE 



EXERCISE 7 



MEASURING AND WEIGHING CREAM 



Object: To determine the effects of measuring and 

 weighing thin and thick cream upon the accuracy of the Bab- 

 cock test. 



Apparatus : Samples of cream, four cream test bottles, 

 cream scale, and testing outfit. 



Steps : 1 . Number the bottles from 1 to 4. 



2. Mix the samples well by pouring them several times. 



3. Weigh 18 gr. of thin cream into bottle No. 1 and 18 

 gr. of thick cream into bottle No. 3. 



4. Measure with the pipette 17.5 c. c. of thin cream into 

 bottle No. 2 and 17.5 c. c. of thick cream into bottle No. 4. 



5. Proceed with the test as usual for cream; then read 

 and record the tests. 



Data: 



Application: 1. Compute the value at current prices 

 of the butter-fat lost in one year from a cow producing 

 750 Ibs. of cream. 



2. From your results, which is the correct way to transfer 

 the cream to the test bottle? Why? 



3. Why is the cream sample weighed instead of measured 

 into the test bottle? 



