DAIRY HUSBANDRY 
31 
EXERCISE NO. 23 
Object: To determine the accuracy of using various weights of cream for the 
Babcock test. 
Procedure: “The smaller the quantity of cream taken for a sample the 
greater is the error introduced by inaccurate weighings or 
readings. The result is rendered more accurately if two or three 
tests of a sample are made and the readings averaged.” (F. & 
W. If 91.) 
A. Accurately weigh out 18 grams of cream into each of two cream 
test bottles and test as in exercise 21. 
B. Accurately weigh out 9 or 10 grams of cream into each of two 
cream test bottles and use sulfuric acid in proportion. Then 
complete the tests as for part A. The per cent of fat may 
be calculated by the following formula. 
18 X Reading — _ %fat 
grams cream used 
Note: Any weight of cream from 3 grams up may be used. 
Observations: 
Sample 
Reading 
% fat 
Color 
Condition 
1 
a 
b 
2 
a 
b 
Conclusion: 
Questions: (1) Explain how a sample of cream may be tested by using 
10% milk test bottles. 
(2) What is the legal standard in Wisconsin for fat in cream? 
(3) If the weight of a 10 gallon can of water is 83.3 pounds, what 
would be the weight of a 10 gallon can of 25% cream? 20% 
cream? 
(4) If 295 pounds of cream test 33% fat, how many pounds of fat 
does it contain? 
References: F. &. W. ^f 85—96 inclusive, 305, 307, Table X\ I, Van S. 
pp 73-92, Jud pp 75-85; St. pp 119-128. 
