58 QUESTIONS AND ANSWERS 



How may cream that is frozen be sampled? 



Samples should not be taken until the cream is 

 thawed and properly mixed. 



Can sour cream be accurately sampled? 



If it were absolutely necessary, approximate re- 

 sults might be secured by adding solid caustic soda 

 to neutralize the acid and dissolve the casein, then 

 take the sample after properly mixing. 



What quantity of cream should be used in the test 

 bottle? 



That depends upon the capacity of the graduated 

 neck and the richness of the cream. If the neck 

 were graduated from zero to 30 per cent and the 

 cream tested more than 30 per cent, less than 18 

 grams of cream would have to be used, and the per 

 cent would be as much greater than the observed 

 reading as the quantity taken was smaller than 18 

 grams. 



How should cream in sample bottles be prepared 

 for testing? 



If the cream is in a fluid condition it may be 

 mixed by pouring from one bottle to another several 

 times, but if it is lumpy and thick, or has dried on 

 the bottle, it should be warmed to 105° F., then 

 properly mixed and sampled. To destroy lumps, 

 pass it through a fine sieve, then mix and test 

 Heating above 105° F.' is liable to separate some 

 fat from the rest of the cream. 



Why should the cream sample be weighed rather 

 than measured? 



