Grade . 

 Date. . 



EXERCISE 6. 



Object. — To test cream for fat content by Babcock method. 

 Apparatus. — Two cream bottles; acid 



measure; acid; 17.6 cc. pipette; 



sample of cream; two mixing 



beakers; scales; hot water bath. 

 Step 1. Mix sample of cream thor- 

 oughly by pouring from one 



beaker to another, care being 



taken not to churn it. 

 Step 2. Balance cream bottle A on 



scales and weigh into it 9 grams 



of cream. Duplicate in bottle B. 

 Step 3. Measure out about 9 cc. of 



water at 60° to 70° for each cream 



bottle. Add to each bottle. 

 Step 4. Measure out 17.6 cc. of acid 



for each bottle and complete test 



as for whole milk. 



(23) 



Small laboratory cream scales. 



Note. — Read cream test from bottom of fat column to bottom of top meniscus. 



Report. 



At the bottom of the page explain — 



1. Why cream columns are different from milk. 



2. Why cream is weighed out instead of being measured out, as is done 

 with milk. 



3. Why 9 cc. of water is added before the acid. 



