The Bab cock Test 31 



the material out of the bottle. (Keep acid away from 

 face and eyes.) 



6. After the bottle has been stirred thoroughly and 

 the curd is dissolved, place the bottle in centrifuge 

 and whirl five minutes. 



7. Place bottles in water bath of 180 degrees F. for 

 five minutes and fill with hot water to neck. 



8. Whirl for two minutes. 



9. Place in water bath for five minutes and fill with 

 hot water to within one-half inch of the top of bottle. 



10. Whirl for two minutes. 



11. Place in water bath, 130 degrees F., for five 

 minutes. 



12. Measure fat column by placing one point of 

 dividers v at bottom and the other at the top ; then, 

 keeping dividers at that spread, place one point on the 

 zero mark and note where the other point falls on the 

 scale. That number will correspond to the per cent of 

 fat in the milk. 



To Test Cream. 



In testing cream, the samples of cream for testing 

 should be weighed instead of being measured. 



Weigh out 18 grams cream in cream bottle on an 

 accurate scale tested by State Officials having state 

 seal on it. Add sulphuric acid and shake until con- 

 tents in bottle are coffee brown (the exact amount of 

 acid to use cannot be specified. It must be enough 

 to cause cream to turn to a coffee brown color). Place 

 in tester, run seven minutes, stop, fill to neck with 

 hot water. Place in tester, run two minutes, then 



