EXERCISE 28. A, To DETERMINE PER CENT OF HULLS IN BUCKWHEAT 



FEED 



Weigh out 100 grams of the thoroughly mixed sample and separate it 

 into two portions by means of a 50-mesh sieve. Weigh each portion, repeat 

 the experiment and average the results. Calculate percentages of hulls and 

 middlings present in the sample. 



B, TEST FOR RICE HULLS 



Pure rice bran and rice meal contain considerable fat, and are not moist- 

 ened if placed on the surface of water. When a teaspoonful of a sample of 

 rice bran or rice meal adulterated with hulls is placed on the surface of water 

 in a tumbler the hulls will soon sink into the water. Make the test with a 

 sample of rice bran or meal of known purity for comparison. 



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