16 BULLETIN 570, U. S. DEPARTMENT OF AGEICULTUEE. 



All the chemical determinations given in the tables are of value in 

 judging the nature of by-products of rice found on the market. The 

 presence of rice hulls in rice bran is indicated at once by high ash, 

 particularly insoluble ash, and by a low ratio of insoluble to total ash. 

 Rice hulls also are indicated by a high crude-fiber content. Low 

 figures in protein and fat may be due to an excess of hulls or to an 

 excess of broken rice due to poor material or careless milling, but, 

 when they are considered in connection with the figures for ash and 

 fiber, the character of the product can be judged accurately. 



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