334 WHEAT. "^ 



906. The average composition of wheat, grain, and 

 Btraw is — 



1000 1000 



907. According to Boussingault, the ultimate com- 

 position of some wheat which he analyzed was — 



1000 1000 



908. The proportion of bran and flour obtained 

 from wheat varies very considerably. The flour, as 

 it is obtained from the mill, is usually separated by 

 sifting into four parts : namely, fine flour, which 

 amounts to from 70 to 80 per cent. ; boxings, from 6 

 to 10 per cent. ; sharps, from 5 to 7 per cent. ; and 

 6 to 8 per cent, of bran. There is usually a loss of 

 rather more than 3 per cent. The bran always con- 

 tains a considerable quantity of starch, soluble mat- 

 ters, &c. ; in the following analysis the term bran is 

 used to denote the insoluble fibrous husk alone. 



