No. 6. 



DEPARTMENT OF AGRICULTURE. 



601 



New England Control reports do not discuss this feeding-stuff. 

 Jenkins and Winton compiled tlie results of seven analyses made 

 j)rior to 1892. Tliey compare with the foregoing, omitting No. 151, 

 as follows: 



These analj'ses are therefore about normal, though, as in case of 

 the corn meal, the tendency is toward a low protein average. 



No. 151 is found, upon examination, to contain a large proportion 

 of oat hulls, which, selling under the name given to this sample, 

 constitutes a serious adulteration notwithstanding the fact that the 

 material contains more protein than the other corn-and-cob meals. 



Gluten, Gluten Meal and Gluten Feed. 



These are by-products from the manufacture of starch and glu- 

 cose from corn.* 



The process is essentially as follows: The corn is soaked for 

 some hours in a weak solution of sulfurous acid. In the resulting 

 softened condition it is ground, the ground products being carried 

 off in the water. The germ or chit floats on the surface and is gath- 

 ered by skimming. The starch and gluten are carried off in the 

 water and deposit separately because the starch is heavier, the hull 

 having been previously separated by passing the water through 

 sieves. The starch thus separated is the main product. The other 

 materials are deprived of most of their moisture by pressure and then 

 kiln-dried. 



The gluten meal is sometimes sold by itself; often in combination 

 with the husk or bran, and sometimes the ''chit" or germ, as "gluten 

 feed." The composition of these by-products is subject to a further 

 variation from the fact that, in some factories, the corn oil is par- 

 tially removed. When the germ is kept apart, it is frequently de- 

 prived of a large fraction of its oil by hydraulic pressure; the press- 



* The so-called "Atlantic gluten meal" is an exception, being derivetJ instead as a by- 

 pi'oduct of the manufacture of wheat-starch. It contains 4S.9 per cent, of protein and 7.9 per 

 cent, of fat. 



