190 PRINCIPLES OF FEEDING FARM ANIMALS 



degermination the residue of the corn is bolted through sieves 

 separating out the hull and bran, which is sometimes sold 

 under the name of corn bran. The residue, consisting largely 

 of starch and gluten suspended in water, is passed very slowly 

 through long shallow troughs. The starch settles to the 

 bottom, while the gluten floats off into receivers. The 

 gluten is then dried and ground, forming gluten meal. 



Gluten meal, or '' corn-starch by-product without corn 

 bran," as it is sometimes called, is one of the richest concen- 

 trates in crude protein, containing 36.0 per cent. It is 

 also relatively high in fat. It is medium in content of 

 carbohydrates, but low in ash. However, only a small amount 

 of gluten meal is sold on the market as such, most of it being 

 mixed with corn bran and sold as gluten feed. 



Gluten feed, or '' corn-starch by-product with corn-bran," 

 as it is sometimes called, consists of gluten meal and corn 

 bran ground together. It is lower in protein and higher in 

 crude fiber than gluten meal, due to the presence of the corn 

 bran. Most of the gluten meal and corn bran is marketed 

 in this form. Sometimes the water used in the separation 

 of the starch and gluten is evaporated, and the soluble pro- 

 teins, mineral matter, and carbohydrates, or the '' corn 

 solubles," which it contains are added to the gluten feed. 



The chemical composition of gluten feed is as follows: 

 water, 8.5 per cent; ash, 1.9 per cent; crude protein, 25.9 

 per cent ; crude fiber, 7.2 per cent ; nitrogen-free extract, 

 53.3 per cent ; and fat, 3.2 per cent. Its net energy value 

 is 79.3 therms per 100 pounds. 



For Growing Stock. — For all young animals, gluten meal 

 is more satisfactory than gluten feed, inasmuch as it is less 

 bulky. It should be fed with a little linseed oil meal for 



