30 
Pure and Mixed Linfced-Cakcs. 
Composition of Bran. 
Moisture 12 '86 
Oil 5-50 
* Albuminous compounds (flesh-forming matters") .. 13 '80 
Starch, gum, and digestible fibre 50 "17 
Woody fibre (cellulose) 11 ■ 50 
Mineral matter (ash) 6' 11 
100-00 
* Contaiuing nitrogen 2*24 
Yig.2^.— 0at-lin»k. Fig. 29.— BarloTj-hisJc. Fig. 30.— -BraH. 
Bran contains a larger amount of fatty matters and nitrogenous 
compounds than the whole grain of wheat, and for this reason it 
constitutes a valuable refuse, which the makers of adulterated 
oilcake turn to a very profitable account. It can be readily 
detected in cakes by its appearance under the microscope. 
The preceding woodcuts illustrate the appearance under the 
microscope of barley, oat, and wheat husks and skins. 
29. Flax-Cliaff. — The seed capsules in which linseed occurs, 
dried and ground fine, are used occasionally for adulterating 
oilcakes. 
A sample of flax-chaff analysed in my laboratory was found to 
have the following composition : — 
