MIU, AND BY- PRODUCTS 307 



its proteid is not suitable for bread- making purposes. 

 Wheat germ contains a number of nitrogenous and phos- 

 phorized compounds which can be extracted along with 

 the oil, and which are laxative in character. On this 

 account, pure wheat germ cannot be fed alone or in large 

 amounts in a ration, but when combined with other foods, 

 it is valuable. 



415. Wheat Screenings are a mixture of various seeds 

 with occasionally the broken and shrunken wheat kernels, 

 and vary in composition and food value with the different 

 kinds of weed seeds present. When fed, they should be 

 finely ground so as to prevent the introduction of foul 

 weeds on the farm. During recent years, mustard seeds 

 have been removed from wheat screenings and sold as a 

 separate product, the oil which they contain being ex- 

 tracted and used commercially. 



416. Linseed Meal. When the oil is extracted from 

 flaxseed, linseed cake is obtained which, when ground, 

 forms linseed meal. Pure linseed meal should contain 

 36 per cent, crude protein. The darker-colored meals are 

 those which contain moist oil. Linseed meal is a con- 

 centrated nitrogenous animal food and is valuable for the 

 feeding of all kinds of farm animals. When used, it 

 should be combined with other foods. Linseed meal is 

 occasionally adulterated with flax screenings. Hence, in 

 its purchase, if adulteration is suspected, preference 

 should be given to the nut rather than to the fine ground 

 meal. The cake itself is not adulterated because weed 

 seeds and impurities must be removed in order to produce 



