LINSEED FEEDS 59 



Most of the linseed oil now on the market is obtained by the 

 old process, so that old process oil meal is the kind most 

 in use as a stock feed. The new process extracts the oil 

 somewhat more completely than does the old, so that the 

 old process oil meal is somewhat higher in fat and slightly 

 lower in protein content. In extracting the oil by the new 

 process, however, the seed is heated by steam to drive off 

 the naphtha. This heating lowers the digestibility of the 

 protein so that the amount of digestible protein in the two 

 feeds is nearly the same. Linseed meal is a valuable feed 

 on any stock farm, but it is too rich and high priced to feed 

 in large amounts. Its high content of protein makes it an 

 excellent feed to add to rations low in this nutrient. Its 

 high content of oil gives to it a mild laxative effect. 



For dairy cows, about ten per cent of linseed meal in the 

 grain ration increases the flow of milk and improves the con- 

 dition of the animal. For young calves a small amount of 

 oil meal improves the quality of the ration. Breeding 

 animals should receive a small amount of the feed in the 

 ration. Animals that are being fitted for show or sale are 

 given an added appearance of thrift and finish by the use of 

 oil meal. A small amount of this feed will improve the 

 rations of both sheep and hogs. 



BY-PRODUCT FEEDS FROM SLAUGHTERING 

 OF ANIMALS 



The principal by-products of the great slaughtering 

 houses furnished to the feeder of live stock are tankage, 

 dried blood, and meat meal. These feeds are all rich in 

 protein and some of them are high in mineral matter. 



Tankage. — Tankage is prepared by boiling down refuse 

 material from slaughtered animals in order to secure the 



