44 THE STOCKFEEDER'S COMPANION 



ingly rich in carbohydrates. Very often we find that 

 foods rich in oil are also rich in albuminoids ; e.g., 

 linseed and decorticated cotton cakes. The undecorti- 

 cated cotton cakes, brewers' grains, etc., although 

 fairly rich in albuminoids and oil, possess a consider- 

 able percentage of fibre, which decreases their value 

 to some extent for fattening purposes. In this mode 

 of subdivision, interesting points are revealed with 

 regard to the seeds from different natural orders of 

 plants ; e.g., leguminous seeds (pulse grains) are rich 

 in albuminoids and poor in oil. Cereal grains are 

 exceedingly rich in carbohydrates. (See Table, pp. 



45-470 



With these general remarks we will now proceed to 



examine the various foods and feeding stuffs in greater 

 detail. 



(a) Concentrates Rich in Oil. 



Plax Seed, or Linseed. This is the seed of the 

 flax plant (Linum usitatissimuni), and is grown chiefly 

 in Canada, South America (River Plate), Russia, and 

 India (Calcutta) for its seed, which is extremely rich 

 in oil (37 per cent.) and fairly rich in albuminoids 

 (20 per cent.). The composition, however, varies 

 according to the climate in which it is produced ; e.g., 

 warmer climates like India appear to produce seeds 

 with a higher percentage of oil, while in colder climates 

 (America) the oil content is somewhat less. Russian 

 seed is apt to contain rape or other weed seeds. In 

 Ireland the plant has been grown largely for its fibre, 

 but it is the seed which most concerns us at present. 



Approximately half a million tons of flax seed are 

 imported into this country annually, primarily for the 

 extraction of linseed oil, which is used so largely for 



