DESCRIPTION OF FEEDING-STUFFS 195 



products from millet. For young stock feeding 

 meals are particularly suitable, and are given in 

 the form of warm mashes, gruel, etc. 



(6) Residues from oil mills. 



The materials used in the manufacture of oils 

 are, as a rule, first freed from foreign substances 

 by means of sieves or winnowing machines. If the 

 seeds are large they are then husked or shelled and 

 broken up in a crushing or grinding machine. The 

 material so prepared is subjected to great pressure 

 between cloths, whereby the greater part of the oil 

 flows away. Another method of obtaining the oil 

 from the seeds is by extraction with carbon bi- 

 sulphide, petroleum ether, or benzine, in a suitable 

 apparatus. The residual material, whether pressed 

 or extracted, is ground up again and the pressure 

 or extraction repeated, sometimes also for a third 

 time. When the oil is extracted by pressure, the 

 residues are considerably richer in oil than in the 

 extraction process, where often only 2-3% is left. 

 The best oil cakes are prepared by the old or pressure 

 method, and these when ground are sold as oil 

 cake meals. The material left after extraction — 

 " new process " — is sometimes made into cake, but 

 more generally sold as meal. Linseed-cake meal 

 is therefore different to linseed meal, and generally 

 contains more oil. 



The residues from the oil mills, like all feeding- 



