44 



THE FEEDING OF ANIMALS 



In brewing, the kernels of barley are subjected to a 

 leaching process which results in taking out the soluble 

 mineral salts, chiefly the salts of potassium, calciiun, and 

 sodiiun, leaving behind, in part, the compoimds of lime 

 and magnesium. This fact is made clear by comparing the 

 analysis of the ash of barley with that of brewers' grains: 



As a source of phosphoric acid and lime the brewers' 

 grains are more efficient, pound for pound, than the 

 original barley grains. 



55. The mineral compounds of animal bodies. — ^The 

 mineral compounds of animals are nearly similar in kind 

 to those of plants, but are very different in relative pro- 

 portions. This is made plain by a comparison of the 

 figures given below: 



