Animal Nutrition. 49 



[t follows, therefore, that in some of their functions at least, amides 

 nay replace albuminoids. It has been found also by indirect 

 isperiments that equally good results have been obtained, where 

 imides have been substituted for part of the albuminoids in the 

 ■ation for growing animals and milch cows, as were obtained 

 yhen albuminoids only were fed. In corroboration of the above 

 ve have the similar feeding value of corn silage and a correspond- 

 ng quantity of di-y fodder corn. (655) SUage often contains 

 learly half its nitrogen in amide form, while dry fodder corn 

 las not more than from 12 to 15 per cent, of its nitrogen in the 

 orm of amides. 



72. Influence of salt on protein consumption. — Experiments by 

 T'oit with dogs, and by Weiske with sheep, have shown that a 

 Qoderate addition of salt to the fodder increases the activity of 

 he secretion of the body juices and their circulation, and con- 

 equently incieases the protein consumption in the body. Salt 

 Las a stimulating influence on the appetite of the animal, facili- 

 ates the passage of albuminoids from the digestive canal into the 

 ilood, and in general increases the energy of the vital processes. 

 ?he feeding of salt is therefore especially in place with horses, 

 oimg animals and milch cows when fed to their full capacity. 



Another effect of salt is to increase the excretion of urine. K 

 ftcr supplying salt the animal is prevented from drinking water, 

 tien water which would otherwise pass off through the lungs and 

 kin will be diverted to the kidneys, and if the supply from this 

 jurce is not sufficient, water will further be drawn from the body 

 issues. The live weight of the animal can therefore shrink 

 ipidly when salt is administered freely and little water is given; 

 fterwar^, when water is offered, much will be drank, and this, 

 3turned to the digestive tract and tissues, will cause the animal 

 ) increase rapidly in weight. 



73. Influence of water on protein consumption. — Abnormally 

 irge quantities of water cause a waste of nutrients in the bodies 

 f animals through increased protein consumption. Voit has 

 lown an increase in protein consumption of 25 per cent, from 

 us source in case of a fasting dog, and Henneberg found an 

 4 



