208 A Mm tool of Vetervncvry Physiology. 



whilst on one of oat straw and beans the urea fell to '84 

 per cent. When the urea is high, the hippuric acid is low, 

 and vice versd. The largest amount of hippuric acid is 

 produced by feeding on the straw of cereals, the smallest 

 amounts by feeding on leguminous straw, whilst a medium 

 amount is produced by feeding on hay. 



The urine of ruminants contains less aromatic sulphur 

 compounds than that of the horse, and more of the in- 

 organic sulphur, but, like the horse, the phosphates are 

 either absent, or only occur in small amounts. 



Here is a table of Tereg's showing the composition of the 

 urine of the ox on different diets, the observations extend- 

 ing over four months : 



Calves still sucking excrete an acid urine, rich in 

 phosphates, uric acid, creatinin, and a peculiar substance 

 allantoin; it is poor in urea, and, according to Moeller, 

 contains hardly 1 per cent, of solids. 



The Urine of the Sheep has an alkaline reaction, and the 

 amount excreted is from '85 pint to 1-36 pints. Tereg gives 

 the following percentage composition of a sample : 



