556 



In sheep urea and hippuric acid stand in the proportion of 

 2 to 3, whereas in cattle on the same diet the proportion is 2 of 

 urea to 11 of hippuric acid. The food most productive of 

 hippuric acid in the horse is old meadow hay, whilst new meadow 

 hay has this effect on sheep. It will be observed from the table 

 how rich the urine of the sheep is in hippuric acid. In sheep 

 there is very much more magnesia than lime in the urine, con- 

 sequently the reverse obtains in the faeces of this animal. 



The Urine of the Pig. 



This resembles that of carnivora, but its composition depends 

 on the character of the food. The specific gravity is 1003 to 

 1025. It is either acid or alkaline ; the amount excreted varies 

 between 1-5 to 8 litres (2 J to 14 pints), and it contains uric acid, 

 hippuric acid, xanthine, guanine, and much urea. 



In the following analysis of the urine the diet consisted of 

 peas, potatoes, and sour milk : 



Total urine - - - 4* 1 kilogrammes (7 pints) . 



Specific gravity - - 1018 



Dry substance - - 2-768 per cent. 



Total nitrogen - - 0604 „ 



Ammonia - - - 0024 „ 



Ash- . . . i' 234 „ 



The ash consists largely of phosphates and potassium salts, 

 a moderate amount of magnesium, and very little sodium or 

 calcium. 



The Urine of the Dog. 



It is impossible to give the composition of the urine of the 

 dog, as the amount of constituents secreted varies considerably 

 in dependence upon the nature of the diet. 



The urine is acid in reaction on a flesh diet, the acidity being 

 due to acid phosphate of soda ; on a vegetable diet it may be 

 alkaline. The amount excreted is from 0-5 to 1 litre (f pint to 

 1 1 pints) daily, but varies with the size of the animal and the 



