336 A MANUAL OF VETERINARY PHYSIOLOGY 



table by Wolff, the diet being hay, oats, and straw. In every 

 ioo parts of salts there are found — 



Potassium ----- 36' 85 per cent. 



Sodium - - _ _ _ - 3*71 ,, 



Calcium - - - - - - 2192 „ 



Magnesium ----- 4-41 M 



Phosphoric acid - — 



Sulphuric acid - - - -17*16 „ 



Chlorine 1536 „ 



Silicic acid - - - - 0*32 „ 



In the table on p. 337 are given the results obtained by the 

 writer in the examination of the twenty-four hours' urine of 

 horses at rest and work.* 



Salkowskif examined the urine of the horse, and gives the 

 following as the composition of one specimen : 



In the following summary of the urine of animals other than 

 the horse, the main facts are those given by Tereg.J 



The Urine of the Ox. 



The urine of the ox is much the same as that of the horse, 

 excepting that it is secreted in larger quantities, 5-7 to 22-8 litres 

 (10 to 40 pints) ; the difference mainly depends upon the amount 

 of nitrogenous matter in the diet, for it has been shown that the 

 more nitrogen a diet contains the larger the amount of water 

 consumed. The fluid is clear, yellowish, and of an aromatic 

 odour ; it is of a lower specific gravity than that of the horse, 

 1020 to 1030 (in milch cows, according to Munk, 1006 to 1015), 

 owing to the larger amount of water secreted. The nitrogenous 

 matter found in the urine is mainly represented by urea and 

 hippuric acid, and the amount varies according to the diet. 

 On a diet of wheat straw, clover hay, beans, starch, and oil, the 



* 'Chemistry of the Urine of the Horse,' Proceedings of the Royal 

 Society, vol. xlvi.i 1889. 



f Ellenberger's ' Physiologic' J J bid. 



