18 INOKGANIC SALTS. 



up, and we find, in the urine, the bases with which they 

 were originally combined existing as carbonates in the urine, 

 rendering it neutral or alkaline. It is to the amount of such 

 organic salts, in the food of the herbivora, that we must 

 attribute the alkalinity of their urine, and the large per-cen- 

 tage of carbonates which it contains. 



Vauquelin found that 1 000 parts of the urine of the dog 

 contained 18*44 parts of inorganic salts, consisting of 5*95 

 parts of chlorides, 6*87 of sulphates, and 5*59 of alkaline and 

 earthy phosphates, besides 0*03 of silica, 



Fig. 160. Crystals of Triple Phosphate, Fig. 161. Crystals of Carbonate of 



showing their form. Lime, seen by reflected light. 



Von Bibra found that 1000 parts of the urine of a horse 

 contained 42*20 parts of salts, which contained 78:37 per 

 cent, of carbonates of lime, magnesia, potash, and soda, 1 3'04 

 per cent, of sulphate of potash, 6 '94 of chloride of sodium, 

 and 0*55 of silica. 



. In 100 parts of saline residue there were 



Carbonate of lime, . ' . 12*50 31-00 



Carbonate of magnesia, . . . 9*46 1 3'07 



Carbonate of potash, ; . 46'09 ) 



Carbonate of soda, . . . 10*33 ) 40 ' 83 



Sulphate of potash, . . . 13*04 9*02 



Chloride of sodium, . . . 6*94 5*60 



Silica, . . . 0*55 1 



Loss, 1*09 1 



The deposit which settled, on allowing the urine of the 



