MANURE. 



i99 



noarly doubled the grass. But upon wheat, sown on clay 

 land, it did no good ; it injured barley, potatoes grew raak 

 and watery, and on turnips the effects were only half as good 

 as mere unfermented dung. The circumstance of the soil 

 in this last case, was probably a deficiency of geine. 



247. The liquid evacuation of the horee is composed, ac- 

 cording to Boussingault, of 



Carbon, 4.4G 



Hydrogen, 0.47 



Oxygen 40 



Nitrogen 1.55 



Salts, 4.51 



Water, 87.61 



Other analysts have found in horse urine, 



Water, . 94. 



Urea, 



Chalk, . 



Carbonate of soda, 



Hippurate of soda, ...... 2.4 



Muriate of potash, ...... .9 



The hippuric acid is not peculiar to the horse. The urine 

 of most herbiverous animals contains hippurate, former!}' 

 called benzoate of soda, its acid having the fragrance of gum 

 benzoin. If man takes benzoic acid, hippuric replaces uric 

 acid in the urine. According to the composition, horse stale, 

 pound for pound, is equal to the value of cow-dung. 

 Sprengel found the urine of sheep to afford, in 1000 lbs., 



Water, 980 



Urea, with some albumen, 28 



Salts of potash, soda, lime, magnesia, with traces 

 of silica, alumina, iron and manganese, . . 12 



.7 

 1.1 



1000 



