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the cow, the latter are preferred by the far- 

 mers as being more serviceable ; for as horse 

 dung is less humid, it ferments and dries ra- 

 pidly if it is not wetted and heaped up so as to 

 prevent the action of the air. During this 

 fermentation, a considerable proportion of ni- 

 trogenous principles are dissipated, and hence 

 a depreciation of the value of the manure. 

 The 2.7 per cent, of nitrogen which the fresh 

 dung actually contains, is by a complete de- 

 composition reduced to one per cent. 



Horse dung is appropriate to all soils ; in a 

 dry state it contains, as we have said, 2.7 per 

 cent, of nitrogen ; when moist, only 0.65 per 

 cent. 



Cattle Dung. This manure is much more 

 aqueous than the preceding, particularly when 

 the cattle are in pasture. Its preparation is 

 very easy. Cow dung in a dry state contains 

 2.6 of nitrogen ; when moist, 0.36, only. 



Hog Dung. Fattened hogs drop very ni- 

 trogenous excrements, which consequently 

 are more energetic than the preceding. In a 

 dry state, their faeces contain 3.4 nitrogen ; 

 when humid, 0.61 only. 



Sheep Dung. A very energetic manure, 

 but slightly aqueous, and frequently used 



