MANURE. 141 



dung, and the salts, which are mostly phosphates of 

 lime, magnesia, and soda, are about the same. If 

 the nitrogen is regarded, it is found about 50 per 

 cent, greater, than in cow dung. Hence during the 

 chemical actions of the production of ammonia and 

 nitrates, if the heat is in proportion to that action, 

 we may possibly assign a reason, why horse dung is 

 a hotter manure than cow dung. The nitrogen in 

 horse dung is about 3-4 of one per cent., or, this 

 manure contains, in 100 parts, 



Geine, 27* 



Salts, -96 



Carbonate of ammonia, 3*24 



205. Hog manure and night soil. These may be 

 both arranged under one head. Taking night soil 

 in its purest state, its composition may be thus 

 stated, — 



Water, 75-3 



Geine, 23*5 



Salts, 1-2 



These salts are nearly 3-4 of the whole composed 



of carbonate, muriate and sulphate of soda. The 



remainder being composed of phosphates of lime and 



magnesia ; the last is particularly abundant in night 



soil. Its average quantity of nitrogen, is about 3 1-4 



