142 MANURE. 



percent. Night soil, including that of the hog con- 

 tains, per 100 parts, 



Geine, 23* 



Salts, 1-2 



Carbonate of ammonia, 15*32 



No analysis has yet been made of hog manure, 

 but in its characters it approaches night soil suffi- 

 ciently, to be ranked with it, for the present pur- 

 pose. Sheep dung probably is in this class. 



206. Thus the three most common substances, 

 used for manure, cow, horse and hog dung, includ- 

 ing night soil, are reduced to geine, salts and carbon- 

 ate of ammonia, or nitrogen, its equivalent. It need 

 not be said, that the experience of ages, has proved 

 that these three varieties of manure, possess very dif- 

 ferent fertilizing properties. These depend not on 

 the salts alone, whose amount and quality is nearly 

 the same in all. Nor on the geine, for that is near- 

 ly the same in human and horse excrement. Their 

 fertilizing power then, depends not, as has been as- 

 serted, on the salts which would render their agricul- 

 tural value equal. All experience would prove such 

 an assertion unfounded. But it is said that their rela- 

 tive value, depends on their nitrogen, or their power 

 of producing ammonia. 



