92 MANURES. 



the pile. The organic part of the manure having 

 been burned away, nothing but the ash remains, 

 this is called fire-fanging. 



Manures kept in cellars without being mixed with 

 refuse matter are subject to some loss by evaporation 

 unless they are so situated as to absorb the urine, 

 when they are less likely to become injuriously heated. 



When kept in the yard, they are much more liable 

 to loss from excessive evaporation. They are here 

 often saturated with the water of rains, which, in its 

 evaporation, carries away ammonia and carbonic acid 

 which it has obtained from the rotting mass. The 

 ovaporation of the water is rapidly carried on, on 

 account of the great extent of surface. The whole 

 mass is spongy, and soaks the liquids up from below 

 (through hollow straws, etc.), to be evaporated at the 

 surface on the same principle as causes the wick of a 

 lamp to draw up the oil to supply fuel for the flame. 



LIQUID MANURE containing large quantities of 

 nitrogen, and forming much ammonia, is also liable 

 to lose all of its organic parts from evaporation (and 

 fermentation), so that it is rendered as much less 

 valuable as is the solid dung. 



From these remarks, it may be justly inferred that 

 a very large portion of the value of solid and liquid 

 manure may be lost by evaporation in a sufficient 

 length of time, depending on circumstances, whether 

 it be a few months or several years. The wasting 

 commences as soon as the manure is dropped, and 

 continues, except in very cold weather, until the 

 destruction is complete. Hence we see that true 



