BY MIXED MANURES. 285 



Morin's analysis is very similar. Thus 100 parts consist of 



Peculiar extractive matter 1.60 

 Albumen 0.40 



Biliary resin 1.80 



Water 70. 



Vegetable fibre 24.08 



Green resin and fat acids 1.52 

 Undecomposed biliary matt. 60 



lOO.Oi) 



Others have given analyses varying somewhat from either of 

 the above. In all cases there is from 70 to 85 per cent, of 

 water, which of course is of no more value than any other 

 water. By Dana's analysis a little less than one-sixth 

 part consists of vegetable matter and salts. By other analy- 

 ses, a little more than one-fourth is vegetable matter. A large 

 portion of the vegetable matter is hay, bruised and deprived 

 of a part of its gum and albumen. But by passing through 

 the animal organs, the chopped hay has a greater tendency 

 to decay than common hay. The living power has exerted 

 a catalytic force, and the elements are disposed to separate ; 

 hence, nearly the whole soon becomes humus or geine. When 

 subjected to ultimate analysis, 100 parts of cow dung are 

 composed of the following organic elements. 



Nitrogen .506 i Hydrogen .824 



Carbon .204 I Oxygen 4.818 



The absolute value of this manure will not depend upon 

 the quantity of these four substances, which it is capable of 

 yielding to plants, but upon the quantity of geine, ammoniacal 

 and other salts. The relative value will depend upon the 

 proportion of nitrogen, or the quantity of ammonia which it is 

 capable of forming. All manures may be estimated in a 

 similar manner. This quantity of ammonia may be deter- 

 mined with some degree of accuracy from the known quan- 

 tity of nitrogen ; for 14 parts of nitrogen and 3 of hydrogen 

 combine to form 17 of ammonia. From these data, 100 lbs. 

 of cow dung will yield 0.614 or about five-eighths of a pound 

 of ammonia. This is generally combined with carbonic acid, 

 and would make about 2 lbs. and 2 oz. of the carbonate of 

 ammonia, which is known as salts of hartshorn. 

 24* 



