MANURES. 34:1 



This is an average of three analyses copied from Prof. 

 Geo. EL Cook's Eeport of the Geology of New Jersey. 

 According to this estimate one ton (2000 Ibs.) of green 

 sand marl contains 



Lime 106 Ibs. 



Magnesia 32 " 



Potash . 96 " 



Soluble silicic acid. 648 Ibs. 



Sulphuric acid 12 " 



Phosphoric acid* ... 26 " 



To give a better idea of the formation and composition 

 of stable manure, the following is copied from " Waring's 

 Elements of Agriculture " : 



"DIGESTION AND ITS PRODUCTS. 



" Let us suppose that we have a full-grown ox, which is 

 not increasing in any of his parts, but only consumes food 

 to keep up his respiration, and to supply the natural wastes 

 of his body. To this ox we will feed a ton of hay which 

 contains organic matter, with and without nitrogen, and 

 soluble and insoluble earthy substances. Now let us try 

 to follow the food through its changes in the animal, and 

 see what becomes of it. Liebig compares the consumption 

 of food by animals to the imperfect burning of wood in a 

 stove, where a portion of the fuel is resolved into gases 

 and ashes (that is, it is completely burned), and another 

 portion, which is not thoroughly burned, passes off as soot. 

 In the animal action in question, the food undergoes 

 changes which are similar to this burning of wood. A 

 part of the food is digested and taken up by the blood, 



* Equal to phosphate of lime 56^ Ibs. 



