MANURE. 



133 



179. And first, for the choice of some substance which 

 shall form the type of manures, and be considered the stand- 

 ard of value. Let it be pure, fresh fallen cow-dung. What 

 is its composition 1 Water, hay, and bile, with a few salts. 

 The author has repeatedly analyzed this form of the food of 

 plants, and it is found that the water is a very uniform quan- 

 tity at all seasons and with various food. Others have found 

 a few per cent, less than that which will be here stated ; 

 while some late and distinguished German chemists have 

 given results agreeing with this statement, within a fraction 

 of one per cent. 



180. The proportions of organic matter, salts and water, 

 in 100 lbs. of cow-dung, are — 



Water, . . " . . . . . . 83.600 



Organic 

 Matter. 



Salts. 



100.000 



181. 100 parts of cow-dung by Morin's analysis, consist of 



Water, 70.00 



Vegetable fibre, 24.08 



