CHAPTER XXII. 



Manuring Its necessity early recognized The objects of 

 Chemical constituents of plants Mucilaginous and fatty 

 fluids Decomposition Liebig^s theory Organic mat- 

 ter Analysis of West Indian Coffee Mineral consti- 

 tuents Analysis of Ceylon plantation Combustible 

 1 constituents Cattle dung Duration of effects Mr. 

 Wilson's opinion Sir Humphrey Davy on fermentation 

 English farmers 7 view Method of making liquid manure 

 Dr Shortt's suggestion Method with pigs Another 

 plan Economizing transit with bulky manures Cul- 

 tivating grass Putting out On flat land On slopes 

 Old method Green vegetation Woody fibres Dead 

 animals Coffee pulp Poonac Bones Castor-oil 

 cake Guano Wood ashes Lime Sal ammoniac 

 Mana grass Ground thatching Ceylon Prize Essays 

 (1875). 



THE absolute dependence of the ultimate success 

 and permanency of crop cultivation upon manuring, 

 has been universally recognized from the earliest 

 times. Xenophon recommends enriching land by 

 applying to it soil from the bottom of rivers 

 and lakes, while the subject has also been enlarged 

 upon by Theophrastus and Cato. Strange to say 

 however, it would appear to have been only within 



