CONTENTS. XTU 



Value of COW dung 285 



2. Plorse manure, analysis of ...... 286 



3. Sheep dung. 4. Hog manure. 5. Night soil . . 287 

 Changes in fermenting dung heaps ..... 288 

 C. Poudrette. 7. Guano, analysis of . . . . . 293 

 8. Pigeons' dung and that of domestic fowls . . . 297 



II. Animal solids — their composition ..... 294 

 1. Horns and hoofs. 2. Nails. 3. Hair . , . .295 



4. Wool. 5. Feathers. 6. Glue. 7. Bones, bone dust and 



soot 296 



HI. Animal and vegetable bodies destitute of nitrogen . . 297 

 1. Soap-boilers' spent lye, composition and use . . . 298 



Sect. 2. Manures consisting of animal salts. 



1. Urine of the cow, composition and value .... 300 



2. Urine of the horse " " .... 300 



3. Human urine ......... 300 



Sect. 3. Manures composed mostly of geine. 



I. Sea weed. — 1. Ribbon weed. 2. Carrageen moss. 3. Rock 

 weed. 4. Eel grass. 5. Sea coral. Preparation and applica- 

 tion of sea weed ......... 303 



II. Peat, swamp muck and pond mud, their comparative value 306 



1. Peat composted with alkalies 306 



2. Peat composted with animal matter .... 308 



3. Peat composted with green manures .... 309 



Sect. 4. Methods of applying manures. 

 1. For cold stiff soils. 2. For light sandy soils . . . 311 

 3. Action of green manures on hoed crops and grain crops 311 



Sect. 5, Saline manures^ or those consisting of inorganic salts. 



I. Salts whose acid contains the elements which nourish plants 312 



1. Nitrates, theory of their action 313 



2, Phosphates. 3. Carbonates, theory of their action . 314 



Theory of the action of lime 315 



Utility of lime in agriculture 317 



Action of ashes, their composition 317 



Peat ashes, leached ashes, white-ash 318 



II. Salts whose acid does not enter into the composition of 

 plants, and whose action is poisonous 319 



