INDEX. 



331 



Dew 51 



Decomposition of matter 15 



Ditches, size of 169 



Drains, materials for 170 



" how made 171 



Draining land 167 



Diastaste, effect upon starch 236 



Earth, the, formation of. 120 



" the early history of 121 



Electricity, produces nitric ac- 

 id in the air 68 



Elements, inorganic 93 



" organic 16 



Elementary bodies 14 



Embryo of plants, formation of 255 



Evaporation, absorption of heat by 57 

 ' ' of water from soils. .134-138 

 " of water from plants. ..248 

 Exhaustion of soils, how pro- 

 duced 272 



Fallowing, summer, effects of 188 



Farm Crops, culture of 271 



Feeding substances, composit'n of.105 



Feldspar, composition of 125 



Fertilizing matter in green man- 

 ures 206 



Fertility, amount of in the soil 273 



' ' how exhausted 275 



Filament of the flower 254 



Fish scrap, as manure 230 



Flax, cultivation of 310 



Flowers, the production of. 253 



parts of. 253 



Forms of matter 12 



Fodder crops 286 



Freezing mixtures '. 58 



" in cellars, how prevented.. 58 



Fructification, the process of. 255 



Fruit, the, its formation and 

 character 258 



G 



Germ, the, of the seed 256 



Germination of seeds 236 



" changes produced by..258 



Grass, importance of 159 



' ' growth of under irrigation.,159 



" cultivation of. 282 



Grasses, mixed for different soiLs...284 



Green manuring 203 



results of 204 



Green manuring, plants for ..205 



Green crops, for manure, compo- 

 sition of 206 



Green crops, for manure, how 



used 207 



Grain crops, cultivation of 293 



Granite, composition of 124 



" soils formed from 124 



Guano, as a fertilizer > 



Gum, composition of 237 



Gypsum 217 



" composition of. 113 



H 



Harrow, Acme pulverizing 186 



Harrows, kinds in use 185 



Harrowing, effects upon the soil. ..184 



" losses by defective 185 



" necessity for perfect. ..276 

 Heat, influence upon vegetation... 52 



" what it is 53 



" force of 53-55 



" absorbed by water 54 



Hemp, cultivation of 311 



Hops, cultivation of. 317 



" composition of 318 



Hornblende, composition of. 126 



Humus 19 



Hybridizing plants 266 



Hydrogen, its properties 28 



weight of. 28 



its compounds 29 



I 



Improvement of plants by cross'g...264 

 Inorganic elements, comp'dsof....!07 

 Irrigation, value of 158 



" of crops 173 



methods of 174 



" work on 176 



K 

 Kainite 220 



Laws of plant growth 97-196 



Leaves, functions of 249 



" pores of 250 



" absorb carbonic acid 2T.1 



Leather scraps, as manure '-:;ii 



Lime, how made 112 



' a constituent of plants 112 



" its compounds 113 



" effects of in soils 166 



" in composts 211 



" as a manure 214 



