338 



INDEX. 



Glass should be double, 237 



why best to be used, 207 



Golden pippin, 332 



renate, 332 



Gooseberries, to grow large, 238 

 Grafting, 176 



— to hasten fertility, 158 



wax, 175 



■ not done indiscriminately, 



177 



by the ancients, 177 



■ on different organs 187 



does it prolong life? 331 



Grapes, shanking in, 298 



thinning, 312 



Grasses for sands, 68 



Gravitation does not guide roots, ii 



Grew, 4 



Groundsel, 13 



Growing time of plants, 164 



Gum, 94 



its components, 215 



Gypsum, 81, 96 



Habits, plants acquire, 318 

 Hawthorn seed, 15 

 Heading down, its effects, 170 

 Heat, effects of its excess, 13, 315, 



320, 325 

 • effects of its reduction, 325 



endured bj^ plants, 142, 320 



plants have the power to 



exclude, 321 



plants produce, 324 



its radiation, 218 



required for germination, 13 



-ripeningfruit, 218 



the agent to arouse life, 16 



Heaths, 116 



Hedysarum gyrans, 105 



Height of plants, how influenced, 



132 

 Helleborus niger, 189 

 Hide-bound, 126 

 Hilum of seed, 42 



Hoeing, 58, 64 

 Honey-dew, 303 

 Horse chestnut, 317 

 Hot-beds, cause of their heat, 329 

 Hot-houses, proper angle for their 

 glass, 235 



why needed, 225 



their ventilation, 145 



Hot water for heating, 228 



House plants, when to put out, 29 



Humic acid, 330 



Humus, 329 



Hunt's pots, 72 



Hyacinth, 318 



Hybridizing, 195 



influence of parents 



in, 196 



modes of, 197 



Hybrids, parents of some, 204 

 Hydro-sulphuret of lime as a 

 remedy, 273 



Impregnation, 191 



symptoms of, 199 



■ produces heat, 324 



Inarching, 178 



Insects aid impregnation, 193 



to destroy,^ 108, 128 



Iron in soils, See, 81 

 Ivy injures trees, 130 



Japan plants will endure our 

 climate, 316 



Kidney beans, 9. 



rule for sowing, 25 



Knight (T. A.). 2,6,308 

 Knot-grass, 119 

 Lavoisier, 6 

 Leafing, time of, 27 

 Leaves, 135 



absorb moisture, 144 



cause of colour, 135 



influence of light on, 135 



their functions, 136 



