INDEX. 



589 



Gan-eau, M., experiments on the perspi- 

 ration of leaves, 68 



Qsertner's conclusions on muling and 

 hybridising, 490. 498 



Gaseous matters of atmosphere, 529 



substances most important to 



plants, 544 



Gas-lime as a manure, 653 



water as a manure, 575 



Gei'mination, 13, 104 



causes of, 103 



conditions required to pro- 

 duce it in seeds, 14, 247 



■ electrical action in, 15 



influence of coloured light 



on, 238 



interrupted, 228 



is assisted by the absoi-p- 



tion of water, 15 



means of assisting, in seeds 



with very hard integu- 

 ments, 234 



means of promoting it, 233 



requires communication 



with the atmosphere, 14 



requires different degrees 



of heat in different 

 species, 15 



temperature of earth most 



favourable for, 230 



why best effected in the 



absence of light, 14 



Glass, coldness of its surface condenses 

 the enclosed atmospheric va- 

 pour, 207 



experiments showing the rays of 



light that pass through differ- 

 ent coloured, 300 



roofs, their coldness a cause of 



dryness in the state of the in- 

 ternal air, 207 

 Glazed houses, means of applying tem- 

 perature and moisture to the atmos- 

 phere of, 205 

 Glaubers salts as a manure, 557 

 Gooseberry bush, pruning of, 391 

 Grafting, conditions to be observed in, 

 339, 346 



cleft, 32S, 330, 331 



crown, 315, 334 



deceptions practised with re- 

 gard to it; 347 



D'Albret's vaiieties of, 326 



degrees of affinity within which 



the operation may be per- 

 formed, 346 



herbaceous, 321 



herbaceous plants, 332 



induces fructification, 93 



modes of operation, 304, 325 



Grafting, natural, 320 



ooly successful in cases where 



stock and scion are very 



nearly allied, 346 



■ ■ on roots, 350 



pines, 322 



plug, 336 



propagation by, 303 



saddle grafting, 318 



• summer tongue, disadvantage 



of, 325 



use of, 304 



whip, 314 



Grafting-clay, its use and superiority 

 over other plasters, 340 

 its use in preventing eva- 

 poration and affording 

 aqueous food to the 

 scion, 340 



substitute for, 340 



Grafting-wax, composition of, 331 



French, 339 



Grafts that are diseased will continue so, 



480 

 Granulations, formation of, 286, 315, 447 

 Grapes, cause of " shanking," 140 



require a high temperature when 



ripening, 524 

 Grasses, Caldrini's experiments on the 



grafting of, 345 



Greenhouses ought not to be heated at 



night more than to exclude frost, 520 



Greenhouse plants, their exposure to the 



open air in summer not advisable, 435 



Green manure, 568 



experiments relating to, 



569 

 Ground temperature, average of, in au- 

 tumn near Lon- 

 don, 463 



in various parts of 



the world, 156 



natural to certain 



plants, table of, 

 165 



— points on which it 



is necessary to be 

 informed, 164 

 Growing point, 33, 55 

 Growth by night, experiments on, 518 



by the root, 16 



by the stem, 33 



season of, demands water, 164 



without leaves, 74 



Guano, as manure, 563 



Gypsum, its action and rate at which it 



should be used, 551 

 ■ M. Mene's experiments on, 551 



Hair, as manure, 565 



