682 



INDEX. 



Aqueous matter, neceasity of its excess 

 being decomposed during the progress 

 of ripening, 167 

 Aqueous pariiioles in plants, effect of 



their being frozen, 113 

 Araucaria seeds, mode of packing, 251 

 Arid regions, 608 

 Arsenic, its effects on plants, 8 

 Ashes, vegetable or wood, as manure, 



655 

 Ash-tree decorticated by lightning, 46 

 ■ -remarkable instance of an in- 

 scription found in the interior 

 of one, 33 

 Asparagus, importance of salting, 556 

 Atmosphere, a very dry, induces the 

 formation of flowers and 

 fruit, 512 



■ gaseous matters of, 529 



mean temperature of, rela- 

 tion it bears to that of 

 the earth, 130 



of hothouses, importance of 



being damp, 210 



' of rooms not deteriorated 



by plants, 61 



temperature of, at various 



places, 117-125 



unfavourable state of, a cause 



of sterility in flowers, 240 

 Atmospheric dryness or moisture, ex- 

 tremes of, 188, 189 



moisture, 177 



Australia, temperature of, 123 



night temperature o^ 616 



Axil, 43 



Axils of leaves, the situation where leaf- 

 buds are formed, 44 

 Azaleas, injury to, when permitted to 

 ripen their seed, 98 



instance of striking cuttings of, 



in water, 293 

 Azote, 23, 547 



Balloon training, 426 



Bark, 42 



' instance of its power of reparation 



by superficial increase, 37 



its absorbent property, 18 



its anatomical relation to leaves, 56 



its distinct parts in trees and shrubs, 



39 



its production, 35 



unaided by leaves, 



38 

 its rind and epidermis in some cases 



perform the office of leaves, 69 



of the root, its office, 18 



performs the functions of leaves in 



"leafless "plants, 34 



Bark, superiority of fast-grown to slow- 

 grown for tanning purposes, 417 



when wounded or out, converges 



from all parts to repair the 

 injury, 37 



Bablow, Professor, his experiments on 



the strength of oak timber, 419 

 Barral, M., experiments on rain-water, 28 

 Barrenness, cause of, 369 

 Bastardising happens more frequently to 

 single plants than to large masses, 468 

 Bedewing, its importance, 206 

 Beet-root, singular instance of grafting 



red and white, 343 

 Bell-glasses, evil arising from the air 

 Burroimding them being 

 cold, 293 



maintain a steady saturated 



atmosphere around cut- 

 tings, 296 



of different colours, 299 



their action, 293 



their use in propagating, 



278, 292, 299 

 Bigeneric muling, apocryphal, 497 

 Birch-tree, remarkable instance of one 

 growing out of the decayed trunk of 

 an old cherry-tree, 349 

 Blackeniag garden walls, doubtful effects 



of, 199 

 Bleeding, 50 



■ cause of, 51 



— — - — causes incurable debility or 

 death, 50 



■ materially influenced by the 



state of the weather, 50 



■ necessity of guardiog against 



in pruning, 363 

 remedies for, 364 



Blood as manure, 564 

 Blossom-buds analogous to leaf-buds in 

 the first stage of their organisation, 92 

 Blue BUly as manure, 563 

 Bones as manure, 667 



time for applying, 671 



Borders, artificially warming of, 142 



cold, the cause of "shanking," 



140 



concreting of, 146 



formation of, for fruit-trees, 631 



for vines, 146 



Bottom-heat, 134 



amount required by plants 



varies with the species, 

 135 



a proper degree of, the 



fundamental requisite 

 in the striking of cut- 

 tings, 291 



