592 



INDEX. 



Leaves, the practice of removing fallen 

 leaves in shrubberies con- 

 demned, 543 



ultimately become incapable of 



performing their functions, 79 



Lettuces, how forced, 149 



Liber, 40 



its consistence, 35 



its importance, 46 



its situation, 28 



offices performed by it, 45 



Ligatures for buds, 305 



object of their application, 372 



shouldbeoccasionally loosened, 



311 



Light, absence of, conducive to the for- 

 mation of carbonic acid, 14 



absence of, conducive to the for- 

 mation of roots, 25 



action of, on cuttings hardly m- 



ferior to that of heat, 291 



adjustment of, in the striking of 



cuttings, 289 



' artificial effects of, 64 



by its action on the leaves is a 



principal agent in forming se- 

 cretions, 70 



capability of plants to bear the 



action of, varies according to 

 their specific nature, 79 



coloured, its effects on plants, 300 



its influence on germi- 

 nation, 238 



detrimental to the germination of 



seeds, 14 

 ' its agency in changing the secre- 

 tion of fruit, 100 



its effects on the colour of leaves, 70 



white, the most natural and best 



adapted for plants, 300 

 Lightning, instance of an ash-tree being 



decorticated by, 47 

 Lignification depends on the action of 



leaves, 34 

 Lime, acetate of, rejected by roots, 27 



in its caustic state requires to be 



used with caution, 628 



its effects in assisting germination, 



236 



its value as a manure, 551 



muriate of, its absorbent proper- 



ties, 244 



. proportion of, in raiu-water, 28 



should never be used in conjunc- 

 tion with any nitrogenised sub- 

 stance, 547 



when combined with acids forms 



an important portion in the food 

 of plants, 528, 651 

 Liquid manure, its importance, 433, 572 



Loam, calcareous the best for gardening 

 purposes, 530 

 its composition, 526 



Loddiges, Messrs., mode of packing plants 

 for long voyages, 258 



Lois-Weedon, mode of tillage without 

 manure, 

 540 



the prin- 

 ciple of, 

 541 



— ' practice of removing leaves 



from crops at, 76 



Longevity of plants, 41 

 Lopping, or snag-pruning, 403 



Maolcea aurantiaca, mode of increasing 



by cuttings of its root, 283 

 Macquart's explanation of the cause of 

 the formation of different colours, 110 

 Madden, Dr., on drainage, 169 

 Madder, colouring matter in, experiments 



respecting its formation, 300 

 Magnesia, proportion of, in rain-water, 28 

 Magnetic force has no influence on the 



circulation of the fluids in plants, 9 

 Male flowers in unisexual plants, 107 

 Malt dust as manure, 665 

 Mandirola, F., hia mode of striking orange 



and lemon leaves, 271 — 276 



Manures, amtnoniacal, effect of, 550 



farm-yard, 562 



gas-lime, 553 



gas-water, 575 



liquid, 433, 572 



best adapted for plants in 



pots, 573 



for root-crops and mode 



of application, 579 

 receipts for making, 573 



should be applied weak 



and frequently, 574 



Sir Joseph Paxton's mode 



of treating, 574 



superior to solid, 572 



true principles of apply- 

 ing it, 676 



unfavourable to' the pro- 



duction of flowers, 577 



- maniier of applying, 571 



- mode of tillage without, 540 



- objects and necessity for their 



application, 539 



- sewerage preferable to all others, 



575 



- soluble substances as, 651 



- their action, 572 



- time of their application, 570, 676 

 ■ works on, 543 



Marcett, Dr., experiments by, 8 



