INDEX. 



Stock and scion, adhere by the mere 

 junction of cellular 

 matter, 344 

 curious instance of ad- 

 hesion in, 343 

 must haye a great si- 

 milarity of constitu- 

 tion, 345 

 Stocks, adaptation of, to soUs, 854 



affect the fruit, 355 



cutting back of, when budded, 311 



when grafted, 339 



heading down, 339 



in some cases promote the early 



bearing and early death of the 

 graft, 358 



necessity of a correspondence in 



growth between their horizontal 

 system and that of the graft or 

 bud, 336 

 selection of, a matter of great im- 

 portance, 349 



their effects in modifying the 



growth of the tree, 304 



their effect on fniotification, 304 



their influence on grafts, 304 



Stomates, 57 



number of, in a square inch of 



. the leaves of various species, 

 , 58 

 - - permit the escape of vapour, 164 

 their number and size propor- 

 tionate to the natural habits 

 of plants, 58 



their positiouand adaptation, 70 



Stopping, its importance, 396 



Stove plants, night temperature for, 520 



Strontian rejected by certain plants, 27 



Structure of flowers, 81 



Style, 81 



Succulency a mark of unhealthiness, 467 



Succulents are best preserved for a long 



voyage by being packed dry, 257 

 M. lyTeumann's mode of treat- 

 ing cuttings of, 294 



their small proportion of 



roots, 26 

 Suckers of the pine-apple, 302 

 Sulphate of soda as a manure, 557 

 Sulphur, 559 



its value as a manure, 560 



Sulphuric acid employed in drying air 



for the preservation of seed, 244 

 Summer pruning prevents excessive 



luxuriance, 377 

 Superphosphate of lime, mode of pre- 

 paring, and way to apply as manure, 558 

 Sun's rays, force of, 127 



scorching effects of, on plants 



growing in water, 164 



Sweden, temperature of, 119 

 Sylvan inarching, 327 

 Syringing, 206 



frozen plants with cold water, 



good effects of, 112, 204 

 newly transplanted trees, 448 



System, horizontal cellular, 35 



one-shift, in cultivation, 442 



perpendicular, of stems, 35 



Tanneb's bark, spent, as manure, 565 

 Tap-root, advantageous sometimes to 



remove, 461 

 Temperature, a difference between that 

 of day and night univer- 

 sal, 514 



alternations of, necessary 



to plants, 114 



Australian night, 516 



average, at Chiswick, 115 



average, at Madras, 115 



borne by seeds, 232 



diurnal variations of, 114 



effects of an unnaturally 



low, 109 



effects of great discrepancy 



in, as regards different 

 portions of a plant, 69 

 effects of its annual alterna- 

 tions, 116 

 effects of its diurnal alter- 

 nations, 114 



effects on pollen, of one 



too low, 241 

 effects ofone too high in hot- 

 houses at night, 208, 518 



effects of one too high on 



plants, 107 



extremes of, to which plants 



are subject when grow- 

 ing, 153 

 high, conjoined with dry- 

 ness, favourable to the 

 formation of fruit, 109 

 high, vrith moisture, favour- 

 able to the production of 

 leavesand branches, 109 



importance of securing a 



properoneforplants, 148 



inutility of mean air, 154 



laws of, with respect to its 



influence on vegetation, 

 113 



limits of, endurable by 



plants, 106 



night must be lower than 



day, 514 



of drained laud, much 



higher than that of un- 

 drained, 138 



