REQ 



500 



RH A 



can be made either to ascend the chim- 

 ney at once, or to pass round the house. 



Fiff. 145. 



The next sketch is a Pinery, 

 up with Mr. Rendle's tank. 



Fig. 146. 



fitted 



It is described as " a very useful and 

 most desirable structure for the growth 

 of the Pine Apple, with a hollow wall, 

 recommended by all garden architects 

 in preference to a solid wall — the heat 

 or cold being not so readily conducted 

 as through a solid mass of masonry." 

 Mr. Rendle might have added, that 

 hollow walls are also much drier. — 

 Rendle's Treatise on the Tank Systetn. 

 See Stove, &c. 



REQVIENIA obcardata. Stove ever- 

 green shrub. Young cuttings. Peat, 

 loam, and sand. 



RESEDA. Mignonette. Seventeen 

 species. Chiefly hardy annuals, bien- 

 nials, herbaceous perennials, and a few 

 green-house evergreens. Cuttings or 

 seeds. Light rich soil. See Mignon- 

 ette. 



perature, and the least degree of light 

 compatible with healthy growth must 

 be secured ; and to this end plants for 

 succession are often placed on the 

 north side of a wall. 



Then again, as in the case o^ rasp- 

 berries and strawberries, plants are 

 often cutdown in the spring, compelling 

 them to form fresh foliage and stems, 

 and thus be productive in the autumn 

 instead of the summer. 



The vegetation of many bulbs may 

 be prevented by merely keeping them 

 dry, and, indeed, the withholding the 

 usual supply of water, giving it only in 

 diminished quantities, is necessary in 

 all retarding treatment. To secure the 

 entire quiescence of bulbs, and of sucli 

 plants as will bear so low a tempera- 

 ture, the atmosphere of the ice-house 

 is effectual ; and to this end it should 

 have a few shelves for the support of 

 boxes or flower pots. Banks o^ earth 

 ranging east and west, and facing the 

 north at a very acute angle, are very 

 useful in retarding the early advance to 

 seed in hot weather, of spinach, let- 

 tuces, &c. Espaliers ranging similarly, 

 and shaded during the whole of March, 

 and the two following months, will 

 blossom later and more unfailingly than 

 trees more exposed to the sun in spring. 

 Similar exclusion of heat and light re- 

 tards the ripening of picked fruit, and 

 if the air be excluded from them, or 

 its oxygen withdrawn, fruit will remain 

 unripened for weeks. To efl'cct this, 

 put a paste formed of lime, sulphate of 

 iron, and water, at the bottom of a 

 wide-mouthed glass bottle, then a layer 

 of large pebbles to keep the fruit from 

 the paste, — then fill the bottle with 

 peaches, apricots, or plums, gathered 

 a few days before they are ripe, cork 

 the bottle tight, and cover the cork 

 with melted resin. They have been 

 thus kept for a month, and summer 

 apples and pears for three months. 

 They ripen when again exposed to the 

 air. 



RHAMNUS. Thirty-eight species. 

 Chiefly hardy evergreen, or deciduous 

 shrubs, or trees. Layers, seeds. Com- 

 mon soil. The few stove and green- 



RETARDING requires as much skil 

 as forcing, for as the latter requires the : house kinds, increase by cuttings; and 

 application of all that is suitable to the • require a light soil, 

 promotion of a plant's rapid healthy ! RHAPIS. Two species. Dwarfish 

 growth, so retarding requires the with- palms. Suckers. Sandy loam, 

 holding from it of those contingencies, i RHAPONTICA. Four species. 

 Thus to retard growth, the lowest tein- , Hardy herbaceous perennials, except 



