RED 



499 



REN 



RED NIGHTSHADE. Erica Hali- in tan and labour is also very grest ; 

 cacaba. in some places tan is expensive, and 



RED SPIDER. See Acarus. \ where it is cheaper, the trouble and 



REEDS. See Shelter. ; litter incident to its emiiloyinent, and 



REEV'ESIAr/i!/7-so(rfea. Green-house the dangers of loss from fungi and in- 

 evergreen shrub. Ripe cuttings, with sects, of which it is the peculiarly 

 the leaves. Light turfy loam, or loam ; fertile foster-parent, render it objec- 

 and peat. i tionable as a source of heat. And 



R EH M AN fs I A chinensis. Hardy Whenever the tan has to be renewed, 

 herbaceous perennial, but it succeeds the trouble and destruction of plants is 

 best in a cool green-bouse. Cuttings, always great. 

 Common soil. I "In my new propagating house," 



REICH A RBI A hexapetala. Stove says Mr. Rendle, " the tank or cistern 

 evergreen shrub. Cuttings. Rich soil ! is placed in the centre, with a walk 

 and a strong heat. I surrounding it, so as to enable the 



RELHANIA. Five species. Green- ^ propagator with greater ease to attend 

 house evergreen shrubs. Cuttings. I to the plants, &c. 

 Loamy soil. 



RENANTHERA 

 Stove orchids. Cuttings 



'On the outside of the bouse is a 

 Three species, j fire-shed, in which the boiler is fixed. 

 I'eat mixed I The tank, made of wood, one and a 

 vith broken potsherds, moss, or wood, half or two inches thick, which I find 

 RENDLE'S TANK SYSTEM. First' the cheapest material, (it also prevents 

 suggested, I believe, by Mr. Rendle, | the water cooling so fast as it does 

 nurseryman, of Plymouth. I have given, I either in stone or iron,) may be lined 

 in the customary monthly calendars, the ' with lead or zinc. Exactly in the cen- 

 necessary intimations when the bark- j tre of the tank is a partition, serving 

 beds will probably require stirring, but ' the double purpose of causing the water 

 those troublesome, uncertain, and dan-! to circulate, (as well as to support the 

 gerous operations, dangerous to the edges of the slates,) an aperture being 

 plants, are entirely rendered needless ' left in the partition, of about two inches 

 by Mr. Rcndlc's plan. It has been i in breadth, to allow the water a free 

 adopted by some of the best practical j passage. The flow-pipe enters near 



gardeners with entire satisfaction. 



the appendage of the tank, at the mouth 



A tank of iron or wood, twenty feet of which pi()e a ])iece of perforated 

 long, five feet broad, and six inches, copper is placed, as also at the return- 

 deep, is constructed in the centre of pipe, to prevent dirt and sediment from 

 the house, and surrounded by a walk, finding its w-ay into the boiler. After 

 except at the end, where the boiler is everything is properly fixed, the tank 

 fixed for heating it. The top of the is filled with water, which, of course, 



tank is covered with large slabs of at the same time fills the boiler 



slate, cemented together, to prevent The tank is about four inches deep, 

 the excessive escape of steam. Around Across it, and resting on its sides, are 

 this is a frame sufficiently high to re- placed slate stones about an inch and a 



tain the bark, in which the pots are 

 plunged. The boiler and tank are 

 filled with water, and this circulates, 

 when the fire is lighted under the 

 former, by means of two pipes, one 

 from the top of the boiler, and the 



half thick, cut square at the edges. 

 These are fistened to each other bv 

 Roman cement, or Aberthaw lime, to 

 prevent a superfluity of steam from 



escaping into the house Around 



the edges of the slates a piece of inch 



other returning nearer to its bottom, board, about nine inches deep, should 

 The expense of piping, and danger of be placed to enclose the sawdust, sand, 

 their freezing, is avoided ; the fire only moss, or other plunging material. 



requires to be kept lighted for two 

 hours at night, and again for the same 



In the following sketch, for which, 

 as well as for the next, I am indebted 



period in the morning; the water, to Mr. Rendle, ^4 is a transverse see- 



when once heated, retaining its tem- 

 perature for a long time. In a small 

 house, the apparatus can be constructed 

 for 5/., and in all, for less than half the 



tion of Rogers's conical boiler; B is 

 the fireplace ; g, the tank : c, the flow- 

 pipe; d, the pif)e by which the water 

 returns to the boiler; e, is the hole for 



cost of hot-water pipes. The saving the smoke, which, joined to aflue, /, 



