At the lower end of the garden, a space is shown, walled off, in which pines and melons may be grown in pits, either heated by dung or by hot water; and here, also, cucumbers, and roses and other flowers, and rhubarb and other culinary articles, may be forced at pleasure. One fire-place and boiler, centrally placed, will, with ease, heat all these pits and frames, even if they were of three or four times the extent we have supposed them to be. Plans for such pits will be given hereafter. In the ground plan, fig. 49., the boiler is supposed to be placed beneath the green-house (e); and pipes conducted from it, as indicated by the dotted line, will pass through and heat the vinery (d), the general forcing-house, or stove (e), the small pit (h), the propagating box (g), and the pine pit (f). There is a place for compost at t, and a potting-shed at k The long bed (l) in front of the houses is supposed to be in turf, or devoted to exotic flowers and shrubs kept in the forcing-house and vinery in the winter season, and turned out during summer. The enclosure containing the pits will also serve for a reserve ground for bringing forward articles proper for decorating the green-house, and for containing soils, composts, pots, and various articles.

The potting-shed is used for shifting and potting in, and for other operations required to be performed with house plants; and also for containing the pots, tools, etc. Without an appendage of this kind, no greenhouse can ever be made to look well for any length of time together; for some of the plants require to be removed as soon as they have left off flowering on account of their unsightliness; others become too large and straggling; some get diseased, and others die altogether; so that a reserve ground, with a pit or frame in it, is absolutely necessary, as an hospital, to renovate plants that are sickly or unsightly; as a receptacle for such as are in a dormant state; and as a nursery to raise young ones, in order to keep up a fresh supply of plants in full vigour.