44 THE FRUIT GARDEN. 
But to continue the same trees more effectually in health, and in 
a bearing state, some have a double portion of walling and framing 
planted, but more particularly that of the first described fire-heat 
frame, which is sometimes contrived to move or slide along from 
one place to another, for one frame-work and glasses to serve two 
portions of walling, so that being alternately worked, one part one 
year, the other the year after, each portion of trees will have a 
year of rest in their natural growth, and will succeed each other in 
due order for forcing, whereby the health and vigour of the trees 
will be better supported, and each year a greater crop of fruit may 
be expected, than if the same trees were successively forced every 
year. 
Hot Walls. 
Hot walls are ranges of brick or stone walling faced with glass, 
generally running due east and west, fronting the south and enclos- 
ing a space of several feet width, furnished with internal fire-flues, 
&c. wholly for forcing fruit trees to early production. But as hot 
walls and forcing-houses are nearly similar in their construction, use, 
and general management, to forcing-frames, reference should be 
had to that article for their general explanation. 
Vineries. 
Various buildings have been contrived, to effect the ripening of 
the more choice kinds of late grapes, which cannot be effected in 
the open ground, as likewise to force the earlier sorts, so as to have 
them fit for the table in May, June, and July. The constructions 
of these kinds of buildings are different, though all answering 
the same purpose: some are constructed with flues ranging within 
the wall where the vines are trained up; but as the vines would 
receive more heat at times by being closer to the wall than is pro- 
per, a lattice work is generally detached therefrom, to which the 
branches are trained, and the whole is covered with a range of 
sloping glass; but, the more common method is, to train them 
under the sloping glasses of the hot-house, or other similarly con- 
structed stoves, or forcing-frames; in such places the vines are 
generally planted close to the outside, and introduced through 
holes contrived for the purpose in the upright timbers of the front- 
lights, as low down as can conveniently be done. 
In some vineries the vines are planted near the front, in the in- 
side, and trained up to neat trellis's made for that purpose close un- 
der the roof or sloping glasses. 
SOUTHERN STATES. 
In the southern states, especially such of them as have not se- 
vere winter frosts, you may plant apple, pear, peach, nectarine, apri- 
cot, cherry, and plum trees, both for espaliers and standards: plant 
