332 FORCING GARDEN. 
these dimensions may be varied considerably, according to 
the time at which the crop is desired to come in. Fot 
early forcing, perhaps twenty-five or thirty feet in length, 
and seven or eight in breadth, are sufficient; while a house 
in which the operations of nature are only to be slightly 
accelerated may be extended to fifty feet. As in the 
vinery, the fruit wall is arched, to permit the egress of the 
roots to the neighboring border. Upon this front wall is 
usually placed a range of upright sashes, which are sur- 
mounted by the sloping rafters of the roof. A common 
form of a peach-house is annexed, the upper figure showing 
the vertical section, and the under one the ground plan; 
a, a are the flues, 6 is the table trellis, ¢ the trellis on the 
back wall; along with which a hanging trellis, represented 
at p. 327, is sometimes employed, although this is not 
approved of by many. The flue, which is built on pillars 
and returns on itself, occupies the centre of the house. 
The trees are trained to the two trellises 6 and c, and to 
the hanging trellis, if such be in use. Against the back 
wall three or four dwarf trees are planted, with interme- 
diate riders, the latter being altogether removed at the end 
of four or five years at furthest. These, with three for 
the front trellis, make in all nine or ten trees for each 
house. 
The figure on page 334 represents another form of the 
peach-house, not so generally used as the former, but of 
equal if not superior merit. We have supposed it heated 
by a water apparatus a, a, but that is not an essential 
matter, as 2 common flue is equally applicable. There is 
no upright front glass, nor any trellis on the back wall, 
the trees being planted in front, and trained on a wire 
trellis 6, attached to the rafters, and covering the whole 
surface of the sloping roof. As the peach: tree is: not 
