GARDEN STRUCTURES. 



207 



constructed very narrow, the glass being nearly 

 upright, and it was necessary that they should be 

 so, otherwise the trees, which were generally 

 planted against the back wall, would have been 

 too far from the light. Now, however, in first- 

 rate houses they are planted in front and trained 

 to a trellis, about 1 foot from the glass, and 



parallel to it; so that all parts of the tree, so 

 far as the trellis extends, enjoy an equal share 

 of light, and the width of the house does not 

 require to be so limited. A lean-to house (see 

 fig. 268) having a width of 12 feet, and about 

 10 feet height of back wall, will give a length of 

 15 feet for training. This is quite enough of 



Fig. 268.— Section of Vinery (Lean-to). 



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extension for the branches of a vigorous tree, 

 and several years must elapse before the whole 

 of the trellis can be covered. 



For very early forcing, the trees ought to be 

 planted inside; accordingly the front wall of a 

 Peach-house should be on arches, in order that, 

 if planted inside, the roots may have liberty to 

 extend outwards; and the glass should reach as 

 near the ground as possible, whether by the 

 continuous slope of the roof or by upright front 

 lights. 



Cherry-houses. — The form of structure most 

 suitable for forcing Cherries depends on whether 

 the trees are planted against the back wall or 

 in pots. In the former case, the house should be 

 narrow, in order that the branches and leaves of 

 the tree may have the advantage of being near 

 the glass. If the trees are in pots, a wider house 



will be more economical, as it will, as compared 

 with a house of narrow form, contain more plants 

 under the same extent of glass. 



Whatever may be the form of the house, 

 ample ventilation should be provided, for the 

 Cherry requires abundance of air at all times, 

 and more especially at the blossoming season. 

 As it is not necessary to keep the temperature 

 so high as for Vines and Peaches, the difference 

 of expense for heating a span-roofed house for 

 Cherries, as compared with that of a lean-to, will 

 not be great; and as houses constructed in the 

 former manner admit light on all sides, they may 

 be considered very proper for forcing Cherry- 

 trees in pots. To afford head-room over the 

 whole area, the house should be constructed with 

 upright sashes 4 feet high, and these ought to 

 be hinged or made to slide past each other, so 



