GREENHOUSE. 



145 



GREENHOUSE. 



or front part at all. In order to 

 admit of ventilation, the front sashes 

 should open outwards, or slide along 

 a groove ; and the roof-sashes should 

 also open by sliding the one over the 

 other. Other minor details need 

 not be here entered into, as they 

 are perfectly understood by all con- 

 structors of greenhouses, whether 

 of wood or iron. With respect to 

 these two materials, iron admits of 

 the greatest variety of shape, such 

 as a cui'vilinear ground plan and 

 roof, and it also admits most light ; 

 but the construction in wood 

 most generally understood, and 

 rather the cheapest. Veryexcellent 

 and ornamental greenhouses are 

 constructed in iron, and wooden 



FIG. 27. — GREENHOUSE AND VINERY 

 OUTSIDE. 



houses may be made by any carpen- 

 ter or joiner. A portable gi'een- 

 house has lately been constructed 

 to place over plants in the open air, 

 and which consists of a stand or 

 frame in which some sash frames 

 are fixed, so as to cover a sloping 

 trellis below, over which some tender 

 or half-hardy ornamental climbers 

 are trained. This apparatus can 

 be put up at a very trifling expense, 

 as glass is now very cheap, and as 

 the frame may be made of wood 

 rough from the saw. 



The simplest kind of greenhouse 

 is one only heated by manure, 

 which, with the shelter afforded bv 



the glass, is sufficient to grow grapes, 

 and to force flowers, so as to have 

 roses and lilacs, &c., at Christmas. 



-GREENHOUSE AND VINERY 

 INSIDE. 



The outer appearance of this house 

 is very plain (see fig. 27) ; and it 

 may be constructed at very little 

 expense. There is a wall in front 

 (shown at c in fig, 28), within 

 which a dung bed is formed, into 



FIG. 29.— A SMALL GREENHOUSE. 



which the plants to be forced {d) 

 are plunged. Inside the back wall 

 are trained peach and nectarine 

 trees, or vines ; and on the outside, 

 vines, or cherry trees. Part of the 



