124 
JOURNAL OF THE ROtAL HORTICULTURAL SOCIETY. 
structures, provided that, if the Roses are to be planted in the 
ground, the lights or sashes forming the roof are movable and 
can be taken off at a time hereafter stated ; but there can be no 
doubt that the structure best adapted for the purpose is a span- 
roofed house, and I will endeavour to describe the construction 
of one of this kind of a moderate size, which may be enlarged or 
diminished at the will of the builder. 
In the first place it may be regarded as an axiom that the 
two ends of the house should face respectively north and south, 
so as to reap the advantage of morning and afternoon sun, and 
at the same time diminish the excess of heat in the middle of 
the day when the sun bears the greatest power. 
As an illustration, I will presume that it is desired to build 
a house for Eoses, 24 feet in length by 14 feet in width, inside 
measurement. This is by no means a large house, and should 
not be very costly. In the centre may be formed a bed 7 feet 
wide, with a path round it 1^ foot wide, which will leave room 
for a border between the path and the walls 2 feet wide. By this 
arrangement the centre bed may be planted with Standard and 
Half- standard Teas, whilst the borders may bo filled with dwarf 
Hybrid Perpetuals to give colour which is not obtainable amongst 
the Teas. 
In each corner may be planted one good climbing Rose, such 
as Marcchal Niel, W. A. Richardson, Climbing Niphetos, L'Idcal, 
Solfaterrc, or any others desired to train thinly under the roof ; 
but it must be thoroughly understood that the four climbers 
must not be allowed to grow so densely as to obscure the light 
from those growing beneath them : this can be easily guarded 
against by careful and judicious pruning and training. 
In addition to the climbers planted in the corners, there may 
be two more planted close to the uprights in the centre of the 
house, which form supports to the ridge hereafter described. 
The height from the ground to the ridge should be 9 or 10 feet, 
and from the ground to the eaves 3 feet 0 inches, including 2 feet 
of 4], -inch or 9-inch brickwork and 1 foot 0 inches of side-lights, 
which should be made to open the entire length of the house for 
ventilation. Of course top ventilation is indispensable, and it is 
desirable tliat the ventilators on the roof should be continuous 
the whole lengili and on botli sides. This is better than having 
ventilating lights at intervals ; but more particularly does this 
