Jan.] THE GREEN-HOUSE. 87 
ing rooms over it, as is commonly directed, I disapprove of, such 
being not only an additional and unnecessary expense, but they 
give the building a heavy appearance; on the contrary, all 
pieces of garden architecture ought to display a light, gay, and 
sprightly taste. 
The walls of the back and ends should be carried up three bricks, 
or about two feet three inches thick, the more effectually to keep 
out frost; a furnace ought to be erected outside, either in the back 
wall, or one of the ends as before observed, communicating with 
flues within, ranging in two or three returns along the back wall, 
with only a brick on edge, with the plastering between them and 
the inside; also one flue running along the front and end walls, rais- 
ed wholly above the floor; and as to the front of the building it 
should have as much glass as possible, and a wide glass door 
should be in the middle, both for ornament and entrance, and for 
moving in and out the plants; a small door at the end, for entrance 
in severe weather, will be found of considerable utility. 
The width of the windows for the glass sashes, may be five, or 
six feet, and the piers between them, may be either of timber, six, 
eight, or ten inches wide, according to their height, or if of brick, 
or stone, they must be about two feet wide, sloping both sides of 
each pier inward, that by taking off the angles, a more free admis- 
sion may be given to the rays of the sun: the bottom sashes must 
reach within a foot or eighteen inches of the floor of the 
house, and their top reach within eight or ten inches of the cieling; 
and if brick or stone piers two feet wide, folding shutters may be hung 
inside to fall back against each pier. 
In the modern construction of green-houses, in order to have as 
much glass as possible in front, the piers between the sashes are 
commonly made of good timber, from six to eight or ten inches 
thick, according to their height, so as to admit as great a portion 
of light, and heat of the sun, as may be; and, on the same account, 
one half or one third of the roof, is formed of glass-work, made in 
the manner of hot-bed lights, the remainder being either covered 
with slate or shingles, and tarpolings or very strong canvass fixed on 
rollers, to be let down over the roof-glasses in very severe weather; 
you may also have large canvass cloths upon rollers to let down oc- 
casionally before the windows, or in default of such, you may nail up 
garden mats. 
Let one third of the front side of the roof, for the whole length 
of the house, be formed of glass-work, and the back wall raised, so 
as that a horizontal ceiling may be carried from the upper part of 
these lights to it, which will cause the back half of the roof to be 
somewhat more flat than the front. Ornamental wood work may 
be erected outside, along the top of those lights, to give a light ap- 
pearance to the roof. Or, if the house be small, you may carry the en- 
tire roof with a gentle slope from the front to the back wall, which 
must be made of a proper height for that purpose; one third or one 
half of such roof may be made of glass-work; from the termination 
of which, carry the ceiling on a level to the back part of the house. 
