90 THE GREEN-HOUSE. [Jan. 
stage— which will be found very convenient for watering as well as 
for common access to the highest and most remote plants; and 
also to place thereon, near the back wall, pots and tubs of deciduous 
plants, which would appear very unsightly in the front of the stage; 
observing, that the boards of such platform be laid one inch at least 
asunder, for the free admission of the circulating air. 
If two or three air-holes be made in the back wall, a little above 
this platform, or even below it, about six inches square in the out- 
side, and twelve inside, with close shutting doors towards the out- 
side and within, both opening inward; they will be found very use- 
ful in mild weather for ventilating the house, and driving off any 
foul air from the back part; in these holes, between both doors, 
you may stuff in any kind of wadding, to prevent air coming in that 
way, but when wanted. 
Never croud the plants, for when pent in too closely, a stag- 
nant rancid vapour is generated which often occasions a mouldi- 
ness upon the tender shoots and leaves, very destructive to the 
plants; neither should too great a proportion of succulent plants 
ever be placed in this department, 
TJie Conservatory. 
The Green-house and Conservatory have been generally con- 
sidered as synonimous; their essential difference is this: in the 
Green-house, the trees and plants are either in tubs or pots, and 
are placed on stands or stages during the winter, till they are 
removed into some suitable situation abroad in summer. In the 
Conservatory, the ground plan is laid out in beds and borders, 
made up of the best compositions of soils that can be procured, 
three or four feet deep. In these the trees or plants, taken out of 
their tubs or pots, are regularly planted, in the same manner as 
hardy plants are in open air. This house is roofed, as well as front- 
ed with glass-work, and instead of taking out the plants in 
summer, as in the Green-house, the whole of the glass-roof is taken 
off, and the plants are thus exposed to the open air; and at the ap- 
proach of autumn frosts, the lights are again put on, and remain so 
till the May following. 
This building being furnished with flues, &c. may be used as a 
Green-house at discretion, by introducing stages instead of beds, 
and in that case the glass-roof may be permanently fixed. 
Work to be done in the Green-house. 
In mild days, when the weather, externally, is moderate and calm, 
let the windows be opened a little for the admission of fresh air 
about ten or eleven o'clock; and about two or three in the afternoon 
let them be shut close again. But the time of opening, and the 
time they should be kept so, must always be determined by the 
weather; for there are many changes, sometimes in a few hours, at 
this season. The upper lights may be let clown a few inches for 
