92 THE HOT-HOUSE. [Jan. 
heat all the year round, and the flues used occasionally for fire-heat 
in winter or during cold weather, to produce such an additional 
warmth in the internal air as may be requisite at that season; the 
bark, bed being formed as hereafter directed, is productive of a 
uniform moderate growing heat of long duration, peculiarly adapted 
for the reception and growth of the most tender exotics, which 
require to be kept constantly plunged in their pots in it, such as 
pine apple, &c., in order to enjoy the benefit of that durable, moist 
bottom heat about their roots, peculiar to bark beds only, whose 
heat also evaporates and warms the air of the stove at all times, 
that even the plants on the surrounding shelves are comforted by 
its influence; so that with the aid of fire-heat in winter, regulated 
by a well graduated botanical thermometer placed constantly in 
the stove distant from the fire place, and as much in the shade as 
possible, there are hardly any exotics from the hottest regions of 
the world, either woody, herbaceous, or succulent, but may be 
cultivated in it, by placing them in such difierent situations as 
their nature may require. 
In the arrangement of the plants in this stove, some require the 
bark-bed, others succeed in any part of the house, and others, such 
as the succulents, require the dryest situation near the flues: many 
of the more tender, herbaceous, and shrubby plants, natives of the 
hottest countries, generally succeed best when plunged in the 
bark bed, though many sorts, both herbaceous and woody, thrive 
tolerably well in any part of the bark stove. 
I shall now proceed to give a minutiae of its general structure, 
upon the most improved plan, the more especially as many persons 
who may be desirous of erecting such may probably not be able to 
procure workmen capable of constructing it, without minute and 
particular directions. 
Having determined on the size, as to length, width, &c., proceed 
to lay the foundation of the walls, allowing due thickness for the 
erection of the surrounding inside flues on the foundation wall, with 
an allowance for their being detached therefrom about two or three 
inches. 
Then set off the back or north wall at least two bricks or 
eighteen inches thick, and the front and end walls about thirteen, 
carrying up the back wall from ten to fourteen feet high, in propor- 
tion to the width of the house: but those of the front and ends, from 
two to three feet, as the circumstances hereafter noticed may re- 
quire, upon which to erect the upright timber framing for the per- 
pendicular lights; previously observing, in carrying up the walls, 
to allot a proper space for a door-way, at one or both ends towards 
the back part; setting out also the furnace or fire-place in the bot- 
tom foundation, towards one end of the back wall behind, formed 
also of brick work, and made so as to communicate with the lowest 
flue within, the inside top of the furnace being about a foot lower 
than said flue, the better to promote the draught of heat and smoke; 
though, if the stove be more than about thirty-five feet long, a fire- 
place near each end will be necessary; or, if more convenient, they 
may both be in the middle of the back wall^ each communicating 
