THE MANUAL OF GARDENING. 
21 
may be brought to flower in pots in a hot-house, yet numbers, of 
the larger sorts particularly, never can thus arrive at any thing 
like perfection of size. Due attention must be paid at all times 
to regulate the temperature, and in the winter months to keep 
off frosts : ventilation must also be attended to, so as to exclude 
damp ; the plants must be duly watered with milk-warm water, 
keeping them free from decayed leaves or flowers. A supply of 
flowering bulbs and other plants must be kept up so as to secure 
a succession. Climbing plants trained in festoons add greatly to 
the beauty of the place during the summer months. 
The Green-House is similar in its use to the conservatory, but 
it is on a smaller scale, the plants being kept in boxes, or pots of 
various sizes. The old method was to construct a shed-like 
building with a roof sloping towards the south, or south-east, but 
span roofs ranging north and south, are now considered more suit- 
able for the purpose of growing handsome plants, than the old 
form. 
Thus far we have reprinted from the London edition, the re- 
marks on houses, and management of plants; but the difference 
in our climate, and other considerations, have induced the rejec- 
tion of the remainder of that article, and the substitution of ori- 
ginal observations. 
Many other plans have been suggested for constructing this 
delightful appendage to both country and city residences. Expe- 
rience has shown that a portion, at least, of the expense hitherto 
incurred in their erection is not actually necessary, and that a 
simple building, properly constructed, and sufficiently extensive 
for private gratification, may now be erected at a very moderate 
cost; and so simplified has the form become by successive modi- 
fications, that no difficulty exists in finding builders competent to 
execute the work. We could readily append plans, and lay down 
directions for the instruction of the builder; but it must be evi- 
dent, that however elaborate they might be, they would be of 
little value compared with the inspection of such structures, in 
company with an intelligent carpenter. The better plan, there- 
fore, for those who may design putting up a green-house, is to 
examine such as may be within their reach, and select as a model, 
some one which has proved well adapted to the purpose. It will 
be very easy to vary the size to suit the position in which it is in- 
tended to build, or the amount of expenditure contemplated. 
In cases where it is not the wish of cultivators to incur the 
expense of an elevated structure, one of more humble pretension, 
but of successful application may be adopted ; we allude to the 
Cold-pit, a sort of subterranean green-house, or frame, partially 
under ground, to screen it from the cold, and covered by glass, 
and provided with moveable outside shutters. The pit should be 
placed where it would be protected from northerly winds, and if 
