88 THE GREEN-HOUSE. [Jan. 
shrinking bj drought; that all parts be well jointed and fitted 
together, so as to be as nearly air tight as possible. 
A house constructed on this plan will verj seldom require the 
assistance of fire-heat, which ought always to be used with great 
caution in a green-house; it will admit light, collect heat, and give 
health, beauty, and vigour to all the plants. 
Some green-houses, for large collections of plants, have two 
wings of smaller dimensions added to the main building, one at 
each end, in a right line, separated sometimes from it by glass 
partitions and sliding sashes for communication, the front almost 
wholly of glass, and part glass roofs, as above observed; thus, by 
these additional wings, the green-house will consist of three divi- 
sions, whereby the difterent qualities and temperatures of the 
various plants can be more eligibly suited. The middle or main 
division may be for all the principal and more hardy, woody or 
shrubby kinds, which require protection from frost only; one of the 
wings may be appropriated for the succulent tribe, and the other 
for the more tender kinds that require occasional heat in winter, 
yet can live without the constant heat of a stove or hot-house. 
Many green-houses, as they are commonly built, serve more for 
ornament than use; their situation to receive the south sun being 
the only essential that seems to be regarded towards preserving 
the health of the plants which they are intended to protect. It is 
rare to find one that will keep plants in good health during the 
winter, either by reason of their situation in moist places, their 
want of a sufliciency of glasses to attract heat and admit a due 
quantity of light, or of the glasses not being constructed so as to 
slide up and down occasionally, as they ought — as well to suffer 
the foul air to be discharged as to admit fresh. Sometimes where 
a green-house has been well considered in these points, all is con- 
founded by the introduction of a mettle stove and pipes, which 
never can be managed so as to give, when necessary, that gradual 
and well regulated heat, which will protect the plants without 
injuring them; and, besides, both the stove and pipes unavoidably 
emit in the house a quantity of smoke, which seldom fails to annoy 
the plants. It does not unfrequently happen when such a house is 
entrusted to the care of an ignorant or negligent person, that the 
whole collection is destroyed in one night by excessive heat, or at 
least rendered of very little value; this is'an evil which ought to 
be carefully guarded against. 
For the particular method of erecting the furnace and flues, see 
the article Hot-House, for this month, with which it agrees in 
every respect, only that one range round the house and two along 
the back wall will be sufficient; and that the flues may or may not 
be erected close to the walls, at pleasure. 
On whatever plan the green-house is constructed, let the whole 
inside, both ceiling, walls and flues be neatly finished oft" with good 
plaster and white-wash, and all the wood work made with the most 
critical exactness of good seasoned timber, particularly the doors, 
sashes and sash frames — the whole to be painted white — and let 
