atness, the preservation of the tubs, and
to prevent the roots from running through; but an inch of nice gravel
would have secured the first without the objections that lie against the
thick coat of pebbles, while the other objects will not be secured; for
the tubs will rot, and the roots will not thus be prevented from running
through the pots. This object must be secured by other means than
pebbles. The pebbles are unpleasant to walk on, become heated, and dry
off the house too rapidly, to the manifest injury of the plants. We
merely mention the subject, that our readers may avoid a similar error,
and save themselves the money thus needlessly spent.

_Fig._ 72 is a perspective view of the house. The west end is boarded
and battened. This corresponds with the general design of the house, and
presents a neat finish. The sides, except the potting room, are of
glass, the sashes being about three feet high. Every other sash is hung
at the bottom, for the purpose of ventilation. The roof is a continuous
glazed roof, and is quite flat, which is a decided advantage to the
plants within. There are no ventilators in the roof, the top ventilation
being effected by means of the sashes over the doors at each end, which
are hung at the bottom for this purpose, and afford abundant ventilation
for a house the length of this one. There is an ornamental crest along
the ridge, and at each end a neat finial.

DESIGN No. 10.

[Illustration: FIG. 29.--_Perspective View._]

[Illustration: FIG. 30.--_Section._]

Our next example is a Cold Grapery, erected at South Manchester,
Connecticut.

_Fig._ 29 is the perspective view of the house, and _Fig._ 30 is a
section. The house is twenty feet wide and sixty feet long. In _Fig._
30, _a_ is a stone wall, with a drain under it. _b_ is a hollow brick
wall. _d_, _d_, is the ground level of the house on the inside; the line
below _b_ is the level on the outside, but the earth is embanked
against the brick wall to within an inch of the sill. A small house is
shown at the north end which is used for tools, potting, &c. The border
is about three feet deep, and occupies the whole interior of the house.
There is no outside border. On the bottom is placed about one foot of
"tussocks" from a neighboring bog, which may in time decay. The border
is made up pretty freely of muck, with the addition of sand, loam,
charcoal dust, bone dust, etc. There is a row of vines, two feet and a
half apart, at each