emove my green-houses from their present site,
all shall be put up after this style."

Messrs. Parsons & Co., of Flushing have also built several houses
similar in design for the propagation of grape vines. These latter are
heated by brick flues and have proved very satisfactory. The vines are
grown in beds and not staked. Pot culture in the usual manner would
require greater height of roof. The only objection that we can see to
houses built in this manner is the accumulation of snow in the furrows.
Mr. Henderson assures us that this is not an objection of any moment in
this latitude, and that the expense attending the removal of snow is too
slight to be considered.

DESIGN No. 1.

Figures 5 and 6 are a section and ground plan of a propagating house for
growing grape vines, but it might serve as well for other plants. The
length of the house is on an east and west line, giving a northern
exposure to the roof on one side, the opposite facing the south. A board
partition runs through the centre dividing the house into two. This
partition might be made movable, so that at any time the house could all
be thrown into one. The foundations are of stone projecting 6 inches
above the ground. Two and a half feet of vertical boarding, above which
is two feet of sash, give a height of four and a half feet above the
foundation for the side of the house. The side sashes are hinged for
ventilation. Top ventilation is afforded at the ridge by ventilators
raised by rods from the inside. The roof is on the fixed principle that
is composed of sash bars extending from plate to ridge, in which the
glass is set. In the north division a combination of the tank and flue
systems of heating is adopted, by which economy of fuel to a
considerable extent is effected. The boiler is so set that the back of
it and all the connecting pipes are inside of the house, only the fire
and ash pit doors project through the brick partition into the boiler
pit. Much heat is generally wasted from hot water boilers by the direct
connection of the chimney with the outer air, that might be saved by
means of a well constructed flue. It will be seen that the smoke from
the boiler is carried under the tank, in this instance through 8 inch
vitrified drain pipe. To prevent the cracking of the pipe near the
boiler the first 6 or 8 feet is laid with cast iron pipe. Wooden tanks
built on posts and elevated two feet above the floor furnish bottom
heat. These tanks are t