ng possessed of one of these light
greenhouse structures, has indulged in a few costly, exotic plants.
They will be frozen, to a certainty! It is economy to pay a fair
price in the beginning to secure a properly built greenhouse that
will withstand the trials of winter."

"If iron frame is used instead of wood there is greater durability,
and the structure being more slender, will admit more light, but the
cost will be increased."

"It makes very little difference in cost what shape of house is to
be erected. The cost per lineal foot for an even span is practically
the same as for a lean-to of the same length and width. In the
lean-to, in order to get the sufficient bench and walk space inside,
it is necessary to carry the roof to a point much higher than in the
even span. The extra framework and material for the roof cost a good
deal, yet add practically nothing to the efficiency of the house."

"Heating of greenhouses is best done by hot water, and in a small
house the pipes may well be connected with the heating system used
for the dwelling, if the greenhouse and the home are within any sort
of reasonable distance from each other. For large houses, or ranges
of several houses together, the independent heating plant is
necessary. Steam is used for heating by commercial florists, but it
is economical only on a large scale."

"As a uniform temperature must be maintained in the house, the
fires, where steam is used, need watching continuously during cold
weather, for the moment the water ceases to boil, the pipes cool off
and a considerable time is consumed in starting the heat running
again. With hot water there is much more latitude in attention, for
though the fires dwindle' the water which fills the pipes will carry
heat for a long time, and it will circulate until the last degree is
radiated. But a hot-water system costs in the installation about one
fourth more than steam. Very small houses may be successfully heated
by kerosene stoves, which may be placed inside the house. A much
better way would be to use oil heaters for an inside water
circulation, carrying off all products of combustion by means of a
flue. Coal stoves should never be installed inside the house. It has
been done successfully by some amateurs, but the danger of coal gas
being driven back into the house by a down draft in the chimney is
too great a risk. Coal gas and illuminating gas are two virulent
poisons to plants."

It is obvious that