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 the amateur must proceed with great caution in
undertaking intensive cultivation under glass. Build at first the
simplest and least expensive kind of hotbeds or greenhouses. It
takes three to five seasons to train even an experienced farmer
along these special lines. Separate crops require special treatment.
Do not experiment, but follow well-tried procedure. It is
comparatively easy to farm an acre under glass, but it should be
worked up to, each step being taken only after a solid foundation is
ready to build on.
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