If
electricity costs 3 cents a kilowatt-hour, which is the price charged in
some localities, the bill should come to 45 X .03 or $1.35.
PRINCIPLE OF STOVES
62. Before stoves for cooking came into use in the home, food was cooked
in open fireplaces. Even when wood was the only fuel known, a stove for
burning it, called the Franklin stove, was invented by Benjamin
Franklin, but not until coal came into use as fuel were iron stoves
made. For a long time stoves were used mainly for heating purposes, as
many housewives preferred to cook at the open fireplace. However, this
method of cooking has practically disappeared and a stove of some kind
is in use for cooking in every home.
63. For each fuel in common use there are many specially constructed
stoves, each having some advantageous feature; yet all stoves
constructed for the same fuel are practically the same in principle. In
order that fuel will burn and produce heat, it must have air, because
fuel, whether it is wood, coal, or gas, is composed largely of _carbon_
and air largely of _oxygen_, and it is the rapid union of these two
chemical elements that produces heat. Therefore, in order that each
stove may work properly, some way in which to furnish air for the fire
in the firebox must be provided. For this reason, every stove for
cooking contains passageways for air and is connected with a chimney,
which contains a flue, or passage, that leads to the outer air.
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