requires a different type of burner and stove. As a usual thing gasoline
cannot be burned in kerosene stoves nor kerosene in gasoline stoves. (In
the stove shown in Figure 15, however, either fuel may be burned.)

When gasoline is used in a stove, it is necessary to vaporize the gasoline
before lighting the burner. This is accomplished in most stoves by letting
the gasoline flow into a cup situated underneath the burner, turning off
the supply of gasoline, and then applying a match to the cup. By the time
the gasoline is burned the burner is heated. Then the stopcock is turned
on, a match applied to the burner, and the gasoline vaporizes and burns.

Gasoline burners, like those in which kerosene is burned, should be kept
clean. When a mixture of gasoline vapor and air is heated, an explosion
may result. It is for this reason that _the tank or gasoline container
of a stove should never be filled while the burners of the stove are
lighted or even hot._

[Illustration: Courtesy of _Westinghouse Electric and Manufacturing
Co_ FIGURE 16.--ELECTRIC RANGE.]

ELECTRIC STOVES. [Footnote 11: See note to the teacher, Footnote 9.]--It
was mentioned previously that electricity is not a fuel. Hence electric
stoves are not provided with burners. They have heaters which contain
coils of wires through which an electric current passes. Electricity is
the cleanest source of heat for cooking. But in order to operate an
electric stove economically, it is necessary to utilize the current
required for a heating element to its greatest extent. For example, if the
current is turned on to heat the oven as many foods as possible should be
cooked in the oven (see Figure 16).