arranged accomplish this equally well.

After extensive inquiry and many personal experiments, the author has
found a cooking-stove constructed on true scientific principles, which
unites convenience, comfort, and economy in a remarkable manner. Of
this stove, drawings and descriptions will now be given, as the best
mode of illustrating the practical applications of these principles
to the art of cooking, and to show how much American women have suffered
and how much they have been imposed upon for want of proper knowledge
in this branch of their profession. And every woman can understand
what follows with much less effort than young girls at high-schools
give to the first problems of Geometry--for which they will never have
any practical use, while attention to this problem of home affairs
will cultivate the intellect quite as much as the abstract reasonings
of Algebra and Geometry.,

[Illustration: Fig. 34.]

Fig. 34 represents a portion of the interior of this cooking-stove.
First, notice the fire-box, which has corrugated (literally, wrinkled)
sides, by which space is economized, so that as much heating surface
is secured as if they were one third larger; as the heat radiates from
every part of the undulating surface, which is one third greater in
superficial extent than if it were plane. The shape of the fire-box
also secures more heat by having oblique sides--which radiate more
effectively into the oven beneath than if they were perpendicular, as
illustrated below--while also it is sunk into the oven, so as to radiate
from three instead of from two sides, as in most other stoves, the
front of whose fire-boxes with their grates are built so as to be the
front of the stove itself.