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.
[Illustration: Fig 35. Model Stove]
[Illustration: Fig 36. Ordinary Stove]
The oven is the space under and around the back and front sides of the
fire-box. The oven-bottom is not introduced in the diagram, but it is
a horizontal plate between the fire-box and what is represented as the
"flue-plate," which separates the oven from the bottom of the stove.
The top of the oven is the horizontal corrugated plate passing from
the rear edge of the fire-box to the back flues. These are three in
number--the back centre-flue, which is closed to the heat and smoke
coming over the oven from the fire-box by a damper--and the two back
corner-flues. Down these two corner-flues passes the current of hot
air and smoke, having first drawn across the corrugated oven-top.
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