The oven is heated by a circulation of hot air. This is accomplished by closing the oven-damper, which is situated near the oven. When this damper is left open, the hot air rushes up the chimney. The damper near the chimney is known as the chimney-damper. When open it gives a free outlet for the escape of smoke and gas. When partially closed, as is usually the case in most ranges, except when the fire is started, it serves as a saver of heat. There is also a Chapter II - COOKERY 16
check, which, when open, cools the fire and saves heat, but should always be closed except when used for this purpose.
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