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"Danks rotary Puddling Furnace. The feel is burnt in an ordinary fireplace, a blast B being admitted under the bars and another over them A, level with the firing hole, so that by regulating the two streams of air the atmosphere can be kept reducing or oxidizing at will. A circular chamber or drum C is supported on massive friction rollers and arranged so that its axis is about level with the top of the bridge; at the other end is a movable terminal shaped like the frustum of a cone D, supported by chains or rods from a crane so that it can be swung on one side if required, thus serving as a door." — The Encyclopedia Britannica, 1893

Danks Furnace

"Danks rotary Puddling Furnace. The feel is burnt in an ordinary fireplace, a blast B being admitted…