Reverberatory furnace

A reverberatory furnace consists essentially of three parts--a fireplace at one end, a stack or chimney at the other, and a bed between both on which the matter is heated. The fireplace is separated from the bed by a low partition wall called the fire-bridge, and both are covered by an arched roof which rises from the end wall of the fireplace and gradually dips toward the furthest end of the bed connected with the stack.

The remains of a reverberatory furnace at Dyffryn adda.

On one or both sides of the bed, or at the end near the stack, may be openings through which the ore spread over the surface of the bed may be stirred about and exposed to the action of the air. The matter is heated in such a furnace by flame, and is kept from contact with the solid fuel. The flame in its course from the fireplace to the stack is reflected downwards or reverberated on the matter beneath, whence the name reverberatory furnace.