Puddling Furnace

“The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with an air course to cool it, c the bed supported on iron plates with air courses under them, f the exit flue leading to the chimney stack, which is surmounted with a damper k worked by a chain i from within the shen in which the forge is placed; b is the ashpit, g the slag-hole, and e the working door suspended by a chain from a lever with the counterpoise attached h, resting on the front side of the furnace roof.” — The Encyclopedia Britannica, 1893

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