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From: Webster's Revised Unabridged Dictionary (1913)

 Pud·dling n.
 1. Hydraul. Engin. (a) The process of working clay, loam, pulverized ore, etc., with water, to render it compact, or impervious to liquids; also, the process of rendering anything impervious to liquids by means of puddled material. (b) Puddle. See Puddle, n., 2.
 2. Metal. The art or process of converting cast iron into wrought iron or steel by subjecting it to intense heat and frequent stirring in a reverberatory furnace in the presence of oxidizing substances, by which it is freed from a portion of its carbon and other impurities.
 Puddling furnace, a reverberatory furnace in which cast iron is converted into wrought iron or into steel by puddling.
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