The Collaborative International Dictionary of English v.0.48:

Forge \Forge\ (f[=o]rj), n. [F. forge, fr. L. fabrica the
   workshop of an artisan who works in hard materials, fr. faber
   artisan, smith, as adj., skillful, ingenious; cf. Gr. ? soft,
   tender. Cf. Fabric.]
   1. A place or establishment where iron or other metals are
      wrought by heating and hammering; especially, a furnace,
      or a shop with its furnace, etc., where iron is heated and
      wrought; a smithy.
      [1913 Webster]

            In the quick forge and working house of thought.
                                                  --Shak.
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   2. The works where wrought iron is produced directly from the
      ore, or where iron is rendered malleable by puddling and
      shingling; a shingling mill.
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   3. The act of beating or working iron or steel; the
      manufacture of metallic bodies. [Obs.]
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            In the greater bodies the forge was easy. --Bacon.
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   American forge, a forge for the direct production of
      wrought iron, differing from the old Catalan forge mainly
      in using finely crushed ore and working continuously.
      --Raymond.

   Catalan forge. (Metal.) See under Catalan.

   Forge cinder, the dross or slag form a forge or bloomary.


   Forge rolls, Forge train, the train of rolls by which a
      bloom is converted into puddle bars.

   Forge wagon (Mil.), a wagon fitted up for transporting a
      blackmith's forge and tools.

   Portable forge, a light and compact blacksmith's forge,
      with bellows, etc., that may be moved from place to place.
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The Collaborative International Dictionary of English v.0.48:

Catalan \Cat"a*lan\, a.
   Of or pertaining to Catalonia. -- n. A native or inhabitant
   of Catalonia; also, the language of Catalonia.
   [1913 Webster]

   Catalan furnace, Catalan forge (Metal.), a kind of
      furnace for producing wrought iron directly from the ore.
      It was formerly much used, esp. in Catalonia, and is still
      used in some parts of the United States and elsewhere.
      [1913 Webster]