Catalan furnace

from 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]