What is "forge train"

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.

   In the quick forge and working house of thought.
   --Shak.

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.

3. The act of beating or working iron or steel; the manufacture of metallic bodies. [Obs.]

   In the greater bodies the forge was easy.
   --Bacon.

   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.