A smelting furnace turned iron ore from the near-by mountain into lumps of pure iron all ready for the farm's blacksmith to hammer and beat into horseshoes, pincers, tongs, crowbars, hammers, and other tools needed on the farm.
I can still hear the hiss of the white-hot horseshoes being plunged into a bucket of water, can still sniff the burny smell of the hoof to which a warm shoe was fixed.