These copulas made the iron for casting.
history under ground
cupolas
Copper poured from this furnace and was cast by the autocaster on the right into billets.
The last batch of molded metal stuck in the chute, this metallurgical furnace was falling apart brick by disintegrating brick b the time I got to it. On the upper floors there is a sophisticated network of vents and chimneys to make these little furnaces as hot as possible.