The hearth or forge was the heart of the smithy. Usually square and brick built the hearth contained the fire and raised it to a height where work could be switched from it to the anvil and back with the minimum of lifting.
Above the forge a tapering cowl
built of brick or sheet iron collected the smoke or fumes and led them up to the
chimney. In front of the forge often built into it was a cast iron
water trough or "bosh" used for cooling the work or quenching tools that got too
hot. A rail on which the smith kept his array of tongs was fixed to the forge at
a handy height.