An iron-founder's forge. Mezzotint by R. Earlom, 1773, after J. Wright, 1772.

Left, a heavy tilt-hammer is raised and dropped on to an iron ingot by the rotating cams protruding from a wheel powered by a stream or river outside the building. The iron-founder, benefitting from the labour-saving hammer, stands with his arms crossed, in the presence of his family. Another man uses tongs to hold the white hot iron on the anvil under the hammer