The engine was of typical Cornish construction with a cylinder of 40 inches. It was the workhorse of the mine, being used to pump water from the mine, raise the copper ore up the shafts and to power the ore-dressing machinery. A Cornish boiler produced steam to drive the engine. These boilers were the first to use high-pressure steam and were invented in 1815 by the Cornish engineer Richard Trevithick (who also invented the first steamroad locomotive).
