Oil painting by C von Breda. Works owner Matthew Boulton (1728-1809) and Scottish engineeer and inventor, James Watt (1736-1819) formed a partnership in 1773 to produce steam engines. Boulton's factory at Soho, near Birmingham, produced the first of the revolutionary steam engines designed by Watt. By the early 19th century over 500 Boulton and Watt engines were being used in Britain's mines and factories.
© Science Museum / Science & Society Picture Library