The workshop of Scottish engineer James Watt , 1924.

The workshop of Scottish engineer James Watt in 1924.

Cover to 'Stationary engine driving', 1881.

Mrs James Watt, wife of James Watt, late 18th century.

Watt's Engine Counter, 18th century.

William Murdock, Scottish engineer and inventor of coal-gas lighting, c 1800.

James Watt Jr, son of James Watt, c 1800.

'Lesening the consumption of steam and fuel in fire engines', 1769.

Benjamin Cheverton, ceramics pioneer, c 1836-1860.

Boulton and Watt 6 hp rotative beam engine at Holyhead Docks, 1827.

Watt's tubular Surface Condenser, 1765.

John Rennie, Scottish civil engineer, c 1810s.