Rough sketch of James Nasmyths' apparatus by which most perfect sound speculae may be cast with absolute certainty.

'Long Boiler' locomotive, c 1845. Model (sc

'Long Boiler' locomotive, c 1845. Model (sc

Vaginal speculum, late 19th century.

Monotype composition caster used for hot-metal typesetting.

Construction of Dove Holes Tunnel, Derbyshire, 1860-1865.

Navvies at Pit Bank Shaft No 4, Belsize Tunnel, London, c 1865.

Fashions at the Royal Ascot Races, 15 June 1938.

Construction of the Rotherhithe Tunnel, London, 1907.

Whittle W1 Jet Propulsion Engine, 1941. 3/4

Flying Scotsman Empire Exhibition Wembley 1924, Figs 3 & 4

'Pisa, The Leaning Tower, eastern extremity of Cathedral', 25 June 1841.