Two castration devices, late 19th to early 20th century.

Laryngeal ecraseur, late 19th century.

Laryngeal instruments, late 19th century.

Screw-thread correcting lathe, c 1910.

Circus tightrope walkers in action, c 1930s

Single action pumping engine, Watt model.

High jumper in action, c 1920s.

Maudslay screw thread cutter, c1800-1805.

Paddle-wheel steamer 'Basilisk' and screw steamer 'Niger', 1849.

The screw yacht 'Sunbeam', 1874.

Tennis player Mrs Sperling in action at Wimbledon, 1935.

Mis J Hartigan in action at Wimbledon, 1935.