Wheatstone bridge, c 1843.

Early electromagnetic engine, mid-19th century.

Heurtley magnifier, 1919.

Heurtley magnifier, 1919.

Wheatstone original printing telegraph, 184

Typewriter from the Wheatstone Collection.

'Prince Albert Inspecting the Galvanic Telegraph', London, 1843.

Cray 1A supercomputer, serial number 11, c 1979.

Wheatstone's automatic telegraph transmitter, 1858.

Early Wheatstone ABC telegraph receiver, c 1842.

Cray 1A supercomputer, serial number 11, c 1979.

Perforator and stand for Wheatstone automatic telegraph system, c 1900.