Image dissector tube.

Emitron television camera tube, 1932.

The 'Penetrator' X-ray tube, 1896-1900.

Walthamstow tube station platform, 2005.

Finchley Road tube station at night, London, 2005.

Torpedo tubes in the interior of a British submarine, 1914-1918.

Extrusion die for elastic band tubing, 1965-1975.

Elastic band tubing and elastic bands, 1996.

Crookes tube, c 1888.

Electric egg between two discharge tubes.

Priestly-Smith fusion tubes and leather case, 1895-1898.

City & South London electric tube trains at Euston underground station, c 1908.