Sample of Besemer steel, 1860.

'Clacton Disturbances', 30 March 1964.

Clacton 'Scooter' riots, 1964.

Two scientists at work in a laboratory, c 1930s.

Haematology laboratory, 1981.

Haematology laboratory, 1981.

Haematology laboratory, 1981.

Mounted policeman and CND marchers, April 1963 or 1965.

Radio-controlled desk clock, American, 2000.

First London-Aldermaston march, London, April 1958.

Insulator from the Philips Million-Volt Accelerator, 1937.

Radio-controlled desk clock, American, 2000.