Early Geiger counter, made by Hans Geiger, 1932.

Mechanical counter, mid 19th century.

Dr T E Allibone demonstrating a Geiger counter, 1959.

Pasengers seated at counter in British Railways Buffet Carriage, 1951.

Mechanical counter, 2001.

Mechanical counter, 2001.

'Electric Build-it Set', c 1956-1960.

The Lebaudy Airship, 1904.

Model of tilt and lift hammers, 1804.

Model yacht, 1998.

Model E-1 'Electric Build-it Set', USA, 1956-1960.

Pasengers seated at counter in British Railways Buffet Carriage, 1951.