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Date

Model of Chadwick's apparatus used to discover the neutron

1960-1970

Model of splitting of uranium-235 atom

1960-1970

Wharfedale 'Coronet' extension loudspeaker

1937

Distorting viewer: two prisms in cardboard case

1850-1924

Rogers LS 5/9 Loudspeaker

1983-1998
Coloured chart entitled The Equation of Time, Science Museum, London, England, 1964-1965. It shows the difference beween mean and solar time for the separate influences of the earth orbit and its axis.

Chart entitled The Equation of Time, Science Museum, 1964-1965

1964-1965
Model illustrating William Henry Bragg's Law of Relection of X-rays from crystal planes, with detachable rotating arm carrying a wire view-finder and interchangeable wooden board painted white lines, unsigned, by Science Museum, Workshops, South Kensington, London, 1947

Model illustrating Bragg's Law of Relection of X-rays from crystal planes

1947
Model, scale 1:48, of a water powered Astronomical Clock-Tower, Science Museum, South Kensington, London, England, 1965. The original was built on the initiative of Su Song in 1088 and described in print in 1172.

Model of a Chinese Astronomical Clock-Tower, 1965

1965
Box for mouse used with Ferranti Freescan digitiser, by Ferranti Ltd., British, 1969. Used to computerise OS maps.

Box for mouse used with Ferranti Freescan digitiser

1969