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Wharfedale 'Coronet' extension loudspeaker

Wharfedale 'Coronet' extension loudspeaker

1937
Model of Chadwick's apparatus used to discover the neutron

Model of Chadwick's apparatus used to discover the neutron

1960-1970
Model of splitting of uranium-235 atom

Model of splitting of uranium-235 atom

1960-1970
Vitamin B12 wet crystal structure model

Vitamin B12 wet crystal structure model

1957-1959
First model of the impossible staircase

First model of the impossible staircase

1955-1959
Fitted wooden box

Fitted wooden box

1957
Sliding block puzzle

Sliding block puzzle

1945-1955
Distorting viewer: two prisms in cardboard case

Distorting viewer: two prisms in cardboard case

1850-1924
Components from model (scale 1: 6) of combined chaff cutter and sifting machine

Components from model (scale 1: 6) of combined chaff cutter and sifting machine

1904-1905
Rogers LS 5/9 Loudspeaker

Rogers LS 5/9 Loudspeaker

1983-1998
First model of the 'Impossible triangle'

First model of the 'Impossible triangle'

1955-1959
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
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
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
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
Coloured counting bars, a mathematical teaching aid designed and made by the Montessori Centre, London, England, 2000.

Mathematical teaching aid for counting

2000
Slatted base for glass sculpture '2020: the Sphere that Changed the World' by Angela Palmer, 2020. Edition 1 of 3. Each slat is built to house one of the 28 glass sheets which together depict the depict the SARS-CoV-2 virus.

Base for '2020: the Sphere that Changed the World' sculpture of Coronavirus by Angela Palmer

2020