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
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