"Calculex" Circular Slide Rule

\"Calculex\" Circular Slide Rule \"Calculex\" Circular Slide Rule

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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\"Calculex\" Circular Slide Rule
Science Museum Group
© The Board of Trustees of the Science Museum

\"Calculex\" Circular Slide Rule
Science Museum Group
© The Board of Trustees of the Science Museum

Halden's 'Calculex' patent circular slide rule in silver case.

Details

Category:
Mathematics
Object Number:
Y1981.20.1
Materials:
silver (metal) and glass
Measurements:
overall: 15 mm x 63 mm x 84 mm,
type:
slide rule
credit:
Gift of Mr. P.F. Lee