Hatchet planimeter, by Knudsen, in case

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Hatchet planimeter, by Knudsen, in case
Science Museum Group
© The Board of Trustees of the Science Museum

Hatchet planimeter, by Knudsen, in case

Details

Category:: Mathematics

Object Number:: 1933-362

type:: planimeter

credit:: Professor W.C. Unwin

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Hatchet planimeter, by Knudsen, in case

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