Hatchet planimeter, by Knudsen, in case

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