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LicenseHam's proof rule, 4ft x 3, with three slides, c. 1860'
Science Museum Group
© The Board of Trustees of the Science Museum
Ham's proof rule, 4ft x 3", with three slides, c. 1860
Details
- Category:
- Mathematics
- Object Number:
- 1954-322
- type:
- slide rule (excise) and slide rule (ham)
- credit:
- National Maritime Museum (Gabb Collection)
