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LicenseParallel rule in bakelite signed `Lund's Rule, Pat. Nov. 2
Science Museum Group
© The Board of Trustees of the Science Museum
Parallel rule in bakelite signed `Lund's Rule, Pat. Nov. 2.20' and `Bliss'. Sold by Bliss & Co. of New York, c. 1925
Details
- Category:
- Mathematics
- Object Number:
- 1991-316
- type:
- rules (drawing) and parallel rules
- credit:
- Coffeen, D.
