Railway slide rule
1928
Selection of nine railway slide rules, English, three signed "P.H.J. 1928", eight paper on wood with brass fittings and one ivorine on wood
Details
- Category:
- Mathematics
- Object Number:
- 1986-379
- Materials:
- complete, wood (unidentified), brass (copper, zinc alloy) and paper (fibre product)
- type:
- slide rule (railway)
- credit:
- Delehar, P.
