Circular slide rule by Troughton and Simms
Circular slide rule by Troughton and Simms, designed by William Froude c.1877, with inscription plate and three logarithmic scales, used at the Admiralty Experimental Establishment, by Troughton and Simms, London, 1887
- Measurements:
-
Overall: 400 mm x 280 mm x 315 mm, 18 kg
- Materials:
- glass , ivory , wood (unidentified) , brass (copper, zinc alloy) and silver plated
- Object Number:
- 1941-8/1
- type:
- slide rule