Circular slide rule by Troughton and Simms
- Materials:
- glass , ivory , wood (unidentified) , brass (copper, zinc alloy) and silver plated
- Object Number:
- 1941-8/1
- type:
- slide rule
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 and presented by the Russian Minister of Maune to W. Froude.