Circular slide rule

Made:
1877 in London
maker:
Troughton and Simms Limited

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

This circular slide rule was designed and used by the ship-design expert William Froude. It

was manufactured by the prominent mathematical-instrument makers, Troughton &

Simms, and speeded up calculations.

Froude spent the 1870s carrying out a series of experiments on ship design using the

world’s first ship test tank, built by the Admiralty near his house in Torquay. He used the

slide rule in his work relating experimental results to mathematical theory.

Details

Category:
Froude
Object Number:
1941-8/1
Materials:
brass (copper, zinc alloy), glass, ivory, silver plated and wood (unidentified)
type:
slide rule
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • calculator
  • furnishing and equipment
  • vehicle - transportation