Boucher's Calculator

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  • Details
  • Description
Date Introduced
Patented 1876
Photographer
Richards, Mark
Dimensions
1/2 x 2 x 3 in.
Manufacturer
Manloves, London
Credit Line
Loan of Gwen and Gordon Bell
Copyright Owner
© Mark Richards
Location
United Kingdom
Keywords
Oughtred, William; Analog; Slide rule; Hand calculation
Object ID
B218.82

This is an early version of a watch-size rule. In a 1911 catalog of “Drawing Materials and Surveying Instruments” it was listed for $8 with cardboard dials, and for $14 with metal dials.