Thatcher's Rule

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  • Details
  • Description
Date Introduced
1920 ca.
Photographer
Richards, Mark
Dimensions
in box: 6.5 x 24 x 6 1/2 in.
Manufacturer
Keuffel & Esser Company
Credit Line
Loan of Gwen and Gordon Bell
Copyright Owner
© Mark Richards
Location
United States
Keywords
Oughtred, William; Analog; Slide rule; Hand calculation
Object ID
B29.77

A rule specially designed with very long scales for greater accuracy.