Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Circular and Spiral Slide Rules
Weems & Plath / Tyler Slide Rule
Weems & Plath Inc.
Ø ? 19 cm
General calculations

Notes: "The designer, John Tyler, was a professor of mathematics at the US Naval Academy. Unusually the scale layout is based on a log spiral curve. Although an innovative and novel, this design is harder to use, harder to read and tellingly offers less precision than comparably sized circular slide rules."

Image 1

Image 2