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Slide Rule - linear 16" auto frettage

Major collection: Science & Technology
Object type: slide rule
Maker: Measurements: 1/2 in x 15 1/2 in x 5 in
Nomenclature: data processing tools and equipment - slide rules
Classification: tools and equipment

Plaque on reverse: "Master Chart and Slide Rule for Auto Frettage Calculations, Watertown Arsenal Lab, March 18, 1925. J.C. S." Includes leather case, six pages of calculations, directions and plotting chart. Table of ratios. Calculates the strain on cylinders undergoing flows or stresses.


Gift of Willard Marquis