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The Ever There Slide Rule- Casing and Manual Only

L.E. Jones

Ironically, the Ever There slide rule was not there. A green cardboard case contains only the instruction manual. It once contained a 5″ Mannheim slide rule. The slide rule would have weighed no more than a fountain pen and had very little bulk. Instruction manual: K & E The Ever-There Slide Rule no. 4097D Simple Directions for Use. (copyright 1937, 1947)

Accession Number: 2010.lej.18

Alternative Name:

Primary Materials:

Markings: Old Inventory Number = 18.

Dimensions (cm): N/A

Function: Facilitating calculations.


Associated Instruments:

Manufacturer: Keuffel and Esser Co., New York

Date of Manufacture: c. 1936-1954


Additional Information and References:

Historical Notes: