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Deci Log Log Slide Rule

L.E. Jones

A 10″ metal slide rule with a magnesium body and aluminum posts. The frameless cursor is made of plastic and aluminum. Grooves are present on the stock. The slide rule comes with a felt slip grey cover (to avoid corrosion problems encountered with magnesium slide rules.). Scales: Front: Cube Roots 1, 2, and 3, DF, CF, T, ST, S, C, D, DI, Roots 1 and 2. Back: 1/N1,1/N2, 1/N3, 1/N4, DF/M, CF/M, Th, Sh, Sh, CI, C, CoD, N1, N2, N3, N4D.

Accession Number: 2010.lej.3

Alternative Name:

Primary Materials: Metal, Plastic, magnesium, aluminum


Old inventory number = 3. Patent and model number and company information are engraved at ends of slide rule.

Dimensions (cm):

Length = 30.7 cm, Width = 6 cm, Height = 0.6 cm

Function: Facilitating calculations.


Item is in very good condition. The cardboard container is slightly damaged.

Associated Instruments:


Pickett and Eckel Inc., Alhambra, California, USA

Date of Manufacture: c. 1950-1958


Part of L. E. Jones’ slide rule collection.

Additional Information and References:

Historical Notes:

Includes: Pickett instruction manual for Deci Log Log Slide Rule, Model 3 (1947); Pickett instruction manual for Deci Log Log Slide Rule Model 4 (1948); 1-page booklet.


  • Donated to UTSIC