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Pickett Deci Log Log Slide Rule. Model Number 2.

L.E. Jones

A 10″ slide rule with magnesium body (stock and slide) and steel stops. The slide has ridges and the stock is grooved. The glass cursor is frameless with the glass screwed to two pieces of metal. The slide rule comes in a grey felt case and a grey cardboard box. An instruction booklet is included. Scales: Front: 1/N1(0.00D), 1/N2 (0.0D), 1/N3 (0.D) 1/N4 (D.0), CF, CI, C, Co, D, N1 (0.00D), N2 ().0D), N3 (0.D) and N4 (D.0). Back: 3√, 3 √, 3, I, T, T, ST, S, CI, C, D, √, √,. In addition to the scales, this ruler also has instruction tables about the use of the S and T scales and the functions for finding powers and indices. Markings: International Copyright 1947, U. S. A Coyright 1947, R. C. Pickett, A. F. Eckel, Chicago, U. S. A.; patents Pending, Made in the U. S. A., Pickett & Eckel, Inc. Chicago 3, U. S. A. Model 2.

From Additional Info old field – Includes: Pickett instruction manual for Deci Log Log Slide Rule. Copyright 1947. Also includes a small sheet on adjustment, protection and lubrication, a felt case, and the original cardboard box.

Accession Number: 2010.lej.27

Alternative Name:

Primary Materials: Magnesium, Steel, Glass

Markings: Old Inventory Number = 27.

Dimensions (cm):

Length = 31 cm, Width = 6.2 cm, Height = .8cm

Function: Facilitating calculations.


Item is in good condition. Due to magnesium expansion and corrosion, the slider does not move.

Associated Instruments:

Manufacturer: Pickett and Eckel, Inc. Chicago 3.

Date of Manufacture: c. 1947-1950


Additional Information and References:

Historical Notes: