Log-Log Duplex Slide Rule
Accession Number: 2010.lej.7
A 10″ slide rule made of PVC with grooved rule and ridges on the slide. There are stainless steel stops on both sides. The cursor is of glass with a stainless steel frame and a single cursor line. Scale: Front: L (Mantissa), LL1, DF and CF (folded at pi), CIF, CI, C, D, LL3, LL2. Back: LL0 and LL00 (Reciprocal log-log scales), A, B, T, ST, S, D, DI, K. Includes two small documents. One provides information about the slide rule. The other is an advertisement for Regulux slide rule cleaning paste.
Primary Materials: Plastic, Metal, Glass, steel
Old inventory number = 7. At one end, the slide rule is engraved “B. R. L. T.50 Janus Series, Made in England.”
Length = 32.7 cm, Width = 5.6 cm, Height = 1.8 cm
Function: Facilitating calculations.
Condition: Item is in very good condition.
Manufacturer: Blundell Rules, Ltd., England
Date of Manufacture: c. 1948-1964
Part of the L. E. Jones slide rule collection.
Donated to UTSIC: Yes