Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Long and Long Scale Slide Rules
Engineers Slide Rule Co. / Scofield-Thacher
The Engineers Slide Rule Co.
60 cm
General Calculations

Notes: Although a Duplex long-scale model a better description is two back-to-back Simplex slide rules designed by E.M. Scofield. It intentionally does not have or need a cursor.

Image 1

Image 2

Image 3

Image 4

Image 5

Image 6

Image 7

Image 8