Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Long and Long Scale Slide Rules
Unknown / Cooper 100 inch
possibly UK
Wood/celluloid veneers
254 cm
Basic Calculations

Notes: A long-scale segmented grid-iron slide rule similar to a Thacher. This example dates from before Stanley starting making them in 1923. The 100 inch scale is divided into 20 5-inch long scales.

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