Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Ross Rapid Computer
Louis Ross"San Francisco, U.S.A."
1918Dia. = 12.5 cmGeneral Calculations

Notes: "1) Fourteen scales are provided for general engineering calculations. 2) See Vol 25, No 1 pg23-27 Journal of the Oughtred Society for a details about this slide rule."

Image 1

Image 2

Image 3

Image 4