Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
"Spectro-Rule, catalog #440 (v2)"
"Somar Laboratories, Inc""New York, U.S.A."
c. 19688.9 cm x 45.6 cmChemistry / Physics

Notes: "1) Calculations for X-Ray Spectroscopy with a table of to elements up to number 100 2) All aluminum slide rule with unusual construction, front and back sandwitch with a slot for the slide and window cutouts to see the slide. 3) The scales for the aluminum version appear to be photocopies of the plastic version."

Image 1

Image 2