Archive of Collections



Details and Image



TypeModel No.MakerCountryConstruction
Material
DateScale LengthArea of Use
Linear
405
HemmiJapan
Celluloid on Bamboo
1950-195225 cmPortland Cement Composition

Notes: "Rule has no date code but cursor is labeled ""Made in Occupied Japan. CS2S(A Scale) has labeling error. See article J. Oughtred Soc. (in press): Frohlich, ""The Hemmi 405 cement composition slide rule""."


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Image 2