Circular slide rule

Made:: Illinois

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Circular slide rule, cardboard with plastic cursor arm
Science Museum Group
© The Board of Trustees of the Science Museum

Circular slide rule, cardboard with plastic cursor arm, made 1957 by Perrygraf, Illinois for General Industrial Company, Illinois

Details

Category:: Mathematics

Object Number:: 1985-273

type:: circular slide rule

credit:: Crosby, R.C.

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Circular slide rule

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