Circular slide rule

Made:: 1949 in Illinois

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Circular slide rule, cardboard
Science Museum Group
© The Board of Trustees of the Science Museum

Circular slide rule, cardboard, for acoustical calculations: Masco "Sound Surveyor" made 1949 by Perrygraf, Illinois for Mark Simpson Manufacturing Company, New York

Details

Category:: Mathematics

Object Number:: 1985-277

type:: circular slide rule (acoustics)

credit:: Crosby, R.C.

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Circular slide rule

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