Slide rule for electrical calculations with one sl

Made:
1957 in Illinois

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Slide rule for electrical calculations with one slider, cardboard, made 1957 by Perrygraf, Illinois for Sigma Instruments, Massachusetts

Details

Category:
Mathematics
Object Number:
1985-264
type:
slide rule (electrical engineering)
credit:
Crosby, R.C.
status:
Permanent collection

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