Circular slide rule (two cardboard discs with radi

Made:
1959-1960 in Maywood and Chicago

Circular slide rule (two cardboard discs with radial transparent plastic cursor) by General Industrial Co.1788 Montrose, Chicago 13,Illinois, also marked Slide Chart Corp., 1959, Perrygraf, Marywood, Illinois

Details

Category:
Mathematics
Object Number:
2001-12
Materials:
card, complete, metal, plastic
type:
circular slide rule
credit:
Dr J. B. Harris
status:
Permanent collection

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