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Artifact Details

Title

Arithma

Catalog Number

XD125.80

Type

Physical object

Description

Simple mechanical calculator using complement arithmetic. "ADDIATOR" is printed on front of object. Handwritten on back of object is "Arthur H. Hall III". Hand scratched on back of object is "AHIII".

Date

1920 ca.

Manufacturer

R. C. Allen Company

Place Manufactured

Germany

Dimensions

overall: 1/8 in x 1 1/2 in x 6 3/8 in

Credit

Gift of Arthus Hall III

Lot Number