Artifact Details

Title

Calculex circular slide rule

Catalog Number

B158.81

Type

Physical object

Date

ca. 1910

Manufacturer

J. Halden and Company

Place Manufactured

U.K.

Dimensions

1/4 x 2 1/2 x 3 in.

Description

Circular slide rule consists of a circular slide rule and silver case. Slide rule consists of number wheel in setting with attached ring and metal disk in center, one side of which has stamped lettering "made in England" with "made" faded. The case has the remains of two stripes of yellow foam on the top with "Halden calculex" stamped in gold in the cloth liner inside.

Category

Pre-computer: slide rule

Collection Title

Gwen Bell artifact and book collection

Series Title

Pre-computing artifacts

Lot Number

B158.81