Artifact Details

Title

Thacher's calculating instrument

Catalog Number

B56.80

Type

Physical object

Date

c. 1903

Manufacturer

Keuffel & Esser Company

Place Manufactured

N.Y., U.S.

Identifying Numbers

Other number 40135870 on base

Dimensions

6 3/4 x 24 1/2 x 7 in.

Description

Instruction manual located in Object File. The drum of the instrument is in good condition. However, the "arm" of the piece has been shattered and the lens is now loose. Both the lens and the shards of the arms are contained in separate envelopes within the instrument's case.

Category

Pre-computer: slide rule

Lot Number

B56.80