Artifact Details

Title

Circular Slide Rule

Catalog Number

X342.84

Type

Physical object

Date

ca. 1953

Manufacturer

Charles Bachman

Place Manufactured

U.S.

Dimensions

1/8 x 5 1/8 x 5 1/8 in.

Description

Circular slide rule consists of two handmade wheels, the smaller attached on top of the larger with handwritten numbers in pencil around the edges. An arrow is written in ink in the middle of the smaller wheel between handwritten lettering "O3" above and "LB-O(symbol)" below. A handwrtten note on the back reads "invented by / Charles W Bachman / circa 1953". Water stains appear on either side of note.

Category

Pre-computer: slide rule

Credit

Gift of Charles Bachman

Lot Number

X342.84