Artifact Details

Title

Smith's Improved Protractor

Catalog Number

X243.83A-D

Type

Physical object

Manufacturer

Dietzen Company

Place Manufactured

U.S.

Identifying Numbers

Model number Smith's Improved Protractor

Dimensions

1 1/4 x 11 x 7 1/2 in.

Description

Large accurate metal protractor. This item comprises four pieces: A: Case (velvet lining and padding) B: Main protractor element C: Ruler attachment D: Ruler attachment.. Dimension are of the case.. Patented 11/29/1910

Category

pre-computer : slide rule

Credit

Gift of University of Illinois, Department of Computer Sciences

Lot Number

X243.83A-D