This object is on display in the Time and Navigation exhibition at the National Mall building.
Transferred from the Department of Commerce, Bureau of Standards
Air Ministry Laboratory
Date: ca. 1920
Country of Origin: United Kingdom
Dimensions: 3-D (Steel Tube): 23.2 x 7.3cm (9 1/8 x 2 7/8 in.)
Materials: steel, brass, plastic, paper
Physical Description:60mm diameter, 235mm long; telescoping slide rule; ca.1920; cardboard.
Inventory number: A19570955000