A metal protractor with a half circle head and an attached handle with an arm that swings around the edge of the circle to accurately take measurements.
A metal protractor with a half circle head and an attached handle with an arm that swings around the edge of the circle to accurately take measurements.
Number Of Parts
1
Provenance
This artifact was used by the donor's uncle Dr. Walter Barnhart during the 1920s to the 1940s in his personal lab; possibly for arthritis research.
The donor states that it was used from the 1920s through to the 1940s; identical item on website dated to 1930s.
Material
metal: silver
Inscriptions
Measurement numbers from 1 to 180 degrees going both ways on the circular edge; "No 19 // THE L.S. STARRETT CO. // ATHOL. MASS. U.S.A." engraved on the protractor; "READ INSIDE SCALE // READ OUTSIDE SCALE" written in pen on a piece of tape on the handle