Smithsonian - National Museum of American History, Behring Center

 
Physical Sciences Collection - Surveying and Geodesy

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Surveyor's Vernier Compass - click to enlarge

Surveyor's Vernier Compass - click to enlarge

Click photos to enlarge.

Surveyor's Vernier Compass

Catalogue number:
PH*333758

Inscriptions:
"KEUFFEL & ESSER CO NEW YORK"

Dimensions:
5 inches diameter

Discussion:

Keuffel & Esser described this as a "Surveying Compass, with folding sights, graduated to degrees on raised ring, variation plate, [and] two spirit levels." The variation arc at the north end of the face extends 45 degrees either way, and reads by double vernier to 6 minutes. With polished mahogany case (here missing), this compass cost $18. K & E advertised compasses of this sort from the early 1900s through the 1940s, and donataed this example to the Smithsonian in 1972.

Ref: Keuffel & Esser, Catalogue (New York, 1906), p. 420.

Further Information:

Keuffel & Esser
Surveyor's Compass

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