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

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Surveyor's Vernier Compass

Catalogue number:
2000.0241.01

Inscriptions:
"Wm. J. Young Maker 3641 Philadelphia"

Dimensions:
length 16 inches; needle 6 inches

Discussion:

This compass was made by William J. Young, and dates from around 1859. The face is dark, and the needle ring is silvered. There is an outkeeper on the face at west, and a circular level at east. The variation arc on the north arm extends 20 degrees either way, and reads by vernier to single minutes. The arms are unusually thick, making the compass unusually heavy. The box is marked "J. H. Marvin Lexington Ky."

Further Information:

Surveyor's Compass
Young

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