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Surveyor's Vernier Compass
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
Gurley described this as "a most excellent and portable little instrument," noting that it "is especially useful for the surveyor of government lands." New, it cost $21. The rim is graduated to 30 minutes. The right side of the face is graduated to degrees, and numbered every 10 degrees from west to north, and from west to south. The outside of the box has a variation arc that extends ± 20 degrees, and that reads by folded vernier to 5 minutes. The U.S. Geological Survey, was established in 1879, and transferred this example it to the Smithsonian in 1907.
National Museum of American History’s own descriptionSubjects
Credit lineSurveyor's Vernier Compass. W. & L. E. Gurley. National Museum of American History, U.S. Geological Survey. CC0.
