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Tripod Head
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
Patent model for William Gurley, “Tripod-Head for Surveying Instruments,” U.S. Patent 209,562 (Nov. 5, 1878). William Gurley was a mathematical instrument maker in Troy, New York.
National Museum of American History’s own descriptionSubjects
Credit lineTripod Head. W. & L. E. Gurley. National Museum of American History. CC0.
