CC0 · no rights reserved
Conical Lens
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
Conical glass lens on a brass base designed to fit on an optical bench, with a "Wm. Grunow, New York" inscription. WIlliam Grunow (b. 1830) was a German-American optical instrument maker.
National Museum of American History’s own descriptionSubjects
Credit lineConical Lens. 1870-1895. Grunow, William. National Museum of American History, U.S. Military Academy. CC0.
