Public domain
Rough grind of flawless glass. The first rough grinding of optical glass for the delicate aiming apparatus of the big guns. A large eastern arsenal turns these out as well as ammunition
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineRough grind of flawless glass. The first rough grinding of optical glass for the delicate aiming apparatus of the big guns. A large eastern arsenal turns these out as well as ammunition. 1942-01-01. United States. Office Of War Information, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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