Public domain
Production. Milling machines and machine castings. Machine tools are nearly 100 percent metal, and a large portion of that is high-grade cast iron, made from carefully combined scrap steel, scrap iron and pig iron. These are steel rail-ends waiting in the open yard behind the foundry of the world's
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineProduction. Milling machines and machine castings. Machine tools are nearly 100 percent metal, and a large portion of that is high-grade cast iron, made from carefully combined scrap steel, scrap iron. 1942-01-01. United States. Office For Emergency Management, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.