Public domain
Hanna furnaces of the Great Lakes Steel Corporation, Detroit, Mich. Coal pusher apparatus with coal storage
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineHanna furnaces of the Great Lakes Steel Corporation, Detroit, Mich. Coal pusher apparatus with coal storage. 1939. Siegel, Arthur S.. FSA/OWI Color Photographs, Library of Congress. Public domain.