Public domain
Steel manufacture, Allegheny-Ludlum. Here is a row of charging boxes loaded with limestone, the main ingrediant in the production of quality steel. These boxes will shortly dump their loads into open hearth furnaces
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineSteel manufacture, Allegheny-Ludlum. Here is a row of charging boxes loaded with limestone, the main ingrediant in the production of quality steel. These boxes will shortly dump their loads into open . 1940-01-01. United States. Office For Emergency Management, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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