Public domain
Conversion. Copper and brass processing. When "slabs" (brass or copper castings in the form of long flat cakes) are being passed rolls, the first step in making sheet metal. A series of passes back and forth through various rolls reduces the "slabs" to thickness desired. Chase Copper and Brass Compa
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineConversion. Copper and brass processing. When "slabs" (brass or copper castings in the form of long flat cakes) are being passed rolls, the first step in making sheet metal. A series of passes back an. 1942-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.