Public domain
Owens-Corning Fiberglas Corporation, Toledo, Ohio. Side view of a glass furnace melting the carefully compounded batch required for the production of Fiberglas thermal insulation being installed in the hulls of naval vessels now under construction
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineOwens-Corning Fiberglas Corporation, Toledo, Ohio. Side view of a glass furnace melting the carefully compounded batch required for the production of Fiberglas thermal insulation being installed in th. 1939-01-01. Palmer, Alfred T.. FSA/OWI Color Photographs, Library of Congress. Public domain.