Public domain
Fiberglass manufacture, Owens-Corning, Toledo, Ohio. Intense heat is needed to melt the inorganic ingredients of the batch from which fiberglass insulating wool is manufactured. Twenty-four hours a day, seven days a week, this gas-fired furnace maintains the temperatures required in the process
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Credit lineFiberglass manufacture, Owens-Corning, Toledo, Ohio. Intense heat is needed to melt the inorganic ingredients of the batch from which fiberglass insulating wool is manufactured. Twenty-four hours a da. 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.
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