A worker shields his face during pig iron, casting, Workington, 1952.

ENGLAND - MAY 06: A batch of molten hematite pig iron is chanelled from a blast furnce on the level above on to the cast house floor where a worker uses a rod to clear any slag that will impede the flow. He shields his face from the intense heat produced . The Moss Bay works of the Workington Iron and Steel Company opened in 1856 and drew on abundant local resources : Cumberland coal from the mines and water from the River Derwent.. Workington Iron and Steel closed in 1981. Photograph by Walter Nurnberg, who transformed industrial photography after WWII by using film studio lighting techniques. (Photo by Walter Nurnberg/SSPL/Getty Images)