View of a rolling mill at the Homestead Steel Mill in Pittsburgh, Pennsylvania rolling a slab of steel into a thin plate. This photograph is one of a set of seven stereographs detailing the production of steel.
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“Rolling Slab into Thin Plate in Homestead Mill, 4th Stage in Plate Making.” Underwood & Underwood, n.d. Underwood & Underwood Stereographs of Manufacturing Industries. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/r494vk18s.
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