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Rolling mills in Lower Yard at DuPont Brandywine powder yards
Horse-drawn gunpowder wagon Deadwood, South Dakota
Barksdale Works Box Packing House No. 3 and trestle
Interior of Saltpeter Refinery at Eleutherian Mills
Barksdale Works Dope House looking towards weighing room showing bins and Ferro inclave
Employees in New Machine Shop at Hagley Yard
Saltpeter refinery at Eleutherian Mills (Upper Yard)
Rolling mills, lower Hagley yard
Prismatic press
Rolling mills, Hagley Yard
Interior of Saltpeter Refinery at Eleutherian Mills

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