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Rolling mills, Hagley Yard
Eleutherian Mills Yard of E.I. du Pont de Nemours & Co., looking toward saltpeter refinery
Rolling mill ruins, Hagley Yard
DuPont Co. First Office with Conestoga powder wagon
Steam Plant at Brandywine powder yards
Conestoga wagon train in Hagley Yard
Interior of Saltpeter Refinery at Eleutherian Mills

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