E.I. du Pont de Nemours & Company was established in 1802. The du Pont family purchased a mill site on the banks of the Brandywine River just North of Wilmington, Delaware for the production of black powder. In 1902 the DuPont Company acquired the Smith Electric Fuze Company and some other properties in the Pompton Lakes, New Jersey area. The DuPont Company also operated a dynamite plant near Hancock, Michigan. This collection consists of snapshot photographs from the works at Pompton Lakes, New Jersey, and others from a plant in Michigan, most likely the Senter dynamite works near Hancock, Michigan.