This small collection of John W. Macklem (1867-1948) contains photographs of structures in the Hagley Yards after they closed in 1921, DuPont Company office staff in Equitable Building, Wilmington, Delaware, and gunpowder labels for A.F. & Co. FF gunpowder and DuPont superfine HFg gun powder.

Watson C. Warriner Sr. (1917-2015) was a chemical engineer with E.I. du Pont de Nemours & Company during World War II. He worked on the Manahatten Project. This item is a typescript of a personal memoir of Warriner's work at the Hanford Engineer Works and the DuPont Works in connection with the Manhattan Project, including maps and photographs.