NEWSPreserving images at UDDebra Norris, chair and professor for the Department of Chemical & Biomolecular Engineering at the University of Delaware, shows some of the old photographs that are being preserved.Suchat Pederson/The News JournalDebra Norris, chair and professor for the Department of Chemical & Biomolecular Engineering at the University of Delaware, shows some of the old photographs that are being preserved.Suchat Pederson, The News JournalDebra Norris, chair and professor for the Department of Chemical & Biomolecular Engineering at the University of Delaware, shows a damaged silver nitrate image.Suchat Pederson/The News JournalDebra Norris, chair and professor for the Department of Chemical & Biomolecular Engineering at the University of Delaware, shows some of the old photographs that are being preserved.Suchat Pederson/The News JournalDebra Norris, chair and professor for the Department of Chemical & Biomolecular Engineering at the University of Delaware, shows some of the old photographs that are being preserved.Suchat Pederson/The News JournalDebra Norris, chair and professor for the Department of Chemical & Biomolecular Engineering at the University of Delaware, shows some of the old photographs that are being preserved.Suchat Pederson/The News JournalDebra Norris, chair and professor for the Department of Chemical & Biomolecular Engineering at the University of Delaware, shows some of the old photographs that are being preserved.Suchat Pederson/The News JournalDebra Norris, chair and professor for the Department of Chemical & Biomolecular Engineering at the University of Delaware, shows some of the old photographs that are being preserved.Suchat Pederson/The News Journal