Photo: Brian Ireley, Smithsonian
A box of gun cotton (cotton treated with nitric acid) carrying the brand name "Anthony's Snowy Cotton," a photo processing supply that a Civil War-era photographer might use in the field to create collodion photographs. The item is part of the photo exhibition to commemorate the 150th anniversary of the Civil War, “Experience Civil War Photography: From the Home Front to the Battlefront,” on display in the Smithsonian Castle in Washington, D.C. beginning Aug. 1, 2012.
