[Fifteen-inch Rodman Gun, Battery Rodgers, Potomac River, Near Washington, D.C.]
Object type: Photograph
Department: Photographs
Artist: Mathew B. Brady|Unknown
Artist bio: American, born Ireland, 1823?–1896 New York| 
Artist role: Former Attribution|Artist
Artist nationality: American, born Ireland| 
Date: 1863–65
Medium: Albumen silver print from glass negative
Dimensions: 17.5 x 21 cm (6 7/8 x 8 1/4 in. )
Classification: Photographs
Credit line: Harris Brisbane Dick Fund, 1933
Accession year: 1933