International Journal of Naval History

 Photo Captions and Credits.

1. John A. Dahlgren. Library of Congress.

2. Merrimac sinks Cumberland. Naval Historical Center.

3. Monitor versus Merrimac. Naval Historical Center.

4. Fifteen-inch Rodman gun at Battery Rodgers, Alexandria, Virginia. National Archives.

5. Top to Bottom: 9-, 11-, and 15-inch guns (approximately to scale). Robert J. Schneller, Jr., A Quest for Glory: A Biography of Rear Admiral John A. Dahlgren (Annapolis: Naval Institute Press, 1996), 209.

6. Left to Right: 15-inch Dahlgren smoothbore, Brooke rifle (caliber unknown), 8-inch Parrott rifle, 150-pounder Armstrong rifle, 32-pounder smoothbore (model unknown), and Dahlgren smoothbore (caliber unknown) at Pencote Battery. National Archives.

7. Iron Plates Used in Ordnance versus Armor Tests, Washington Navy Yard. Naval Historical Center.

8. Fifteen-inch Dahlgren Gun at Pencote Battery. Library of Congress.

9. Eleven-inch Dahlgren Gun on board USS Kearsarge. Naval Historical Center.