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Source: 'The Sound of Freedom: Naval Weapons Technology at Dahlgren, Virginia,' by James P. Rife and Rodney P. Carlisle
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Capt. John Adolphus Bernard Dahlgren (1809-1870), known as the "Father of U.S. Naval Ordnance," shown here during the Civil War aboard the USS Pawnee with a 50-pounder Dahlgren gun. Note the characteristic "bottle" shape of the barrel. (Library of Congress) |
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