Photo #: NH 59241
Washington Navy Yard, District of Columbia
Line engraving published in "Frank Leslie's Illustrated",
1861, depicting the interior of the Practice Battery near the
Navy Yard's waterfront.
Guns shown include (from left to right): Cochran's breech-loading
gun; a XI-inch Dahlgren smoothbore gun; and a Dahlgren rifled
gun.
U.S. Naval Historical Center Photograph.
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