Statistics for occurrence #1 of “Parrott” in chapter 6 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:

... aqueduct, one by Long Bridge, and one by water to Alexandria. The smooth-bore guns in the armament of Fort Corcoran were two 8-inch howitzers en barbette. The rifled guns consisted of three 3-inch Parrott s en embrasure. The term en barbette refers to the placing of a gun so that the muzzle projected over a wall. En embrasure indicates a cannon in an opening in the fortification with no protection ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Parrott (Virginia, United States) 26 2 0 0 0 user votes
Parrott (Georgia, United States) 4 0 0 0 0 user votes
Parrott (Colorado, United States) 0 0 0 0 0 user votes
Parrott (Ohio, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.