An interesting subject to be sure, Androclese. Further info about the cannons can be found in the following site:
http://www.metropulse.com/news/2012/apr/25/battle-over-birthplace-adm-david-glasgow-farragut/ from which the paragraph which follows is drawn.
"Farragut, the man, has gotten a lot more attention here just lately. The Town of Farragut, America’s biggest municipality named for the admiral (there’s at least one other, in Iowa), has erected an impressive, larger-than-life bronze statue high on a pedestal, right beside Town Hall. There are other Farragut statues around the country, very prominent ones in New York, Washington, and Boston, but this one’s the newest. His visage is stern, the flap on his coat suggesting a sea breeze. Surrounding it, stone markers telling his story in chapters, with a
couple of genuine artifacts: the 32-pounder from the USS Independence, on which the teenage Farragut served just after the War of 1812, and a nine-inch Dahlgren cannon from Farragut’s own flagship, the Hartford."Tracy