Several years ago I was removing equipment from an old foundry building here in my hometown. Records show that during the mid 1800's they manufactured armament (no discription given). On the floor next to the forge base I noticed that a steel plate had been attached to the floor. Upon removal I could see that the 3" wooden floor had been burned through. Further investigation revealed a 10"dia.56 lb.solid iron cannon ball that had apparently dropped on the floor and burned it's way through to the dirt below. I still have it and was wondering if anyone might have an idea of what type of artillery it might have been used in. Thanks