I recently read a series of interesting articles in the Star Beacon on silos. I'm not sure where the paper is because a friend sent me the clippings (it might be in Ohio), but I learned that silos were made of wood, brick, or concrete. They're no longer practical, and few are being restored, though I've seen them remodeled into homes on HGTV. (It's amazing what you can turn into a house.) Being from Wisconsin I remember silos and the smell of silage, which I like, though I suspect it's an acquired taste.