The National Capital Chapter will hold its 27th Annual C&O Canal Organ Grind and Music Box Demonstration in Potomac, MD. Sponsoring the event is Paul Senger. The event runs from 11:00 AM – 3:00 PM at the Chesapeake & Ohio Canal National Historic Park, Great Falls Tavern, 11710 Macarthur Blvd, Potomac, MD 20854. Contact Paul for setup instructions if you want to participate.