GLOVERSVILLE — The Fulton County Historical Society neither accepts nor dismisses the existence of ghosts.But they welcome believers.On Saturday, they’re bringing in the big guns. Several Oneida County-based ghost investigators are expected to probe the FCHS museum for paranormal activity before a live audience."The place is big so we can spread out," said Rich Nikodem, senior agent at Agent Paranormal. "There's different pieces of history in there that we can communicate with."Volunteers, board members and even FCHS Executive Director Samantha Hall-Saladino have reported eerie phenomena with the 123-year-old building: creepy sounds and lights turning on without explanation.The museum was given…