A 23-year-old Cornelia woman pleaded not guilty Friday morning in federal court to charges of manufacturing pipe bombs, receiving or possessing unregistered firearms and using controlled substances while possessing destructive devices. Celia Alchemy Savage was arrested on May 30 after a “concerned citizen” reported seeing what appeared to be explosive devices in Savage’s home, according to a press release from the office of U.S. Attorney Sally Quillian Yates. During the investigation, federal agents found that Savage had made several posts about explosives on her social networking site, including “There is no problem that cannot be solved by the use of high explosives.”