Representatives of a Philadelphia financial advising firm sat in on a meeting of the Carbon County Solid Waste Authority. Pat O'Connell and Gordon Walker of Butcher and Singer Inc. were instructed to prepare a list of about five Philadelphia and Harrisburg law first which serve as bond counsel for projects of the type now being completed as the county's first landfill site in the Palmerton area. Harold Rabenold, chairman of the Solid Waste Authority, presided at the session.