Denies that helping Richard Whitney got him business. Washington, D.C., Dec. 14. Charles E. Mitchell, Chairman of the Board of Blyth and Co. Inc., and former Chairman of the National City Bank of New York, testified before the Federal Monopoly Committee today that he was influential in having George Whitney appointed to the Board of Trustees of the consolidated Edison Co., but denied that this helped him obtain a $33,750,000 piece of consolidated financing. 'Like a lot of other people of the street, I claim a lot of things that are the bunk,' he said. 'Put those claims aside and base my getting the business on my long relationship with consolidated