ATLANTIC CITY ELECTRIC CO. v. UNITED STATES

James O'Malley, Jr., argued the cause for appellants in No. 78. With him on the briefs were Louis J. Lefkowitz, Attorney General of New York, Walter J. Myskowski, Sheila H. Marshall, and Alfred E. Froh. Charles J. McCarthy argued the cause for appellants in No. 106. With him on the briefs were Arthur L. Winn, Jr., J. Raymond Clark, and Richard J. Hardy. Deputy Solicitor General Springer argued the cause for the United States et al. in both cases. With him on the brief were Solicitor General Griswold, Assistant Attorney General McLaren, Howard E. Shapiro, Edward M. Shulman, William A. Imhof, Robert W. Ginnane, and Arthur J. Cerra. Hugh B. Cox argued the cause for appellees Aberdeen Rockfish Railroad Co. et al. in both cases. With him on the brief were William H. Allen and Michael Boudin. John F. Donelan and John M. Cleary filed a brief in No. 106 for the National Industrial Traffic League as amicus curiae urging reversal.