314 A.2d 36 Peoples Gas System, Inc., Appellant, v. Commonwealth of Pennsylvania, Board of Finance and Revenue, Appellee. Commonwealth Court of Pennsylvania.Argued September 7, 1973 January 18, 1974. Taxation — Foreign corporation — Foreign Franchise Tax Act, Act 1889, June 1, P. L. 420 — Corporate Net Income Tax Act, Act 1935, May 16, P. […]