Per Curiam:
Judgment affirmed. Louisville Gas Co. v. Coleman, 277 U. S. 32, 37, 40; Bell’s Gas R. Co. v. Pennsylvania, 134 U. S. 232, 237; Ohio Oil Co. v. Conway, 281 U. S. 146, 159; State Board of Tax Commissioners v. Jackson, 283 U. S. 527, 537, 538.