Per Curiam:
The judgment is affirmed. Interstate Commerce Act, §15 (1) ; 15a (2) (41 Stat. 484, 488; 49 U. S. C. 15 (1), 15a (2) ); United States v. Louisiana, 290 U. S. 70, 75-77; Florida v. United States, 292 U. S. 1, 9.