Per Curiam.
Affirmed upon the authority, of *632Washington Securities Co. v. United States, 234 U. S. 76, 78; Baker v. Schofield, 243 U. S. 114, 118; Southern Ry. Co. v, Puckett, 244 U. S. 571, 574; Piedmont & G. C. Coal Co. v. Seaboard Fisheries Co., 254 U. S. 1, 13.
Mr. David V. Cahill, with whom Mr. Joseph A. Burdeau was on the brief, for appellants. Solicitor General Mitchell, Assistant Attorney General Willebrandt, and Mr. Arthur W. Henderson for the United States.