opinion: KOLLER et al. v. UNITED STATES.
  No. 362.
  Argued March 26, 30, 1959.
  Decided April 20, 1959.
  Robert H. Malis argued the cause and filed a brief for petitioners.
  Lionel Kestenbaum argued the cause for the United States. On the brief were Solicitor General Rankin, Assistant Attorney General Doub and Samuel D. Slade.
  Per Curiam.
  The judgment is affirmed. Rex Trailer Co. v. United States, 350 U. S. 148 (1956).