A party aggrieved by the alleged failure, neglect, or refusal of another to arbitrate under a written agreement for arbitration may petition any United States district court which, save for such agreement, would have jurisdiction under title 28, in a civil action or in admiralty of the subject matter of a suit arising out of the controversy between the parties, for an order directing that such arbitration proceed in the manner provided for in such agreement. Five days’ notice in writing of such application shall be served upon the party in default. Service thereof shall be made in the manner provided by the Federal Rules of Civil Procedure. The court shall hear the parties, and upon being satisfied that the making of the agreement for arbitration or the failure to comply therewith is not in issue, the court shall make an order directing the parties to proceed to arbitration in accordance with the terms of the agreement. The hearing and proceedings, under such agreement, shall be within the district in which the petition for an order directing such arbitration is filed. If the making of the arbitration agreement or the failure, neglect, or refusal to perform the same be in issue, the court shall proceed summarily to the trial thereof. If no jury trial be demanded by the party alleged to be in default, or if the matter in dispute is within admiralty jurisdiction, the court shall hear and determine such issue. Where such an issue is raised, the party alleged to be in default may, except in cases of admiralty, on or before the return day of the notice of application, demand a jury trial of such issue, and upon such demand the court shall make an order referring the issue or issues to a jury in the manner provided by the Federal Rules of Civil Procedure, or may specially call a jury for that purpose. If the jury find that no