PER CURIAM:
The order of the lower court granting appellees’ petition to refer the dispute to arbitration is affirmed with the following modification: the case is remanded so that, pursuant to the Act of April 25,1927 P.L. 381, No. 248, § 4, 5 P.S. § 164, the lower court may appoint a board of arbitrators, who shall hear the dispute.