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establish boards of arbitration whose duty it shall be to hear and determine all differences and controversies between laborers and their employers which may be submitted to them in writing by all the parties. Such boards of arbitration shall possess all the powers and authority in respect to administering oaths, subpoenaing witnesses, and compelling their attendance, preserving order during the sittings of the Board, punishing for contempt, and requiring the production of papers and writings, and all other powers and privileges, in their nature applicable, conferred by law on justices of the peace.
Sec. 8. The Commissioner of
