Within one hour from the time of withdrawing as aforesaid, the parties shall deliver to the presiding officer of the Senate the names of the said four members of the Senate and nine of the House of Representatives remaining on the list, who shall then respectively take an oath or affirmation, to be administered by the presiding officer of the Senate, to try the matter of the petition and to give a true judgment thereon according to the evidence, unless the committee shall be dissolved.
25 P.S. § 3320