If the parties interested shall not agree as to the measurement of the timber in such boom, it shall be done by commissioners, appointed by the circuit court or the judge thereof in vacation, of the county in which such boom is located; or the same may be measured, if the parties so desire it, by the commissioners authorized to be appointed by section two of this article; the expenses of such commission, in either case, shall be paid by the party in error as to the measurement, and if both parties shall be found to be in error, such expenses shall be paid by them equally.