In case the Mayor is unable to perform the duties of his office by reason of temporary or continued absence or sickness, the said Council shall appoint by ballot, by a majority vote of all members thereof, one of their number to act in his stead, whose official designation shall be "Acting Mayor", and the councilman so appointed shall be vested with all powers, and shall perform all the duties of Mayor during such absence or sickness, and shall receive the salary of the Mayor during such vacancy; provided, that if such disability continue ten days or longer, during such absence in excess of ten days, the Mayor shall receive no salary provided, further, that the Councilman receiving compensation as Acting Mayor shall not receive his salary as Councilman for the same time he receives compensation as Acting Mayor.