Each commission issued by the governor to a judge of the supreme court, upon the demand of such person, shall be delivered to him by the secretary of state. On or before the first day of his official term under such commission, the person to whom it is issued shall appear before the supreme court, or before a judge thereof if the court is not in session, and take the oath required by Section 7 of Article XV, Ohio Constitution and sections 3.22 and 3.23 of the Revised Code. The taking of such oath shall be shown by entry upon the journal of the supreme court.