(1) The party entitled to begin shall call his witnesses who, after taking an oath or affirmation in the form provided for by tre Third Schedule to this Code, shall be examined-in-chief by such other party and may be re-examined by the party beginning. (1). If a party wishes to give evidence on his own behalf, he shall do so before calling his witnesses and he shall then for all practical purposes be deemed to be a witness. (3). Witnesses shall giw evidence orally in open court, unless the court otherwise directs for good cause to be recorded. (4). The court may at any time put to a witness any question which appears necessary for the proper determination of the suit.