624.2  Ordinary actions — evidence on appeal.
  Upon appeal, in ordinary actions no evidence shall go to the appellate court except such as may be necessary to explain any exception taken in the cause, and such court shall hear and try the case only on the legal errors so presented.
[R60, §2999; C73, §2741; C97, §3651; C24, 27, 31, 35, 39, §11431; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §624.2]
Iowa Constitution, Art. V, §4