Agent exceeding authority--Liability of principal

When an agent exceeds his authority, his principal is bound by his authorized acts so far only as they can be plainly separated from those which are unauthorized. Source: CivC 1877, § 1369; CL 1887, § 3992; RCivC 1903, § 1688; RC 1919, § 1270; SDC 1939, § 3.0302.