Real or immovable property consists of: (1) Land; (2) That which is affixed to land; (3) That which is incidental or appurtenant to land; (4) That which is immovable by law. Every kind of property that is not real is personal. Source: CivC 1877, §§ 163, 167; CL 1887, §§ 2679, 2683; RCivC 1903, §§ 186, 190; RC 1919, §§ 256, 260; SDC 1939, § 51.0102.