If neither part can be considered the principal within the rule prescribed by § 43-34-3, the more valuable, or if the values are nearly equal, the more considerable in bulk, is to be deemed the principal part.

Source: CivC 1877, § 592; CL 1887, § 3215; RCivC 1903, § 908; RC 1919, § 510; SDC 1939, § 51.1201.