If neither part can be considered the principal, within the rule prescribed by the last section, the more valuable, or, if the values are nearly equal, the more considerable in bulk, is to be deemed the principal part.
Cal. Civ. Code § 1027
Accession to Personal Property
Enacted 1872.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.