fractional sampling; method of quartering; quartation
Archaic technical term for a sampling or assaying method that involves dividing material into four parts; also known as quartation. Rare in modern usage.
The method of quartering was once a technique used for ore analysis.
method of lunar calendar formulation
Historical term for a method used in formulating the lunar calendar. Limited to traditional calendar studies.
The quartering method is one of the old calculation methods used for creating the lunar calendar.
Compound of 四 (four), 分 (divide), and 法 (method). The exact historical derivation is uncertain; the term appears in technical contexts for quartering-based procedures.