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Line 1: The '''apothecaries' system of mass''' is an obsolete system formerly used by [[apothecary\|apothecaries]] (now called [[pharmacist]]s or [[dispensing chemist\|chemists]]s) in English-speaking countries. The system was closely related to the [[troy system of mass]], having identically sized pounds and ounces, but the two systems differed in how the ounce was subdivided. Sometimes "ap" is added to the front of the unit to identify it as part of the apothecaries' system. Similar systems had been in use in other European countries. During the first half of the [[20th century]], the apothecaries' system was replaced by the [[metric system]].

Apothecaries' system: Difference between revisions