In Great Britain, at least as early as 1618 – 20th century, in apothecaries' fluid measure, a unit of liquid capacity = 2 fluid ounces, after 1824 about 56.83 milliliters. Also used as a kitchen measure.
George Urdang, editor.
Pharmacopeia londinensis of 1618, reproduced in facsimile, with an historical introduction.
Madison (WI): State Historical Society of Wisconisn, 1944.
Crawford's Handbook for the Grocery and Kindred Trades.
Edinburgh, Wm. Crawford & Sons, Ltd. 1922.
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Last revised: 8 April 2008.