Note 19 — 10th-Century Surgical Treatise

For a more accurate estimate of the equivalence of "dirham" according to the area in which the measurement was taken, the reader may consult Walter Hinz, Islamische Masse und Gewichte umgerechnet ins metrische System, Leiden, 1955, pt. 1, pp. 2-8; and George C. Miles, Early Arabic Glass Weights and Stamps, New York, 1948, p. 6.