apothecaries weight

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apothecaries weight:

see English units of measurementEnglish units of measurement,
principal system of weights and measures used in a few nations, the only major industrial one being the United States. It actually consists of two related systems—the U.S.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Apothecaries’ Weight


system of measurement used in weighing medicines.

The basic unit was the apothecaries’ pound (Latin libra, abbreviated lb), divided into 12 ounces. One ounce (uncia) contained 8 drachmae, 1 drachma contained 3 scrupula, 1 scrupulum contained 20 grana.

The Russian apothecaries’ pound = 358.323 grams; 1 ounce = 29.860 grams; 1 drachma = 3.732 grams; 1 scrupulum = 1.244 grams; 1 granum = 62.209 milligrams.

In the English system of measurement (used in Great Britain, the USA, and several other countries) 1 apothecaries’ pound (ap) = 373.242 grams; one ounce (ap oz) = 31.1035 grams; 1 drachma (ap drach) = 3.88793 grams; 1 scrupulum (scruple) = 1.29598 grams; 1 granum (gr) = 64.7989 milligrams. Apothecaries’ weight has been replaced by metric measures in most countries.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.