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  2. Apothecaries' system - Wikipedia

    en.wikipedia.org/wiki/Apothecaries'_system

    English-speaking countries also used a system of units of fluid measure, or in modern terminology volume units, based on the apothecaries' system. Originally, the terms and symbols used to describe the volume measurements of liquids were the same as or similar to those used to describe weight measurements of solids [33] (for example, the pound by weight and the fluid pint were both referred to ...

  3. Tola (unit) - Wikipedia

    en.wikipedia.org/wiki/Tola_(unit)

    It was also used in Aden and Zanzibar: in the latter, one tola was equivalent to 175.90 troy grains (0.97722222 British tolas, or 11.33980925 grams). [2] The tola is a Vedic measure, with the name derived from the Sanskrit तोलः tolaḥ (from the root तुल् tul) meaning "weighing" or "weight". [3]

  4. Troy weight - Wikipedia

    en.wikipedia.org/wiki/Troy_weight

    One-troy-ounce (480 gr; 31 g) samples of germanium, iron, aluminium, rhenium and osmium A Good Delivery silver bar weighing 1,000 troy ounces (83 troy pounds; 31 kg) Troy weight is a system of units of mass that originated in the Kingdom of England in the 15th century [ 1 ] and is primarily used in the precious metals industry.

  5. Grain (unit) - Wikipedia

    en.wikipedia.org/wiki/Grain_(unit)

    Since the implementation of the international yard and pound agreement of 1 July 1959, the grain or troy grain (symbol: gr) measure has been defined in terms of units of mass in the International System of Units as precisely 64.798 91 milligrams. [6]: C-19 [9] One gram is thus approximately equivalent to 15.432 36 grains. [6]:

  6. Biblical and Talmudic units of measurement - Wikipedia

    en.wikipedia.org/wiki/Biblical_and_Talmudic...

    Moses mandated that the standard coinage would be in single shekels of silver; thus each shekel coin would constitute about 15.86 grams (0.51 troy ounces) of pure silver. In Judea, the Biblical shekel was initially worth about 3⅓ denarii , but over time the measurement had enlarged so that it would be worth exactly four denarii.

  7. Pennyweight - Wikipedia

    en.wikipedia.org/wiki/Pennyweight

    A pennyweight (dwt) is a unit of mass equal to 24 grains, 1 ⁄ 20 of a troy ounce, 1 ⁄ 240 of a troy pound, approximately 0.054857 avoirdupois ounce [1] and exactly 1.55517384 grams. [2] It is abbreviated dwt , d standing for denarius – (an ancient Roman coin), and later used as the symbol of an old British penny (see £sd ).

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  9. Coin grading - Wikipedia

    en.wikipedia.org/wiki/Coin_grading

    Troy weight (The system used with coins and precious metals. One troy ounce (ozt) is exactly 31.1034768 grams, about 10 percent more than the avoirdupois ounce, which is exactly 28.349523125 g.) One troy ounce (ozt) is exactly 31.1034768 grams, about 10 percent more than the avoirdupois ounce, which is exactly 28.349523125 g.)