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  2. American Gold Eagle - Wikipedia

    en.wikipedia.org/wiki/American_Gold_Eagle

    Offered in 1/10 oz, 1/4 oz, 1/2 oz, and 1 oz denominations, these coins are guaranteed by the U.S. government to contain the stated amount of actual gold weight in troy ounces. By law, the gold must come from sources in the United States, alloyed with silver and copper to produce a more wear-resistant coin.

  3. Troy weight - Wikipedia

    en.wikipedia.org/wiki/Troy_weight

    The only troy weight in widespread use is the British Imperial troy ounce and its American counterpart. Both are based on a grain of 0.06479891 gram (exact, by definition), with 480 grains to a troy ounce (compared with 437 + 12 grains for an ounce avoirdupois). The British Empire abolished the 12-ounce troy pound in the 19th century.

  4. Grain (unit) - Wikipedia

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

    A box of .38 Special (9.1 mm) cartridges that have 148-grain (9.6 g) bullets. Grains are commonly used to measure the mass of bullets and propellants. [11] [12] In archery, the grain is the standard unit used to weigh arrows.

  5. Gram - Wikipedia

    en.wikipedia.org/wiki/Gram

    The gram (originally gramme; [1] SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one thousandth of a kilogram.. Originally defined as of 1795 as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre [1 cm 3], and at the temperature of melting ice", [2] the defining temperature (≈0 °C) was later changed to 4 ...

  6. Ounce - Wikipedia

    en.wikipedia.org/wiki/Ounce

    The ounce (/ ˈ aʊ n s /) is any of several different units of mass, weight, or volume and is derived almost unchanged from the uncia, an Ancient Roman unit of measurement.. The avoirdupois ounce (exactly 28.349523125 g) is 1 ⁄ 16 avoirdupois pound; this is the United States customary and British imperial ounce.

  7. Pao (unit) - Wikipedia

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

    [2] [3] The pao was recorded in the Bengal Presidency in 1850, but was not considered to be an integral part of the local system of weights. It was equal to four chitaks, and hence a quarter of a seer: the equivalent Imperial weight at the time was given as 7 oz. 10 dwt. Troy (233.3 grams). [4]

  8. Apothecaries' system - Wikipedia

    en.wikipedia.org/wiki/Apothecaries'_system

    The weight of an apothecaries' pound was 345.1 g in Spain and 344.2 g in Portugal. As in Italy, some of the additional subdivisions of the Roman system, such as the obolo , were still in use there. It was standard to use the marco , defined as 8 ounces, instead of the pound.

  9. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The solar flux unit is a unit of spectral irradiance equal to 10 −22 W⋅m −2 ⋅Hz −1 (100 yW⋅m −2 ⋅Hz −1). The nox (nx) is a unit of illuminance equal to 1 millilux ( 1 mlx ). The nit (nt) is a unit of luminance equal to one candela per metre squared ( 1 cd⋅m −2 ).