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dram now meant only avoirdupois drams, which were 1 ⁄ 16 of an avoirdupois ounce. An ounce consisted of 437.5 grains, thus making the dram exactly 27.34375 grains. drachm now meant only apothecaries' drachms, which were 1 ⁄ 8 of an apothecaries' ounce of 480 grains, or equal to 60 grains.
The following other wikis use this file: Usage on bar.wikipedia.org Angloamerikanisches Maßsystem; Usage on de.wikipedia.org Angloamerikanisches Maßsystem
0.1 × ( 12 ÷ 8 ) = 0.15 grain per dscf when corrected to a gas having a specified reference CO 2 content of 12 volume %. Notes: Although ppmv and grains per dscf have been used in the above examples, concentrations such as ppbv (i.e., parts per billion by volume), volume percent, grams per dscm and many others may also be used.
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 ...
The grain was the legal foundation of traditional English weight systems, [5] and is the only unit that is equal throughout the troy, avoirdupois, and apothecaries' systems of mass. [6]: C-6 The unit was based on the weight of a single grain of barley which was equal to about + 4 ⁄ 3 the weight of a single grain of wheat.
λ: Gas mean free path (cm) D 50: Mass-median-diameter (MMD). The log-normal distribution mass median diameter. The MMD is considered to be the average particle diameter by mass. σ g: Geometric standard deviation. This value is determined mathematically by the equation: σ g = D 84.13 /D 50 = D 50 /D 15.87
In 1588 Queen Elizabeth increased the weight of the avoirdupois pound to 7000 grains and added the troy grain to the avoirdupois weight system. Prior to 1588, the "part" (1 ⁄ 16 ounce) was the smallest unit in the avoirdupois weight system. In the 18th century, the "part" was renamed "drachm".
The scruple is 8 ⁄ 175 of an ounce (or 1 ⁄ 24 of a troy ounce), 1 ⁄ 3 dram, or 20 grains: [1] it is therefore exactly 1.2959782 grams. The Roman scruple was 11.875% smaller, therefore being exactly 1.14208078875 grams.