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Avoirdupois is a system of mass based on a pound of 16 ounces, while Troy weight is the system of mass where 12 troy ounces equals one troy pound. The symbol g 0 is used to denote standard gravity in order to avoid confusion with the (upright) g symbol for gram.
The original mercantile pound of 25 shillings or 15 (Tower) ounces was displaced by, variously, the pound of the Hanseatic League (16 tower ounces) and by the pound of the then-important wool trade (16 ounces of 437 grains). A new pound of 7,680 grains was inadvertently created as 16 troy ounces, referring to the new troy rather than the old ...
A fluid ounce (abbreviated fl oz, fl. oz. or oz. fl.) is a unit of volume. An imperial fluid ounce is defined in British law as exactly 28.4130625 millilitres, [15] while a US customary fluid ounce is exactly 29.5735295625 mL, [16] and a US food labelling fluid ounce is 30 mL. [17]
The use of a quarter-seer weight in Ahmedabad had also been noted in a British East India Company survey of South Asian metrology carried out in 1821: the name of the unit was not recorded, but it would have been equivalent to 4 oz. 3 dr. 17 gr. avoirdupois (119.8 grams) based on the measurement of the Ahmedabad seer. [5]
15 oz tower = 6750 gr ≈ 437.4 g London/Mercantile pound 15 oz troy = 16 oz tower = 7200 gr ≈ 466.6 g Mercantile stone 12 lb L ≈ 5.6 kg Butcher's stone 8 lb ≈ 3.63 kg Sack 26 st = 364 lb ≈ 165 kg The carat was once specified as four grains in the English-speaking world.
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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.
Irish gold pistole, bearing its weight (4 dwt 7 gr) (National Museum of Ireland – Decorative Arts and History). 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]