# assay ton

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assay ton
(AT)
a specialized unit of mass used by minerologists in assaying (testing) ores for the presence of gold, silver, platinum, uranium, or other valuable metals. One assay ton equals 29.1667 grams: just a little over an an ounce! The assay ton is actually a sample size. Since there are 87500/3 = 29166.7 troy ounces in a short ton (2000 lb), the number of milligrams of a precious metal in a sample of one assay ton is numerically equal to the number of troy ounces of that metal in one ton of raw ore. In Britain, the assay ton is based on the long ton and thus equals 98/3 = 32.6667 grams.

Dictionary of units of measurement. 2015.

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• Assay ton — Assay As*say , n. [OF. asai, essai, trial, F. essa. See {Essay}, n.] 1. Trial; attempt; essay. [Obs.] Chaucer. [1913 Webster] I am withal persuaded that it may prove much more easy in the assay than it now seems at distance. Milton. [1913… …   The Collaborative International Dictionary of English

• Assay ton — A weight of 29.166 + grams used in assaying, for convenience. Since it bears the same relation to the milligram that a ton of 2000 avoirdupois pounds does to the troy ounce, the weight in milligrams of precious metal obtained from an assay ton of …   The Collaborative International Dictionary of English

• assay ton — noun : a unit of weight of ore taken for assay equal to 29166 2/3 milligrams, the number of milligrams of precious metal in this amount of ore being equal to the number of troy ounces per 2000 pound ton * * * a unit of weight used in assaying ore …   Useful english dictionary

• assay ton — a unit of weight used in assaying ore, equivalent to 29.167 grams. [1880 85] * * * …   Universalium

• Assay — As*say , n. [OF. asai, essai, trial, F. essa. See {Essay}, n.] 1. Trial; attempt; essay. [Obs.] Chaucer. [1913 Webster] I am withal persuaded that it may prove much more easy in the assay than it now seems at distance. Milton. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

• Assay master — Assay As*say , n. [OF. asai, essai, trial, F. essa. See {Essay}, n.] 1. Trial; attempt; essay. [Obs.] Chaucer. [1913 Webster] I am withal persuaded that it may prove much more easy in the assay than it now seems at distance. Milton. [1913… …   The Collaborative International Dictionary of English

• Ton — Not to be confused with tonnage. For other uses, see Ton (disambiguation). The ton is a unit of measure. It has a long history and has acquired a number of meanings and uses over the years. It is used principally as a unit of weight, and as a… …   Wikipedia

• List of unusual units of measurement — For units of measure primarily used in countries where English is not the main language, see the article specific to that country, a list of which can be found in the systems of measurement article. An unusual unit of measurement is a unit of… …   Wikipedia

• weight — I (New American Roget s College Thesaurus) n. heaviness; heft; overweight, avoirdupois, tonnage, poundage; gravity; ballast; measurement; importance, influence; significance; pressure, load, burden. See quantity. v. ballast, load, burden; favor;… …   English dictionary for students

• gravity — I (New American Roget s College Thesaurus) I n. weight (see gravity); graveness, importance. Ant., lightness, unimportance. II Weight Nouns 1. gravity, gravitation; weight, weighing; heft, heaviness; ponderosity, pressure, burden; ballast,… …   English dictionary for students