The ounce is a unit of measurement of the avoirdupoisscaleequivalent to 16 drams or 28.350 grams. Its precise weight was fixed by Henry III, who decreed in 1233, that an English ounce should be 640 dry grains of wheat; that twelve of these ounces should be a pound; and that eight pounds should be a gallon of wine. Research Ounce
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Research Ounce
