Tower Pound

By comparison, the modern U.S. standard pound is the same as the ''avoirdupois'' pound which is equal to 7000 grains or 16 ounces (454 grams).

Strangely, the word "ounce" is derived from the Latin word "uncia" which means "one twelfth" and twelve just happens to be the number of ounces in the Troy pound rather than the sixteen in the ''avoirdupois'' pound.

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Tower Pound

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