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WEIGHT. A quality in natural bodies, by which they tend towards the centre of the earth.
     2. Under the article Measure, (q.v.) it is said that by the constitution congress possesses the power "to fix the standard of weights and measures," and that this power has not been exercised.
     3. The weights now generally used in the United States, are the same as those of England; they are of two kinds:

     1. AVOIRDUPOIS WEIGHT. 1st. Used in almost all commercial transactions, and in the common dealings of life. 27 1/3 1/2 grains = 1 dram 16 drams = 1 ounce 16 ounces = 1 pound, (lb.) 28 pounds = 1 quarter, (qr.) 4 quarters = 1 hundred weight, (cwt.) 20 hundred weight = 1 ton. 2d. Used for meat and fish. 8 pounds = 1 stone 3d. Used in the wool trade.
     Cwt. qr. lb. 7 pounds = 1 clove 14 pounds = 1 stone = 0 0 14 2 stones = 1 tod = 0 1 0 6 1/2 tods = 1 wey = 1 2 14 2 weys = 1 sack = 3 1 0 12 sacks = 1 last = 39 0 0 4th. Used for butter and cheese. 8 pounds = 1 clove 56 pounds = 1 firkin.
     2. TROY WEIGHT. 24 grams = 1 pennyweight 20 pennyweights = 1 ounce 12 ounces = 1 pound.

     4. These are the denominations of troy weight, when used for weighing gold, silver and precious stones, except diamonds. Troy weight is also used by apothecaries in compounding medicines; and by them the ounce is divided into eight drams, and the drain into three scruples, so that the latter is equal to twenty grains. For scientific purposes, the grain only is used, and sets of weights are constructed in decimal progression, from 10,000 grains downward to one-hundredth of a grain. The caret, used for weighing diamonds, is three and one-sixth grains.
     5. A short account of the French weights and measures is given under the article Measure.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in classic literature ?
"Why, my master, and you, and I, are all to be weighed to-day!"
VOLUPTUOUSNESS, PASSION FOR POWER, and SELFISHNESS: these three things have hitherto been best cursed, and have been in worst and falsest repute-- these three things will I weigh humanly well.
Its area measures 6,032 feet; and its contents about 1,500 cubic yards; that is to say, when completely immersed it displaces 50,000 feet of water, or weighs 1,500 tons.
"What will the projectile weigh then?" asked Morgan.
"Yes, the moon, on whose surface objects weigh six times less than on the earth, a phenomenon easy to prove."
The jeweler took his magnifying-glass and scales, weighed and inspected them, and silently made his calculations.
Now, in getting under weigh, the station generally occupied by the pilot is the forward part of the ship.
Jingle, jingle, went the shillings, as handful after handful was thrown in, till, plump and ponderous as she was, they fairly weighed the young lady from the floor.
Tom's basket was weighed and approved; and he looked, with an anxious glance, for the success of the woman he had befriended.
Oh, light was the world that he weighed in his hands!
AN EAGLE was once captured by a man, who immediately clipped his wings and put him into his poultry-yard with the other birds, at which treatment the Eagle was weighed down with grief.
"Quite uncommon," I murmured; and George asked the old man how much he thought it weighed.