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Gold uses Troy weights unless otherwise specified, while feathers use the normal system. The Troy ounce is heavier than the normal ounce, but the Troy pound is 12 Troy ounces, not 16.

Also, the Troy weights are a measure of mass, I think, not actual weight, so if you went to the moon, an ounce of gold would be lighter than an ounce of feathers.



Huh, I didn't know that.

...gold having its own measurement system is really silly.


Every traded object had its own measurement system: it pretty much summarizes the difference between Imperial measures and US Customary measures.


> Every traded object had its own measurement system

In US commodities it kind of still does: they're measured in "bushels" but it's now a unit of weight. And it's a different weight for each commodity based on the historical volume. http://webserver.rilin.state.ri.us/Statutes/TITLE47/47-4/47-...

The legal weights of certain commodities in the state of Rhode Island shall be as follows:

(1) A bushel of apples shall weigh forty-eight pounds (48 lbs.).

(2) A bushel of apples, dried, shall weigh twenty-five pounds (25 lbs.).

(3) A bushel of apple seed shall weigh forty pounds (40 lbs.).

(4) A bushel of barley shall weigh forty-eight pounds (48 lbs.).

(5) A bushel of beans shall weigh sixty pounds (60 lbs.).

(6) A bushel of beans, castor, shall weigh forty-six pounds (46 lbs.).

(7) A bushel of beets shall weigh fifty pounds (50 lbs.).

(8) A bushel of bran shall weigh twenty pounds (20 lbs.).

(9) A bushel of buckwheat shall weigh forty-eight pounds (48 lbs.).

(10) A bushel of carrots shall weigh fifty pounds (50 lbs.).

(11) A bushel of charcoal shall weigh twenty pounds (20 lbs.).

(12) A bushel of clover seed shall weigh sixty pounds (60 lbs.).

(13) A bushel of coal shall weigh eighty pounds (80 lbs.).

(14) A bushel of coke shall weigh forty pounds (40 lbs.).

(15) A bushel of corn, shelled, shall weigh fifty-six pounds (56 lbs.).

(16) A bushel of corn, in the ear, shall weigh seventy pounds (70 lbs.).

(17) A bushel of corn meal shall weigh fifty pounds (50 lbs.).

(18) A bushel of cotton seed, upland, shall weigh thirty pounds (30 lbs.).

(19) A bushel of cotton seed, Sea Island, shall weigh forty-four pounds (44 lbs.).

(20) A bushel of flax seed shall weigh fifty-six pounds (56 lbs.).

(21) A bushel of hemp shall weigh forty-four pounds (44 lbs.).

(22) A bushel of Hungarian seed shall weigh fifty pounds (50 lbs.).

(23) A bushel of lime shall weigh seventy pounds (70 lbs.).

(24) A bushel of malt shall weigh thirty-eight pounds (38 lbs.).

(25) A bushel of millet seed shall weigh fifty pounds (50 lbs.).

(26) A bushel of oats shall weigh thirty-two pounds (32 lbs.).

(27) A bushel of onions shall weigh fifty pounds (50 lbs.).

(28) A bushel of parsnips shall weigh fifty pounds (50 lbs.).

(29) A bushel of peaches shall weigh forty-eight pounds (48 lbs.).

(30) A bushel of peaches, dried, shall weigh thirty-three pounds (33 lbs.).

(31) A bushel of peas shall weigh sixty pounds (60 lbs.).

(32) A bushel of peas, split, shall weigh sixty pounds (60 lbs.).

(33) A bushel of potatoes shall weigh sixty pounds (60 lbs.).

(34) A bushel of potatoes, sweet, shall weigh fifty-four pounds (54 lbs.).

(35) A bushel of rye shall weigh fifty-six pounds (56 lbs.).

(36) A bushel of rye meal shall weigh fifty pounds (50 lbs.).

(37) A bushel of salt, fine, shall weigh fifty pounds (50 lbs.).

(38) A bushel of salt, coarse, shall weigh seventy pounds (70 lbs.).

(39) A bushel of timothy seed shall weigh forty-five pounds (45 lbs.).

(40) A bushel of shorts shall weigh twenty pounds (20 lbs.).

(41) A bushel of tomatoes shall weigh fifty-six pounds (56 lbs.).

(42) A bushel of turnips shall weigh fifty pounds (50 lbs.).

(43) A bushel of wheat shall weigh sixty pounds (60 lbs.).


Why are you being downed!? This list is the best!


More specifically it's a "precious metals" system, not just gold.


> Gold uses Troy weights unless otherwise specified, while feathers use the normal system.

“avoirdupois” (437.5 grain). Both it and troy (480 grain) ounces are “normal” for different uses.




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