Note that a pound of gold is 12 troy ounces, while a pound of feathers is 16 avoirdupois ounces. So one of my favorite pedantic bits of trivia is that an ounce

Note that a pound of gold is 12 troy ounces, while a pound of feathers is 16 avoirdupois ounces. So one of my favorite pedantic bits of trivia is that an ounce of gold is heavier than an ounce of feathers but a pound of gold is lighter than a pound of feathers.