There are 14 5/8 or 5/9 Troy ounces in one pound Avoirdupois, and 12 Troy ounces in one pound Troy. One pound Avoirdupois weighs 454 grams and one pound Troy weighs 373 grams. If that doesn't drive you nuts, throw on a
few grains and pennyweights. You need to know this kind of stuff if you ever want to calculate the extra weight
taken on by X - number of outlaws in a cowboy movie when they have just lifted Y - number of thousands of dollars
in payroll gold from a stagecoach, figuring the historic value of $20 per Troy ounce.