For weighing gold, silver and precious stones.

24 grains make.........................1 pennyweight.

20 pennyweights make..................1 ounce.

12 ounces make.........................1 pound.

The standard Troy pound is the weight of 22.79437 cubic inches of distilled water, and is less than the pound Avoirdupois.

The Troy pound is the one adopted by the mint at Philadelphia and elsewhere, and may be regarded as the standard of weight. The following tables show the formula of Troy weight, and the difference between Troy and Avoirdupois weights: The Troy pound contains 5670 grains equal to.....240 pwt. equal to 12 ounces =

1 lb. Troy.

480 grains equal to..... 20 pwt. equal to 1 ounce.

24 grains equal to..... 1 pwt.

The difference is shown as follows:

7000 Troy grains make......... 1 pound Avoirdupois.

4371/2 Troy grains make....... 1 ounce Avoirdupois.

175 Troy ounces make........192 ounces Avoirdupois.

175 Troy pounds make........144 pounds Avoirdupois.

1 Troy pound makes.......822857 pounds, Avoirdupois.

1 Avoirdupois pound makel.215278 pounds, Troy. One pound Troy is equal to 1 pint Wine Measure.