Apothecaries' Weight.

20 Grains . . .

1 scruple, 20 grs. Troy.

3 Scruples. . .

1 drachm, 60 „ .

8 Drachms . .

1 ounce, 480 "

12 Ounces . • .

1 pound, 5760 "

Apothecaries and Chemists use this weight in compounding medicines, but they buy their drugs by Avoirdupoise weight. The pound and ounce are the same as in Troy weight, only differently divided and subdivided