americká jednotka hmotnosti
BALE,BARREL, BLANK, BOX, BUSHEL,BUŠL, CENTAL, CLOVE, DOIT,DRACHM, DRAM, FIRKIN,GALLON, GRAIN, KEG, LAST,LIBRA, LONG, MITE, OUNCE,PERIOT, POUND, SLUG, STONE,TON, UNCE