a measure of capacity, being the fourth part of a barrel. The firkin of ale, which formerly was 8 gallons, by an act of 1803 was made 9 gallons, the same as the barrel of beer, or 915340 imperial gallons. The firkin of butter is equal to 56 lb.; that of soup, 64 lb.

FIROT, a dry measure used in Scotland, containing 4 pecks or ¼ of a butt. The Linlithgow wheat firiot (used also for rye, pease, beans, salt, and grass seeds) is to the imperial standard bushel as 0.998256 to 1. The barley firiot (also used for malt, oats, fruit, and potatoes) is to the imperial standard bushel as 1.4562794 to 1.