 Over the years the common definition seems to have increased.By an Act of Parliament of Scotland of 1617, the commissioners' firlot of Linlithgow was made the standard for the whole of Scotland, but, in fact, two units were defined for different commodities.The first, which “contained 21 pints and a mutchkin of the water of Leith,” (approximately 35 litres) was for wheat, pease, beans, rye, and white salt, commodities which had been sold by striken, or level measure.