For centuries it was the primary measure for all grains sold in the country.
They set it as 1,200 Scottish cubic inches or 19.98 litres, but effectively the exact volume continued to be defined by local custom and varied across the country.
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.
The second firlot, which contained 31 pints of water, about 50 litres, was for oats, barley and malt, which had been sold by heaped measure.
It finally disappeared with the introduction of Imperial units by the Weights and Measures Act 1824 (5 Geo.