Sack (unit)

The sack (abbreviation: sck.) was an English unit of weight or mass used for coal[1] and wool.[2]

Wool

The wool sack or woolsack (Latin: saccus lanae or lane) was standardized as 2 wey of 14 stone each, with each stone 12½ merchants' pounds each (350 lbs. or about 153 kg), by the time of the Assize of Weights and Measures c. 1300. 12 such sacks formed the wool last.[3]

Coal

The coal sack was standardized as an imperial hundredweight of 112 avoirdupois pounds (now exactly 50.80234544 kg).[4]

References

  1. ↑ Cardarelli, F. (2003). Encyclopaedia of Scientific Units, Weights and Measures. Their SI Equivalences and Origins. London: Springer. p. 48. ISBN 978-1-4471-1122-1.
  2. ↑ Cardarelli, F. (2003). Encyclopaedia of Scientific Units, Weights and Measures. Their SI Equivalences and Origins. London: Springer. p. 49. ISBN 978-1-4471-1122-1.
  3. ↑ Ruffhead, Owen, ed. (1763a), The Statutes at Large, Vol. I: From Magna Charta to the End of the Reign of King Henry the Sixth. To which is prefixed, A Table of the Titles of all the Publick and Private Statutes during that Time, London: Mark Basket for the Crown, pp. 148–149. (in English) & (in Latin) & (in Norman)
  4. ↑ Since the 1959 International Yard and Pound Agreement, enacted in the United Kingdom in 1963.
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