King David I Defined the Inch

Scotland’s King David I defined one “ynche” is equal in width to the base of a man’s thumbnail, figured by taking the average of the thumbnail breadths of a small, a middle-sized, and a large man. The word “inch” is derived from Latin uncia, a twelfth, or the twelfth part of one Roman foot.

      King David I

Additional Information:

  • Inch: unit of measurement
    (The Latin word uncia was the source of the name of another English unit, the ounce.) The old English ynce was defined by King David I of Scotland about 1150 as …
  • David I of Scotland – Wikipedia
    David I or Dauíd mac Maíl Choluim was a 12th-century ruler who was Prince of the Cumbrians from 1113 to 1124 and later King of Scotland from 1124 to 1153. … In the later part of 1113, King Henry gave David the hand of Matilda of … In 1150, it looked like Caithness and the whole earldom of Orkney were going to come …
  • Scottish units – Wikipedia
    Scottish or Scots units of measurement are the weights and measures peculiar to Scotland … The system is said to have been introduced by David I of Scotland (1124–53), … A fraudulent smaller inch of ​1⁄42 of an ell is also recorded. … Weight equivalents of one boll are given in a trade dictionary of 1863 as follows: Flour …
  • Around 1150, King David I of Scotland defined the inch – Chegg
    Answer to Around 1150, King David I of Scotland defined the inch as the width of a man’s thumb at the base of the nail. Discuss….
  • Inch – Enacademic
    Consequently, the international inch is defined as exactly 25.4 millimetres. … Given the etymology of the word “inch”, it would seem that the inch is a unit … the old English ynche was defined (by King David I of Scotland in about 1150) as the … the unit being used circa AD 1000 (both Laws of Æthelberht and Laws of Ælfred).

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