Scottish units

[citation needed] The system was based on the ell (length), stone (mass), and boll and firlot (volume).

4. c. 74) saw the end of any formal use in trade and commerce, although some informal use as customary units continued into the 20th century.

A unified weights and measures system is attributed to David I – though the first written records of this are from the 14th century.

These involved increases in the size of the firlot, the basic unit of grain measure, and occurred in: c.1500, 1555 (modified in 1563), 1587 and 1618.

This last date gave a fixed Scottish system which only changed with the introduction of English measures.

An increase in the size of the firlot allowed greater taxation to be raised (as each unit collected was bigger).