Irish measure

[11][12] Many 18th-century statutes of the Parliament of Ireland specified distances without specifying Irish or English measure, which led to confusion and disputes.

[17] Thomas Telford's Howth–Dublin Post Office extension of the London–Holyhead turnpike had its mileposts in English miles.

[27] The Church of Ireland Act 1851 allowed a chapel of ease to be built on certain types of plot of up to "One Acre Plantation Measure".

[42] The Irish Free State standardised its roads using English statute miles,[37] leading to some nationalist complaints.

[43] In 1965, two deputies proposed an amendment to the Road Transport Act to replace the English statute miles with Irish ones; it was rejected.

[46] Two-Mile Borris, County Tipperary is two Irish miles from Leighmore, site of a medieval monastery.

[48] Fivemiletown, County Tyrone is five Irish miles equidistant from Clogher, Brookeborough and Tempo.

[54][55] The Ordnance Survey of Ireland from its 1824 foundation used statute acres in its maps, which were used in turn for Griffith's Valuation and the census.

In older Gaelic usage, a townland was notionally 60 or 120 "acres", but the size varied by the quality of the land.

This unevenness was not sufficiently understood by English and Scottish planters, which caused disputes when confiscated land was divided and assigned.

[57] The Advertisements for Ireland of 1623 stated that the Irish acre varied by region from 1.25 to 8 English acres, while the Civil Survey of 1654 said that Irish surveys had measured only arable land, ignoring pasture, wood, bog, or wasteland.

[59] The civil parish of Carn, County Wexford has townlands named Threeacres, Nineacres, and Nineteenacres, with respective areas of 12, 21, and 30 statute acres.

[60] The Weights And Measures Commissioners' 1820 report included a list of regional terms in the United Kingdom and Channel Islands with their corresponding legal or customary values.