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The term furlong, or shot, was also used to describe a grouping of adjacent strips within an open field. [3] Among the early Anglo-Saxons, the rod was the fundamental unit of land measurement. A furlong was 40 rods; an acre 4 by 40 rods, or 4 rods by 1 furlong, and thus 160 square rods; there are 10 acres in a square furlong.
The chain (abbreviated ch) is a unit of length equal to 66 feet (22 yards), used in both the US customary and Imperial unit systems. It is subdivided into 100 links. [1] [2] There are 10 chains in a furlong, and 80 chains in one statute mile. [2]
Gunter's chain, introduced in the 17th century, is 66 feet (20.1 metres). Furlong: 201.168 m: Notionally the distance a plough team could furrow without rest, but actually a measure of 40 rods or 600 feet prior to the Composition of Yards and Perches; 40 rods or 660 feet since then. (See also the Ancient Greek stadion or 'stade'.) Mile: 1.61 km
Ten chains measure a furlong and 80 chains measure a statute mile. [1] Gunter's chain reconciled two seemingly incompatible systems: the traditional English land measurements, based on the number four, and decimals based on the number 10.
In some countries (eg. Canada, Great Britain, Ireland and the United States), the length of a race is usually expressed in miles and furlongs. These units have been converted to metres to allow for universal comparison. Common conversions: 5 furlongs = 1,006 m 1 mile and 1½ furlongs = 1,911 m 6 furlongs = 1,207 m 1 mile and 2 furlongs = 2,012 m
≡ furlong/fortnight ≈ 1.663 095 ... = 4.4704 × 10 −1 m/s 2: mile per minute per second: mpm/s ≡ 1 mi/(min⋅s) = 26.8224 m/s 2: mile per second squared: mps ...
furlong; mile; The best-attested of these is the perch, which varied in length from 10 to 25 feet, with the most common value (16 1 ⁄ 2 feet or 5.03 m) remaining in use until the twentieth century. [1] Later development of the English system continued in 1215 in the Magna Carta. [2] Standards were renewed in 1496, 1588 and 1758. [3]
The base unit in the International System of Units (SI) is the meter, defined as "the length of the path travelled by light in vacuum during a time interval of 1 ⁄ 299792458 seconds." [4] It is approximately equal to 1.0936 yd.