Chain (unit) in the context of "Knotted cord"

The acre (/ˈeɪkər/ AY-kər) is a unit of land area used in the British imperial and the United States customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, 1⁄640 of a square mile, 4,840 square yards, or 43,560 square feet, and approximately 4,047 m, or about 40% of a hectare. The acre is sometimes abbreviated ac, but is usually spelled out as the word "acre".

Traditionally, in the Middle Ages, an acre was conceived of as the area of land that could be ploughed by one man using a team of eight oxen in one day. The acre is still a statutory measure in the United States, where both the international acre and the US survey acre are in use, but they differ by only four parts per million. The most common use of the acre is to measure tracts of land. The acre is used in many existing and former Commonwealth of Nations countries by custom. In a few, it continues as a statute measure, although not since 2010 in the UK, and not for decades in Australia, New Zealand, and South Africa. In many places where the acre is no longer a statute measure, it is still lawful to use as supplementary information next to the statutory hectare measurement.

A cricket pitch is the rectangular central strip of a cricket field between the two wickets, where most of the action takes place. It is 22 yd (20.12 m) long (1 chain) and 10 ft (3.05 m) wide. The surface is flat and is normally covered with extremely short grass, but can be completely dry or dusty soil with barely any grass or, in some circumstances (that are rarely seen in high level cricket), made from an artificial material. Over the course of a cricket match, the pitch is not repaired or altered other than in special circumstances - meaning that it will change condition. Any grass on the pitch at the start of the game, for example, may disappear due to wear.

As almost all deliveries bowled will bounce off the pitch towards the batter, the state and type of a cricket pitch can significantly affect the outcome of a match. For example, a dusty and very dry pitch often favours spin bowling because the ball grips more on such surfaces, giving the team with stronger spin bowlers a potential advantage. The state of the pitch is so important that home teams can be fined or docked points if it is deemed unfit for normal play or dangerous for batters, with balls behaving unpredictably. Players may also face disciplinary action if found deliberately damaging or altering the pitch in violation of the Laws of Cricket. Because of these factors, coaches, players, and commentators often discuss how the pitch is "behaving" during a match—especially in first-class cricket or Test cricket, where conditions can change over several days. These changes also influence the coin toss decision, as captains weigh whether batting first or bowling first is more advantageous. For example, a captain might choose to bat first on a flat pitch but opt to bowl on a greener, more moist surface that offers early movement.

Clapham Junction (/ˈklæpəm ˈdʒʌŋkʃən/) is a major railway station near St John's Hill in south-west Battersea, in the London Borough of Wandsworth, England. It lies 2 miles 57 chains (2.71 mi; 4.37 km) from London Victoria and 3 miles 74 chains (3.93 mi; 6.32 km) from London Waterloo. Despite its name, Clapham Junction is not in Clapham, a district 1 mile (1.6 km) to the south-east.

A major transport hub, Clapham Junction station is on both the South West Main Line and Brighton Main Line, as well as numerous other routes and branch lines which pass through or diverge from the main lines at this station. It serves as a southern terminus of both the Mildmay and Windrush lines of the London Overground.

The Cambridge line is a railway line in the East of England; it connects the East Coast Main Line at Hitchin to the West Anglia Main Line at Cambridge. The line is owned by Network Rail and is 23 miles 15 chains (23.19 miles, 37.32 km) in length, serving nine stations. Train services are operated by Thameslink and Great Northern.

Originally opened in 1851, the Royston and Hitchin Railway built a route between Hitchin and Shepreth. There, it met the Shepreth Branch Railway, and the two were joined in 1862 to form the modern route. A station at Letchworth was added in 1905 in conjunction with its opening as the world's first garden city. However, the line fell into decline throughout the mid 1900s, and Harston station was closed as part of the Beeching Axe in 1963.

Inverness railway station serves the Scottish city of Inverness. It is the terminus of the Highland Main Line, the Aberdeen–Inverness line (of which the Inverness and Nairn Railway is now a part), the Kyle of Lochalsh line and the Far North Line.

The Aberdeen and Perth lines diverge at Millburn Junction a short distance beyond Welsh's Bridge. Platforms 1–4 are 118 miles 3 chains (190 km) from Perth (measured via Carrbridge); Millburn Junction, 117 miles 37 chains (189.0 km) from Perth (or 143 miles 39 chains (230.9 km) via Dava). The station is the zero point for the Far North Line and platforms 5–7 are 2 chains (40 m) along this line; Rose Street Junction, 18 chains (360 m) along the line, is 118 miles 1 chain (189.9 km) from Perth.

Aberdeen railway station is the main railway station in Aberdeen, Scotland. It is the busiest railway station in Scotland north of the major cities of Edinburgh and Glasgow. It is located on Guild Street in the city centre, next to Union Square.

The station is managed by ScotRail. Inter-city, regional, local and sleeper train services are provided to all parts of Great Britain by ScotRail, Caledonian Sleeper, CrossCountry and London North Eastern Railway. The station is the northern terminus of the Dundee–Aberdeen line and the southern terminus of the Aberdeen–Inverness line, and is measured 241 miles 6 chains (388.0 km) from Carlisle via Perth.

A furlong is a measure of distance in imperial units and United States customary units equal to one-eighth of a mile, equivalent to any of 660 feet, 220 yards, 40 rods or perches, 10 chains, or approximately 201 metres. It is now mostly confined to use in horse racing, where in many countries it is the standard measurement of race lengths, and agriculture, where it is used to measure rural field lengths and distances.

In the United States, some states use older definitions for surveying purposes, leading to variations in the length of the furlong of two parts per million, or about 0.4 millimetres (1⁄64 inch). This variation is small enough to not have practical consequences in most applications.

Halifax Street is a street in the south-eastern sector of the centre of Adelaide, South Australia. It runs east–west between East Terrace and King William Street, crossing Hutt Street and Pulteney Street and passing through Hurtle Square. It was named after Sir Charles Wood (later Charles Wood, 1st Viscount Halifax), British Member of Parliament for Halifax.

Halifax Street is one of the intermediate-width streets of the Adelaide grid, at 1+1⁄2 chains (99 ft; 30 m) wide.