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Furlong




A furlong is a measure of Distance within Imperial Units and U.S. Customary Units . Although its definition has varied historically, in modern terms it equals 660 Feet or 220 Yard s, and is therefore equal to 201.168 Metre s. There are ten Chains in a furlong and eight furlongs in a Mile . The name "furlong" derives from the Old English words ''furh'' (furrow) and ''lang'' (long). It originally referred to the length of the furrow in one Acre of a ploughed Open Field (a medieval communal field which was divided into strips). The system of long furrows arose because turning a team of oxen pulling a heavy plough was difficult. This offset the drainage advantages of short furrows and meant furrows were made as long as possible. For this reason, it was once also called an '''acre's length'''.

Distances for , which also abolished from official use many other traditional units of measurement.

Coincidentally, 5 furlongs is 1005.84 metres (exactly) and is therefore approximately 1 kilometre.


TRIVIA

An absurd unit of speed often misquoted is the Furlong Per Fortnight , which Converts to:

  • a car travelling at 60 km/h (37 mph) is travelling at a speed of 100,214.7 furlongs per fortnight;

  • a Boeing 737 cruising at 420 Knots or 216.2 m/s (i.e. typical 0.8 Mach cruise) is travelling at 1,300,013.7 furlongs per fortnight;

  • the Speed Of Light in vacuum is approximately 1.803 furlongs per fortnight;

  • one furlong per fortnight is 0.166 millimetres per second, which would be barely noticeable to the naked eye (the tip of an hour hand on a clock, measuring 3.75 feet in length, travels at about 1 furlong per fortnight).


The city of Chicago 's address numbering system allots a measure of 800 numbers to each mile. Logically, streets were subsequently laid out 8 to the mile. This means that every block in a typical Chicago neighborhood (in either North/South or East/West direction but rarely both) is precisely one furlong.

In the covering the entire island of Manhattan