A yard (abbreviation: yd) is a unit of length in several different systems, including English units, Imperial units, and United States customary units. It is equal to 3 feet or 36 inches, although its length in SI units varied slightly from system to system. The most commonly used yard today is the international yard, which is defined to be exactly 0.9144 metre.
Contents 1 Equivalence to other units of length 2 Historical origin 3 Current use 4 See also 5 References // Equivalence to other units of length1 international yard is equal to:
3 feet (1 foot is a third of a yard) 36 inches 0.9144 metre (1 metre is equal to about 1.0936 international yards)3The early yard was divided by the binary method into two, four, eight, and sixteen parts called the half-yard, span, finger, and nail. Two yards are a fathom.
Historical originThe yard derives its name from the word for a straight branch or rod,4 although the precise origin of the measure is not definitely known. Some believe it derived from the double cubit, or that it originated from cubic measure, others from its near equivalents, like the length of a stride or pace. One postulate was that the yard was derived from the girth of a person's waist, while another claim held that the measure was invented by Henry I of England as being the distance between the tip of his nose and the end of his thumb.5 It was first defined in law by Edward I of England in 1305,678 and again by Edward III of England in 1353.9
Following Royal Society investigations by John Playfair, Hyde Wollaston and John Warner in 1814 a committee of parliament proposed defining the standard yard based upon the length of a seconds pendulum. This was enacted in 1824.10 This is 39.1392 inches, and can be derived from the number of beats (86,400) between two meridians of the sun. The temperature compensated pendulum was to be held in a vacuum at sea level in Greenwich, London to give the length of the standard yard. However, a new physical Imperial Standard Yard was authorised by the Weights and Measures Act 1878,11 and was the legal standard in the United Kingdom until 1964. The "United Kingdom primary standard of the yard" (the old "Imperial Standard Yard") was measured as 0.914 396 9 metres in May 1963, one part in 300,000 shorter than the international yard that became the new legal standard, and was found to be shortening at a rate of about one part per million every 23 years.12
Current useThe yard is used as the standard unit of field-length measurement in American,13Canadian,14Association football,15 and Cricket.16
There are corresponding units of area and volume, the square yard and cubic yard respectively, and these are sometimes referred to simply as "yards" when no ambiguity is possible. For example, an American or Canadian concrete mixer marked with a capacity of "11 yards" or "1.5 yards", where cubic yards are obviously referred to.
Yards are also used in road signs on roads in the United Kingdom17 and the United States to specify short distances.
See also Anthropic units English unit Guz, the yard of the Middle East Imperial unit United States customary units Vara References ^ Bennett, Keith (2004), Bucher, Jay L., ed., The Metrology Handbook, Milwaukee, WI: American Society for Quality Measurement, p. 8, ISBN 978-0-87389-620-7 . ^ Walford, Edward (1878), Old and New London, VI, http://www.british-history.ac.uk/report.aspx?compid=45276 . ^ A. V. Astin & H. Arnold Karo, (1959), Refinement of values for the yard and the pound, Washington DC: National Bureau of Standards, republished on National Geodetic Survey web site and the Federal Register (Doc. 59-5442, Filed, June 30, 1959, 8:45 a.m.) ^ "yard2", A New Dictionary of English on Historical Principles, 10b, Oxford: University Press, 1928, pp. 16–17 . ^ Hone, William (1839), The Every-day Book and Table Book, London: R. Griffin & Co., p. 378, http://books.google.com/?id=IzoHAAAAQAAJ . ^ 33 Edw. I, c. 6. ^ Bigg, P. H.; Anderton, Pamela (1963), "The Yard Unit of Length", Nature 200: 730–32, doi:10.1038/200730a0 ^ Watson, C. M. (1910), British Weights and Measures, London: John Murray, pp. 36–39, http://www.archive.org/details/britishweightsme00watsuoft . ^ 27 Edw. III, c. 10. ^ 5 Geo 4 c.72: Levi, Leone (1866). "Standard Weights and Measures". Annals of British Legislation. 2 (2 ed.). London: Smith, Elder. pp. 420–421. OCLC 82207589. ^ Glazebrook, Richard (1922), "Measurement, Units of", Dictionary of Applied Physics, 1, pp. 580–88, http://www.archive.org/details/dictionaryofappl025484mbp . ^ Bigg, P. H.; Anderton, Pamela (1964), "The United Kingdom standards of the yard in terms of the metre", Br. J. Appl. Phys. 15: 291, doi:10.1088/0508-3443/15/3/308 . ^ American Football pitch dimensions ^ Canadian Football Pitch dimensions ^ Association Football pitch dimensions ^ Cricket pitch dimesions ^ Driving Standards Agency (1999), The Highway Code, London: The Stationery Office, ISBN 0 11 551977 7, pp. 74–75Find out when salvage yards were first set up. Read more about the journey of auto salvage yards from the 1920's till present day at yards.me.
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The Lehigh Valley Railroad's Packerton Yards was its hub for coal and freight transport for over a century, and one of the largest employers in Carbon County before closing in 1976. Though gone, it is fondly remembered by many former railroad employees and their families.
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Aramark is warning state regulators that it will lay off 613 employees next month if its contract to sell food and merchandise at Oriole Park at Camden Yards is not renewed.
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Our weekly look back at the state's top performances and newsmakers continues. Who are the JJHuddle Offensive, Defensive and Special Teams players of the week? Who threw for 540 yards? Who ran a win streak to 40? Who snapped a 19-game losing streak? We know...
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NEW LONDON – Remembering a 2009 game against Cardinal (Eldon) that started out eerily similar to Friday night’s game, the Winfield-Mt. Union football team instead thwarted a repeat and held onto a 29-14 win in their season opener.
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WELLMAN — Garrett Covington and Alex Coker both eclipsed the 100-yard rushing mark as the Washington freshman football team piled up 339 yards on the ground in a 34-6 win at Mid-Prairie last Friday night.
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Tim Rauber accounted for 108 of Dansville’s 312 rushing yards and Jason Boots-LoVetro scored two touchdowns in a 21-7 season-opening win over Cuba-Rushford Friday night.
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classification yard ( ′klasəfə′kāshən ′yärd ) ( civil engineering ) A railroad yard for separating trains according to car
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Charlie MacDowell passed for 249 yards and two touchdowns and added a 61-yard scoring run to lift Valley Central to the non-league win in Montgomery. MacDowell hit Steven Pizarro from 34 yards and Zach Adler from 78 yards.
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RB rushes for 123 yards, 2 TDs in debut MADISON, Wis. (AP) — John Clay says he’s got no shortage of motivation, and his first appearance this season looked a whole lot like last year’s dominating stretch.
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Eric Wellmon threw for 137 yards and a touchdown and rushed for 114 yards on 11 carries with a touchdown to lead host Wallkill to the non-league win on Friday night.
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Christine Michael rushed for 105 yards and Texas A&M's defense showed obvious improvement from last season in the Aggies' 48-7 season-opening victory Saturday night over lower-division Stephen F. Austin.
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