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Yard
Two yardsticks, used for measuring "yard goods"
General information
Unit systemimperial/USunits
Unit ofLength
Symbolyd
Conversions
1 ydin...... is equal to...
Imperial/US units3ft
   36in
Metric(SI) units0.9144m
The informal publicimperialmeasurement standardserected at theRoyal Observatory,Greenwich,London,in the 19th century: 1Britishyard, 2feet,1foot,6inches,and 3inches.The inexact monument was designed to permit rods of the correct measure to fit snugly into its pins at an ambient temperature of 62°F(16.66°C).[1][2]
Bronze Yard No.11, the official standard of length for theUnited Statesbetween 1855 and 1892, when theTreasury Departmentformally adopted a metric standard. Bronze Yard No.11 was forged to be an exact copy of the British Imperial Standard Yard held byParliament.Both are line standards: the yard was defined by the distance at 62°Fbetween two fine lines drawn ongoldplugs(closeup, top)installed in recesses near each end of the bar.

Theyard(symbol:yd)[3][4]is anEnglish unitoflengthin both the Britishimperialand UScustomarysystems of measurementequalling 3feetor 36inches.Since 1959 it has been byinternational agreementstandardized as exactly 0.9144meter.A distance of 1,760 yards is equal to 1mile.

TheUS survey yardis very slightly longer.

Name

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See also:yardland,ell,androd.

The term,yardderives from theOld Englishgerd,gyrdetc., which was used forbranches,staves andmeasuring rods.[5]It is first attested in the late 7th centurylawsofIne of Wessex,[6]where the "yard of land" mentioned[6]is theyardland,an old English unit oftax assessmentequal to1⁄4hide.[n 1]Around the same time theLindisfarne Gospelsaccount of themessengers from John the Baptistin theGospel of Matthew[7]used it for a branch swayed by the wind.[5]In addition to the yardland, Old andMiddle Englishboth used their forms of "yard" to denote thesurveyinglengths of 15 feet (4.6 m) or 16.5 feet (5.0 m), used in computingacres,a distance now usually known as the "rod".[5]

A unit of three English feet is attested ina statute ofc. 1300(see below), but there it is called anell(ulna,lit."arm"), a separate and usually longer unit of around 45 inches (1,100 mm). The use of the word ‘yard’ (Middle English:ȝerdorȝerde) to describe this length is first attested inWilliam Langland's poem onPiers Plowman.[5][n 2]The usage seems to derive from theprototypestandardrods held by the king and his magistrates (see below).

The word ‘yard’ is ahomonymof ‘yard’ in the sense ofan enclosed area of land.This second meaning of ‘yard’ has anetymologyrelated to the word ‘garden’ and is not related to the unit of measurement.[10][11]

History

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Origin

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The origin of the yard measure is uncertain. Both theRomansand theWelshused multiples of a shorterfoot,but2+1⁄2Roman feetwas a "step"(Latin:gradus) and 3Welsh feetwas a "pace"(Welsh:cam). TheProto-Germaniccubitor arm's-length has beenreconstructedas *alinô,which developed into theOld Englisheln,Middle Englishelne,and modernellof 1.25 yd (1.14 m). This has led some to derive the yard of threeEnglish feetfrom pacing; others from the ell or cubit; and still others fromHenry I's arm standard (see below). Based on theetymology of the other "yard",some suggest it originally derived from the girth of a person's waist, while others believe it originated as acubic measure.[citation needed]One official British report writes:

The standard of measure has always been taken either from some part of the human body, such as a foot, the length of the arm, the span of the hand, or from other natural objects, such as a barleycorn, or other kind of grain. But the yard was the original standard adopted by the early English sovereigns, and has been supposed to be founded upon the breadth of the chest of the Saxon race. The yard continued till the reign of Henry VII., when the ell was introduced, that being a yard and a quarter, or 45 inches. The ell was borrowed from the Paris drapers. Subsequently, however, Queen Elizabeth re-introduced the yard as the English standard of measure.[12]

From ell to yard

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The earliest record of a prototype measure is the statuteII Edgar Cap. 8(AD 959x963), which survives in several variant manuscripts. In it,Edgar the Peacefuldirected theWitenagemotatAndoverthat "the measure held atWinchester"should be observed throughout his realm.[13](Some manuscripts read "atLondonand at Winchester ".)[14][15]The statutes ofWilliam Isimilarly refer to and uphold the standard measures of his predecessors without naming them.

William of Malmesbury'sDeeds of the Kings of Englandrecords that during the reign ofHenry I(1100 - 1135), "the measure of his arm was applied to correct the falseellof the traders and enjoined on all throughout England. "[16]Thefolktalethat the length was bounded by the king's nose[17]was added some centuries later.Charles Moore Watsondismisses William's account as "childish",[18]but William was among the most conscientious and trustworthy medieval historians.[19]TheFrench"king's foot"was supposed to have derived fromCharlemagne,[19]and the English kings subsequently repeatedly intervened to impose shorter units with the aim of increasing tax revenue.[citation needed]

The earliest surviving definition of this shorter unit appears in theAct on the Composition of Yards and Perches,one of thestatutes of uncertain date[n 3]tentatively dated to the reign ofEdward IorIIc. 1300.Its wording varies in surviving accounts. One reads:[21]

It is ordained that 3grains of barleydry and round do make aninch,12 inches make 1foot,3 feet make 1 yard, 5 yards and a half make aperch,and 40 perches in length and 4 in breadth make anacre.

TheLiber Horncompilation (1311) includes that statute with slightly different wording and adds:[22]

And be it remembered that theironyard of our Lord the King containeth 3feetand no more, and a foot ought to contain 12inchesby the right measure of this yard measured, to wit, the 36th part of this yard rightly measured maketh 1 inch neither more nor less and 5 yards and a half make aperchthat is 16 feet and a half measured by the aforesaid yard of our Lord the King.

In some early books, this act was appended to another statute of uncertain date titled theStatute for the Measuring of Land.The act was not repealed until theWeights and Measures Act 1824.[24]

Yard and inch

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In a law of 1439 (18 Hen. 6.c. 16) the sale of cloth by the "yard and handful" was abolished, and the "yard and inch" instituted[25](seeell).

There shall be but one Measure of Cloth through the Realm by theYard and the Inch,and not by theYard and Handful,according to the London Measure.

According to Connor,[26]cloth merchants had previously sold cloth by the yard and handful to evade high taxes on cloth (the extra handful being essentially a black-market transaction). Enforcement efforts resulted in cloth merchants switching over to the yard and inch, at which point the government gave up and made the yard and inch official. In 1552, the yard and inch for cloth measurement was again sanctioned in law (5 & 6 Edw. 6.c. 6.An Act for the true making of Woolen Cloth.)[27]

XIV. And that all and everyBroad Clothand Clothes calledTaunton Clothes,Bridgwaters,and other Clothes which shall be made after the said Feast in Taunton, Bridgwater or in other Places of like Sort, shall contain at the Water in Length betwixt twelve and thirteen Yards,Yard and Inchof the Rule, and in Breadth seven Quarters of a Yard: (2) And everynarrow Clothmade after the said Feast in the said Towns or elsewhere of like Sorts, shall contain in the Water in Length betwixt three and twenty and five and twenty Yards,Yard and Inchas is aforesaid, and in Breadth one Yard of like Measure; (3) and every such Cloth, both Broad and Narrow being wellscowred,thicked,milledand fully dried, shall weigh xxxiv. li. the Piece at the least.

XV. And that all Clothes named Check-KersieandStraits,which shall be made after the said Feast shall contain being wet between seventeen and eighteenYards, with the Inchesas is aforesaid, and in Breadth one Yard at the least at the Water; and being well scowred, thicked, milled and fully dried, shall weigh xxiv. li. the Piece at the least.

The yard and inch for cloth measurement was also sanctioned again in legislation of 1557–1558 (4 & 5 Ph. & M.c. 5.An act touching the making of woolen clothes.par. IX.)[28]

IX. Item, That every ordinarykersiementioned in the said act shall contain in length in the water betwixt xvi. and xvii. yards,yard and inch;and being well scoured thicked, milled, dressed and fully dried, shall weigh nineteen pounds the piece at the least:...

As recently as 1593, the same principle is found mentioned once again (35 Eliz. 1.c. 10An act for the reformation of sundry abuses in clothes, called Devonshire kerjies [sic] or dozens, according to a proclamation of the thirty-fourth year of the reign of our sovereign lady the Queen that now is.par. III.)[29]

(2) and each and every of the same Devonshire kersies or dozens, so being raw, and as it cometh forth off the weaver's loom (without racking, stretching, straining or other device to encrease the length thereof) shall contain in length between fifteen and sixteen yards by the measure ofyard and inchby the rule,...

Physical standards

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One of the oldest yard-rods in existence is the clothyard of theWorshipful Company of Merchant Taylors.It consists of a hexagonal iron rod5⁄8in (16 mm) in diameter and1⁄100in (0.25 mm) short of a yard, encased within a silver rod bearing the hallmark 1445.[26][30]In the early 15th century, the Merchant Taylors Company was authorized to "make search" at the opening of the annualSt. Bartholomew's Day Cloth Fair.[31][32]In the mid-18th century, Graham[who?]compared the standard yard of the Royal Society to other existing standards. These were a "long-disused" standard made in 1490 during the reign ofHenry VII,[33]and a brass yard and a brassellfrom 1588 in the time ofQueen Elizabethand still in use at the time, held at theExchequer;[34]a brass yard and a brass ell at theGuildhall;and a brass yard presented to theClock-Makers' Companyby the Exchequer in 1671.[35]The Exchequer yard was taken as "true"; the variation was found to be +1⁄20to −1⁄15of an inch, and an additional graduation for the Exchequer yard was made on the Royal Society's standard.[35]In 1758 the legislature required the construction of a standard yard, which was made from the Royal Society's standard and was deposited with the clerk of theHouse of Commons;it was divided into feet, one of the feet into inches, and one of the inches into tenths.[35]A copy of it, but with upright cheeks between which other measuring rods could be placed, was made for the Exchequer for commercial use.[35][36]

19th-century Britain

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FollowingRoyal Societyinvestigations byJohn Playfair,Hyde Wollastonand John Warner in 1814 a committee of parliament proposed defining the standard yard based upon the length of aseconds pendulum.This idea was examined but not approved.[37]TheWeights and Measures Act 1824(5 Geo. 4.c. 74)An Act for ascertaining and establishing Uniformity of Weights and Measuresstipulates that:[38]

From and after the First Day ofMayOne thousand eight hundred and twenty five the Straight Line or Distance between the Centres of the Two Points in the Gold Studs of the Straight Brass Rod now in the Custody of the Clerk of the House of Commons whereon the Words and Figures "Standard Yard 1760" are engraved shall be and the same is hereby declared to be the original and genuine Standard of that Measure of Length or lineal Extension called a Yard; and that the same Straight Line or Distance between the Centres of the said Two Points in the said Gold Studs in the said Brass Rod the Brass being at the Temperature of Sixty two Degrees byFahrenheit's Thermometer shall be and is hereby denominated the Imperial Standard Yard and shall be and is hereby declared to be the Unit or only Standard Measure of Extension, wherefrom or whereby all other Measures of Extension whatsoever, whether the same be lineal, superficial or solid, shall be derived, computed and ascertained; and that all Measures of Length shall be taken in Parts or Multiples, or certain Proportions of the said Standard Yard; and that One third Part of the said Standard Yard shall be a Foot, and the Twelfth Part of such Foot shall be an Inch; and that the Pole or Perch in Length shall contain Five such Yards and a Half, the Furlong Two hundred and twenty such Yards, and the Mile One thousand seven hundred and sixty such Yards.

In 1834, the primary Imperial yard standard was partially destroyed in a fire known as theBurning of Parliament.[39][n 4].In 1838, a commission[n 5]was formed to reconstruct the lost standards, including the troy pound, which had also been destroyed.[43]In 1845, a new yard standard was constructed based on two previously existing standards known as A1 and A2, both of which had been made for the Ordnance Survey, and R.S. 46, the yard of theRoyal Astronomical Society.All three had been compared to the Imperial standard before the fire.

The new standard was made of Baily's metal No. 4 consisting of 16 parts copper,2+1⁄2parts tin, and 1 part zinc. It was 38 inches long and 1 inch square. TheWeights and Measures Act 1855granted official recognition to the new standards. Between 1845 and 1855 forty yard standards were constructed, one of which was selected as the new Imperial standard. Four others, known as 'parliamentary copies', were distributed to the Royal Mint, the Royal Society of London, the Royal Observatory at Greenwich, and the New Palace at Westminster, commonly called the Houses of Parliament.[44]The other 35 yard standards were distributed to the cities of London, Edinburgh, and Dublin, as well as the United States and other countries (although only the first five had official status).[45]The imperial standard received by the United States is known as "Bronze Yard No. 11"[46]

TheWeights and Measures Act 1878(41 & 42 Vict.c. 49) confirmed the status of the existing yard standard, mandated regular intercomparisons between the several yard standards, and authorized the construction of one additional Parliamentary Copy (made in 1879 and known as Parliamentary Copy VI).[47]

Definition of the yard in terms of the meter

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Subsequent measurements revealed that the yard standard and its copies were shrinking at the rate of one part per million every twenty years due to the gradual release of strain incurred during the fabrication process.[48][49] Theinternational prototype meter,on the other hand, was comparatively stable. A measurement made in 1895 determined the length of the meter at39.370113inches relative to the imperial standard yard. TheWeights and Measures (Metric System) Act 1897[50](60 & 61 Vict.c. 46) in conjunction with Order in Council 411 (1898) made this relationship official. After 1898, the de facto legal definition of the yard came to be accepted as36⁄39.370113of a meter.

The yard (known as the "international yard" in the United States) was legally defined to be exactly 0.9144meterin 1959 under an agreement in 1959 between Australia, Canada, New Zealand, South Africa, the United Kingdom and the United States.[51]In the UK, the provisions of the treaty were ratified by theWeights and Measures Act 1963.The Imperial Standard Yard of 1855 was renamed the United Kingdom Primary Standard Yard and retained its official status as the national prototype yard.[52][53]

Current use

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InUK road signs,shorter distances (such as picnic area 150 yards ahead) are given in yards, with longer distances given inmiles

The yard is used as the standard unit of field-length measurement inAmerican,[54]Canadian[55]andassociation football,[56]cricket pitchdimensions,[57]and in some countries,golffairway measurements.

There are corresponding units ofareaandvolume,thesquare yardandcubic yardrespectively. These are sometimes referred to simply as "yards" when no ambiguity is possible, for example an American or Canadianconcrete mixermay be marked with a capacity of "9 yards"or" 1.5 yards ", where cubic yards are obviously referred to.

Yards are also used and are the legal requirement onroad signsfor shorter distances in the United Kingdom, and are also frequently found in conversation between Britons much like in the United States for distance.[58]

Textiles and fat quarters

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The yard, subdivided into eighths, is used for the purchase of fabrics in the United States and United Kingdom[n 6][citation needed]and was previously used elsewhere. In the United States the term "fat quarter" is used for a piece of fabric which is half a yard in length cut from a roll and then cut again along the width so that it is only half the width of the roll, thus the same area as a piece of one quarter yard cut from the full width of the roll; these pieces are popular forpatchwork and quilting.[59]The term "fat eighth" is also used, for a piece of one quarter yard from half the roll width, the same area as one eighth cut from the roll.[60]

Equivalences

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For purposes of measuring cloth, the early yard was divided by the binary method into two, four, eight and sixteen parts.[61]The two most common divisions were the fourth and sixteenth parts. The quarter of a yard (9 inches) was known as the "quarter" without further qualification, while the sixteenth of a yard (2.25 inches) was called anail.[62]The eighth of a yard (4.5 inches) was sometimes called afinger,[63]but was more commonly referred to simply as an eighth of a yard, while the half-yard (18 inches) was called "half a yard".[64]

Other units related to the yard, but not specific to cloth measurement: two yards are afathom,a quarter of a yard (when not referring to cloth) is aspan.[65]

Conversions

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  • international yard(defined 1959):[66][67]
1250 (international) yards = 1143 meters
1 (international) yard = 0.9144 meters (exact)[68]
1 (international)statute mile= 8 internationalfurlongs= 80 internationalchains= 1760 (international) yards
  • pre-1959 US yard– defined 1869, implemented 1893,[69]deprecated 2023[70]
For survey purposes, certain pre-1959 units were retained, usually prefaced by the word "survey," among them the survey inch,survey foot,and survey mile, also known as thestatute mile.Therodandfurlongexisted only in their pre-1959 form and are thus not prefaced by the word "survey", and were deprecated at the same time as the survey foot. New conversion factors for the rod and furlong as 16.5 international feet and 660 international feet respectively have been published by NIST.[71]However, it is not clear if a "survey yard" actually exists.[72]If it did, its hypothetical values would be as follows:
3937 survey yards = 3600 meters[69]
1 survey yard ≈0.91440183meters[69]
1survey mile= 8furlongs= 80chains= 1760 survey yards
  • Comparing international yards and survey yards
500,000(international) yards =499,999survey yards =457,200meters
1 (international) yard =0.999998survey yards (exact)[69]
1 (international) mile =0.999998survey miles(exact)

See also

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Notes

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  1. ^The later Latin glossvirgata terredescribes it as "branched".
  2. ^Middle English:Thanne drowe I me amonges draperes · my donet to lerne / To drawe þe lyser alonge [·] þe lenger it semed / Amonge þe riche rayes · I rendred a lessoun / To broche hem with a bat-nedle · and plaited hem togyderes / And put hem in a presse · and pyned hem þerinne / Tyl ten ȝerdes or twelue · tolled out threttene[8]
    Translation: "Then tarried I amongst drapers · my grammar to learn; /To draw theselvedgealong · the longer it seemed; /Among the rich ranged cloths · rendered a lesson, / To pierce them with a pack-needle · and plait them together, / Put them in a press · and pin them therein / Till ten yards or twelve · had tolled out to thirteen.[9]
  3. ^Although not originally statutes, thestatutes of an uncertain datewere eventually accepted as such with the passage of time.
  4. ^The following references are useful for identifying the authors of the preceding reference: Ref.,[40]Ref.,[41]and Ref.[42]
  5. ^Whose report was referenced in Ref.[39]
  6. ^In the United Kingdom fabric may be sold by the yard if the equivalent metric measure is also given. Major shops sell by the meter.

References

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Citations

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  1. ^Bennett (2004),p. 8.
  2. ^Ewart (1862),pp. 112–113.
  3. ^"Recommended Unit Symbols, SI Prefixes, and Abbreviations"(PDF).Institute of Electrical and Electronics Engineers (IEEE).RetrievedApril 7,2021.
  4. ^BS350:Part 1:1974 Conversion factors and tables Part 1. Basis of tables. Conversion factors.British Standards Institution. 1974. pp. 5, 100.
  5. ^abcdOED (1921),"yard, n.2".
  6. ^abThorpe (1840),p. 63.
  7. ^Matthew 11:7
  8. ^Langland (1377),Ch. 5:ll, lines 211–216.
  9. ^Attwater (1957),p. 38.
  10. ^OED (1921),"yard, n.1".
  11. ^OED (1921),"gird, v.1".
  12. ^Report from the Select Committee on Weights and Measures; together with the Proceedings of the Committee, Minutes of Evidence, Appendix and Index.London. August 4, 1862.{{cite book}}:CS1 maint: location missing publisher (link)
  13. ^Thorpe (1840).
  14. ^Thorpe (1840),p. 113.
  15. ^Liebermann (1903),p. 204–206.
  16. ^Giles 1866,p. 445.
  17. ^Green (1986),p. 106.
  18. ^Watson (1910),pp. 36–39.
  19. ^abConnor (1987),p. xxiv.
  20. ^Ruffhead (1765),p. 421.
  21. ^BLCottonMSClaudius D2, cited and translated inRuffhead.[20]
  22. ^Fowler (1884),p. 276.
  23. ^Statutes (1824),p. 349.
  24. ^5 Geo. 4. c. 74, §24.[23]
  25. ^Statutes at Large.1763. p. 594.
  26. ^abConnor (1987).
  27. ^Owen Ruffhead, ed. (1763).The statutes at large.Vol. 2. p. 442.
  28. ^Great Britain;Pickering, Danby(1763). Danby Pickering (ed.).The statutes at large.Vol. 6. Printed by J. Bentham. p. 96.
  29. ^Great Britain;Pickering, Danby(1763).The statutes at large.Vol. 6. Printed by J. Bentham. p. 444.
  30. ^Robinson, Sir John Charles;Victoria and Albert museum(1863).Catalogue of the special exhibition of works of art of the mediæval, Renaissance, and more recent periods, on loan at the South Kensington museum, June 1862.Printed by George E. Eyre and William Spottiswoode, printers to the Queen's most excellent Majesty. For Her Majesty's Stationery Office. p. 452.
  31. ^William Carew Hazlitt(1892).The livery companies of the city of London: their origin, character, development, and social and political importance.S. Sonnenschein & co. p.280.
  32. ^Clode, Charles Mathew (1888).The early history of the Guild of merchant taylors of the fraternity of St. John the Baptist, London: with notices of the lives of some of its eminent members.Harrison. p.128.
  33. ^Warden of the Standards (1873).Seventh annual report of the Warden of the Standards, on the proceedings and business of the standard weights and measures department of the Board of Trade, for 1872–73, Appendix III.Vol. 38. House of Commons. p. 34.(pp 374 of book)
  34. ^Warden of the Standards (1873).Seventh annual report of the Warden of the Standards, on the proceedings and business of the standard weights and measures department of the Board of Trade, for 1872–73, Appendix III.Vol. 38. House of Commons. p. 25,26.(pp 364,365 of book)
  35. ^abcdKnight, Charles (1840).The Penny magazine of the Society for the Diffusion of Useful Knowledge, Volume 9.London: Society for the Diffusion of Useful Knowledge. pp. 221–2.In 1758 the legislature turned attention to this subject; and after some investigations on the comparative lengths of the various standards, ordered a rod to be made of brass, about 38 or 39 inches long, and graduated from the Royal Society's yard: this was marked "Standard Yard, 1758," and was laid by in the care of the clerk of the House of Commons. For commercial purposes another bar was made, with the yard marked off from the same standard; but it had two upright fixed cheeks, placed exactly a yard asunder, between which any commercial yard measures might be placed, in order to have their accuracy tested: it was graduated into feet, one of the feet into inches, and one of the inches into ten parts. This standard was to be kept at the Exchequer. In 1760, a copy of Bird's standard, made two years before, was constructed.
  36. ^Herbert Treadwell Wade (1905).The New international encyclopaedia.Dodd, Mead and company. p. 405.
  37. ^Charles Hutton Dowling (1872).A series of metric tables: in which the British standard measures and weights are compared with those of the metric system at present in use on the continent.Lockwood. pp. xii–iii.
  38. ^Great Britain (1824).The statutes of the United Kingdom of Great Britain and Ireland (1807–1865).His Majesty's statute and law printers. pp.339–354.
  39. ^abAiry, G. B.;Baily, F.;Bethune, J. E. D.;Herschel, J. F. W.;Lefevre, J. G. S.;Lubbock, J. W.;G. Peacock;Sheepshanks, R.(1841).Report of the Commissioners appointed to consider the steps to be taken for restoration of the standards of weight & measure(Report). London: W. Clowes and Sons for Her Majesty's Stationery Office.RetrievedApril 20,2020.We shall in the first place describe the state of the Standards recovered from the ruins of the House of Commons, as ascertained in our inspection of them made on 1st June, 1838, at the Journal Office… No. 1. A brass bar marked "Standard [G. II. crown emblem] Yard, 1758," which on examination was found to have its right hand stud perfect, with the point and line visible, but with its left hand stud completely melted out, a hole only remaining. The bar was somewhat bent, and discoloured in every part. No. 2. A brass bar with a projecting cock at each end, forming a bed for the trial of yard-measures; discoloured. No. 3. A brass bar marked "Standard [G. II. crown emblem] Yard, 1760," from which the left hand stud was completely melted out, and which in other respects was in the same condition as No. 1. No. 4. A yard-bed similar to No. 2; discoloured.… It appears from this list that the bar adopted in the Act 5th Geo. IV., cap. 74, sect. 1, for the legal standard of one yard, (No. 3 of the preceding list), is so far injured, that it is impossible to ascertain from it, with the most moderate accuracy, the statutable length of one yard.… We have therefore to report that it is absolutely necessary that steps be taken for the formation and legalizing of new Standards of Length and Weight.
  40. ^J. F. W. Herschel(1845).Memoir of Francis Baily, Esq(Report). London: Moyes and Barclay. pp. 23–24.RetrievedApril 20,2020.
  41. ^Royal commission on scientific instruction and the advancement of science: Minutes of evidence, appendices, and analyses of evidence, Vol. II(Report). London: George Edward Eyre and William Spottiswoode Printers of the queen's most excellent majesty for Her Majesty's Stationery officer. 1874. p. 184.RetrievedApril 20,2020.
  42. ^"Art. VIII.—Report of the Commissioners appointed to consider the steps to be taken for restoration of the standards of weight and measure.Presented to both Houses of Parliament by Command of her Majesty, 1841. ",The Edinburgh Review,vol. 77, no. February 1843… April 1843, Edinburgh: Ballantyne and Hughes, p. 228, 1843
  43. ^Connor 1987,p. 261.
  44. ^Zupko, Ronald Edward(1990).Revolution in measurement: Western European weights and measures since the age of science.American Philosophical Society. p.183.ISBN978-0-87169-186-6.
  45. ^Connor 1987,p. 264–266.
  46. ^"NIST museum collection".Archived fromthe originalon March 3, 2016.RetrievedJanuary 22,2012.
  47. ^Great Britain (1878).Statutes at large.pp.308–341.
  48. ^"History of Calibration".Norwich Instrument Services. 2012.
  49. ^"The Gauge Block Handbook"(PDF).The National Institute of Standards and Technology (NIST). 2013.
  50. ^Mews, John, ed. (1897)."Statutes of the Realm – 60–61 Victoria".The Law journal reports.Vol. 66. London: The Law Journal Reports. p. 109.
  51. ^A. V. Astin & H. Arnold Karo, (1959),Refinement of values for the yard and the pound,Washington DC:National Bureau of Standards,republished onNational Geodetic Surveyweb site and theFederal Register(Doc. 59-5442, Filed, June 30, 1959, 8:45 a.m.)
  52. ^Ronald Edward Zupko(1990).Revolution in measurement: Western European weights and measures since the age of science.American Philosophical Society. p.432.ISBN978-0-87169-186-6.
  53. ^Weights and Measures Act 1985 Baily's Metal. Parliamentary Copy (VI) of the Imperial Standard Yard. 41 & 42 Victoria, Chapter 49. Standard Yard at 62° Faht. Cast in 1878
  54. ^American Football pitch dimensions
  55. ^Canadian Football Pitch dimensions
  56. ^Association Football pitch dimensions,
  57. ^Cricket pitch dimensions
  58. ^Driving Standards Agency (1999),The Highway Code,London: The Stationery Office,ISBN0-11-551977-7,pp. 74–75
  59. ^Penn, Sue (2006)."What are Fat Quarters?".Fat Quarter Quilting.Krause Publications Craft.ISBN9780896891715.
  60. ^Yoder, Corey (2014)."Fat Eighth Bundles".Playful Petals: Learn Simple, Fusible Appliqué.C&T Publishing. p. 23.ISBN9781607057987.
  61. ^The statutes at large.1763. p. 631.
  62. ^Charles Arnold (1850).The boy's arithmetic.p.54.
  63. ^The Encyclopedia Americana.Encyclopedia Americana Corp. 1920. p. 165.
  64. ^Instructions for cutting out apparel for the poor.Sold by J. Walter. 1789. p.53.
  65. ^Isaiah Steen (1846).A treatise on mental arithmetic, in theory and practice.p. 9.
  66. ^Donald Fenna (October 26, 2002).A dictionary of weights, measures, and units.Oxford University Press. pp.130–1.ISBN978-0-19-860522-5.
  67. ^"Popular Mechanics".Popular Mechanics.Hearst Magazines: 248. March 1959.ISSN0032-4558.
  68. ^"On what basis is one inch exactly equal to 25.4 mm? Has the imperial inch been adjusted to give this exact fit and if so when?".National Physical Laboratory.RetrievedJanuary 7,2012.
  69. ^abcdNIST Guide to the SI – section B.6 U.S. survey foot and mile
  70. ^"U.S. Survey Foot".National Institute of Standards and Technology.July 26, 2019.RetrievedJanuary 2,2023.
  71. ^"U.S. Survey Foot: Revised Unit Conversion Factors".NIST.January 4, 2023.
  72. ^NIST Handbook 44 – 2012 Appendix C "General Tables of Units of Measurement" page C-5

Bibliography

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  • The dictionary definition ofyardat Wiktionary
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