Imperial Units(Of measurement)

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FeetYards

Gallon

FeetHistorically the foot was also used in a number of other systems of units including those from Ancient Greece, Ancient Rome, England, Scotland and many other Continental European countries. However, the size of the measure varied from country to country and in some cases from city to city mostly the foot was used to measure distance. Confusion between the British foot (304.8mm) and the French foot (322.5mm or 329.8mm) accrued. The Roman foot was introduced to Britain in the 1st century AD. The length of the Roman foot has been estimated at 296 mm or 11.65 inches. In the 5th century, the Anglo-Saxons introduced the North German foot of 335 mm (13.2 inches). The new foot was used for land measurement, while the Roman foot continued to be used in the construction crafts. Some time between 1266 and 1303 the weights and measures of England were all different. Henry III introduced a different type of foot it was the size 10/11 the approximately the size of a fully grown mans foot.

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YardsA yard is a unit of length in several different systems including Imperial units and the former English units. It is equal to 3 feet or 36 inches. Under an agreement in 1959 between Australia, Canada, New Zealand, South Africa, the United Kingdom and the United States, the yard was legally defined to be exactly 0.9144 metres. Due to that previous date, the legal definition of the yard when expressed in terms of metric units varied slightly from country to country.

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GallonsThe gallon is a measure of volume that was used in many parts of Western Europe. Historically its value differed depending on locality and commodity. In most localities it has been replaced by the litre. The gallon, be it the imperial or US gallon, is sometimes found in other English-speaking countries. Gallon means liquid.

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