Imperial yard

Eventually, ancient rules of thumb gave way to more carefully defined units. The metric system was adopted in France in 1799 and the British Imperial System of units was established in 1824. In 1893, the English units used in the United States were redefined in terms of their metric equivalents the yard was defined as 0.9144 meter, and so on. But English units continue to be used in the United States to this day, even though the Omnibus Trade and Competitiveness Act of 1988 stated that it is the declared policy of the United States...to designate the metric system of measurement as the preferred system of weights and measures for United States trade and commerce. ... 

Much modern bronze contains 10 of tin, 2 of zinc, the remainder being copper. An alloy consisting of Cu Sn Zn as 16 2-5 1 was used in the construction of the Imperial Standard Yard in 1845 (p. 308). 

Imperial units The British system of units based on the pound and the yard. The former f.p.s. system was used in engineering and was loosely based on Imperial units for all scientific purposes SI units are now used. Imperial units are also being replaced for general purposes by metric units. 

The old Imperial (now UK) system was originally defined by three standard measures - the yard, the pound and the gallon which were held in London. They... 

Imperial units A British non-metric system of weights and measures. The system includes the ounce, pound, stone, inch, foot, yard, mile, acre, pint, quart, gallon, etc. It has largely been replaced by SI units for scientific and engineering applications although there is still some usage. 

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