barrel of mathematics of the English system is incorrectly written and it should be written as "Barrel" being its meaning:
In mathematics, the English system is a system of measures for lengths, areas, volumes, capacity and pesos, following traditions but not the metric decimal which is much easier to make conversions and equivalences. English measures suffer from the lack of consistency between one and another measure. There is also division between equivalences of the system operated in the United States and used in England ( also called Imperial 41 system; There are differences between them. In the system all decimal is very easy because there is regularity between the proportionality of a measure to another, because multiples and submultiples vary from 10 to 10, not that does not occur when using the English system. With respect to the barrel, it is a measure of capacity, used especially in the oil industry, England or imperial barrel is used usually for measurement of liquids, which equals 42 gallons U.S. barrel and 35 gallons. In the same way a gringo barrel equals 158,98 liters and one imperial 159,11 litres, which makes a gringo barrel 0,15898 cubic meters and the imperial 0,15911 ( the difference is approximately 41 diesmilesimas 13; or is a barrel and another difference is 1.3 cubic Decimeters.
English system in mathematics, is the same as irregular or complex system because the were between multiples and submultiples do not have a consistent differentiation and makes cuts and equivalences between one and another measure not equal ( a measure to another can vary from 5-, 35-, 42-, or many different times amounts ). In the metric system or regular, everything is easier because the proportionality of one to another measure, van 10 in 10 scales, which facilitates a lot any conversion. An American barrel equals 42 gallons, and an English barrel to 35.
