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The first proposal for the adoption of the decimal metric system in Portugal appears in Chichorro's report on weights and measures (Memória sobre Pesos e Medidas, 1795 [5]). Two decades later, in 1814, Portugal was the second country in the world – after France itself – to officially adopt the metric system. [6]
The moio was used in Portugal and its colonies until the first half of the 19th century. In 1852, Portugal adopted the metric system. Brazil, an independent nation since 1822, adopted the metric system in 1861.
In 1814, Portugal adopted the metric system, but with the names of the units substituted by Portuguese traditional ones. In this system, the basic units were the mão-travessa (hand) = 1 decimetre (10 mão-travessas = 1 vara (yard) = 1 metre), the canada = 1 litre and the libra (pound) = 1 kilogram. [61]
In 1814 as part of the Portuguese Empire, Brazil adopted the new Portuguese metric system, which was based in the original metric system, but with its units having Portuguese traditional names. This system was not, however, widely adopted and was soon abandoned, with the Portuguese customary units continuing to be used. [citation needed]
In France it used to be defined as 100 livres (pounds), about 48.95 kg (108 lb), and has been redefined as 100 kg (mesures usuelles), thus called metric quintal with symbol qq. In Spain , the quintal is still defined as 100 libras , or about 46 kg (101 lb), but the metric quintal is also defined as 100 kg; [ 3 ] In Portugal a quintal is 128 ...
It was used along with the metric system for a while, but is long discontinued. A metric lieue was used in France from 1812 to 1840, with 1 metric lieue being exactly 4,000 m, or 4 km (about 2.5 mi). [4] It is this unit that is referenced in both the title and the body text of Jules Verne's novel Twenty Thousand Leagues Under the Seas (1870). [5]
The related toesa (Portuguese pronunciation:) was used in Portugal, Brazil, and other parts of the Portuguese Empire until the adoption of the metric system. The name is derived from the Latin tensa brachia, meaning "outstretched arms". [1]
The International System of Units is the modern metric system. It is based on the metre–kilogram–second–ampere (MKSA) system of units from early in the 20th century. [20] It also includes numerous coherent derived units for common quantities like power (watt) and irradience (lumen).