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How Did The Meter Get Its Length?

04:38
One of 30 copies of the first protoype meter made by the International Bureau of Weights and Measures (BIPM) in Sevres, France. 1875-1889 <em> </em> (NIST Museum Collection)
One of 30 copies of the first protoype meter made by the International Bureau of Weights and Measures (BIPM) in Sevres, France. 1875-1889 (NIST Museum Collection)

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