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To Promote DIY Metric Rulers in the 18th Century, Paris Placed Meter-Long Marble Blocks on Public Buildings - Core77
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To Promote DIY Metric Rulers in the 18th Century, Paris Placed Meter-Long Marble Blocks on Public Buildings - Core77
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The International Bureau of Weights and Measures (BIPM) at Sèvres made 31 prototype line standards of platinum - 10 percent iridium alloy. These have Stock Photo - Alamy
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World's first Meter Model. France (1799) figures out the Meter. History, intrigue & more! ooh! - YouTube
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