Neatorama Posts Tagged "IPK"
The Kilogram Put On Some Weight...

The International Prototype of the Kilog...  ...ternational Prototype Kilogram or the IPK -- is the standard against which all other measur...  ...in Paris, forty official replicas of the IPK were made in 1884 and distributed aro...  ...NPL). But despite efforts to protect the *s...

http://www.neatorama.com/2013/01/08/The-Kilogram-Put-On-Some-Weight/
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