Field Notes

Dava Sobel

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Field Notes

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Sevres Cedex, France-What I love best about the kilogram is its tangibility, its solid, sculpted form of shiny platinum and iridium. I'm referring to not just any kilogram but the quintessential one that resides here-the actual International Prototype Kilogram, or IPK, created in 1879 as the official standard of mass. It's a smooth cylinder of alloy, only an inch and a half high and an inch and a half in diameter. Though petite, the IPK is necessarily dense; it weighs 2.2046 pounds. If you went to pick it up, you might think someone had cemented it to the tabletop for a prank. Even if you knew what to expect, its compact heft would still boggle your senses.

机译：法国塞夫雷斯·塞德克斯（Sevres Cedex）-我最钟爱的是千克的有形性，坚实的雕刻形式的闪亮的铂金和铱。我指的不仅仅是这里的任何公斤，而是这里所代表的最典型的公斤-实际的国际原型公斤或IPK，它是1879年制定的官方质量标准。它是一个光滑的合金圆柱体，直径只有一英寸半半英寸。 IPK虽然小巧，但必定密集。它重2.2046磅。如果您去捡它，您可能会认为有人将它粘在桌面上作恶作剧。即使您知道会发生什么，它紧凑的重量仍然会让您感到不舒服。

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《Discover》 |2009年第3期|p.28-29|共2页
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Dava Sobel;
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中图分类自然科学总论;
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