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London's Newest Library Has a Copper Lined Room That Blocks Messages and Emails
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(londonist.com)
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aries1980
4y ago
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London's Newest Library Has a Copper Lined Room That Blocks Messages and Emails | Better HN
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simonblack
4y ago
"Copper Lined Room" = run-of-the-mill Faraday cage.
https://en.wikipedia.org/wiki/Faraday_cage
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