London's Newest Library Has a Copper Lined Room That Blocks Messages and Emails (londonist.com) 2 points by aries1980 4y ago ↗ HN
[–] simonblack 4y ago ↗ "Copper Lined Room" = run-of-the-mill Faraday cage.https://en.wikipedia.org/wiki/Faraday_cage
1 comment
[ 2.9 ms ] story [ 14.7 ms ] threadhttps://en.wikipedia.org/wiki/Faraday_cage