Валерий Мельников

Валерий Мельников

Валерий Мельников
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Шлем концентрации из XX века - http://things.lifehacker.ru/2014/06/27/shlem-koncentracii-iz-xx-veka/

1925 The Isolator is a bizarre helmet invented in 1925 that encourages focus and concentration by rendering the wearer deaf, piping them full of oxygen, and limiting their vision to a tiny horizontal slit. The Isolator was invented by Hugo Gernsback,.