Electron Paramagnetic Resonance

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Echoes in the 17th Century

In his book "Neue Hall- und Thonkunst, oder mechanische Geheim-Verbindung der Kunst und Natur" the famous renaissance scientist Athanasius Kircher (1602-1680) discussed the following problems:

"Question: If it were possible to create such an echo which would speak words other than these which were initially called"
"Question: If it were possible to create such an echo which would speak words other than these which were initially called"
"To artificially create an echo such that the voice answers in a different language every time."
"To artificially create an echo such that the voice answers in a different language every time."
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