Talk:Electromagnetic oscillograph

External links modified
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I have just modified one external link on Electromagnetic oscillograph. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
 * Added archive https://web.archive.org/web/20090211063906/http://chem.ch.huji.ac.il/history/duddell.html to http://chem.ch.huji.ac.il/history/duddell.html

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Cheers.— InternetArchiveBot  (Report bug) 03:28, 19 September 2017 (UTC)