Talk:Barton's pendulums

External links modified
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I have just modified 1 one external link on Barton's pendulums. 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/20120204062124/http://www.physics.umd.edu/lecdem/services/demos/demosg2/g2-12.htm to http://www.physics.umd.edu/lecdem/services/demos/demosg2/g2-12.htm

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Cheers.— InternetArchiveBot  (Report bug) 20:42, 27 October 2016 (UTC)