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Thanks, an amazingly beautiful demonstration which seems not very wide known. Here is the video from "Harvard Natural Sciences Lecture Demonstrations" which is

Thanks, an amazingly beautiful demonstration which seems not very wide known. Here is the video from "Harvard Natural Sciences Lecture Demonstrations" which is quite beautiful (just the thing at work, without distractions) http://www.youtube.com/watch?v=e3fi6uyyrEs http://www.youtube.com/watch?v=e3fi6uyyrEs

ejr 12y ago
That's very cool. Brian Cox did a variation on his programme with an added hot water bottle on top : https://www.youtube.com/watch?v=fWxfliNAI3U https://www.youtube.com/watch?v=fWxfliNAI3U