The terpodion or uranion is a keyboard instrument which produces sound using the same friction principle as the glass harmonica. Instead of rotating glass bells a wooden cylinder is rotating. This cylinder is coated with a special mixture. Only 25 instruments were ever built by Christian Friedrich Ludwig Buschmann, the son of Johann David Buschman...
Found on
http://en.wikipedia.org/wiki/Terpodion
piano-like instrument whose sound is made from wooden blocks
Found on
http://phrontistery.info/t.html
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