More on the great xylophone controversy:

A reader sez:

_Harper’s Dictionary of Music_ states that a xylophone “consists of a set of wooden bars of different lengths.” It notes that “stone slabs, bamboo tubes and metal bars have beenused in a similar way by ancient and primitive peoples.” It does not mention teeth. A marimba also is essentially a set of wooden bars, while the glockenspiel and vibraphone involve metal bars. Concerning dental percussion: I have seen a jawbone used as a rhythm instument, with the performer scraping a stick over the teeth. (The jawbone in this instance was probably that of a cow; the jawbone of an ass is another matter.)

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