Harry Partch Instruments On-Line

From The American Mavericks Site

Harry Partch (June 24, 1901 – September 3, 1974) was an American composer and instrument creator. He was one of the first twentieth-century composers to work extensively and systematically with microtonal scales, writing much of his music for custom-made instruments that he built himself, tuned in 11-limit (43-tone) just intonation.”
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O Frabjous Day The Jobberwack