Organum mathematicum (instrument)
From GATE
The Organum Mathematicum was an information device or teaching machine invented by the Jesuit polymath and scholar Athanasius Kircher.
Its operating principles were described by Kaspar Schott in his work Organum mathematicum libris IX. explicatum published in 1668.
One version of the Organum is preserved by the Museo Galileo in Florence [1].
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