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Keywords from Image Description:
Organum Mathematicum Music Sample Columns. en Illustration of musical rods used in the Athanaius Kircher's Organum Mathematicum illustrated in Organum Mathematicum by Gaspar Schott Very similar rods were originally used in Kircher's Arca Musarithmica Organum Mathematicum Gaspar Schott Athanasius Kircher PDold Books by Athanasius