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Keywords: OrganumMathematicum.jpg en The Organum Mathematicum An information device conceived by Athanasius Kircher and illustrated in Gaspar Schott's 1668 book Organum Mathematicum It is a wooden chest containing slats or rods which aid in various calculations including Arithmetic Geometry Fortifications Chronology Horology Astronomy Astrology Cryptography and Music Composition Organum Mathematicum Gaspar Schott Athanasius Kircher 1668 PD-old-100-1923 Uncategorized 2013 October 12 |