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Instrument with volvelles from Regiomontanus: Kalendarium | by University of Glasgow Library
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Instrument with volvelles from Regiomontanus: Kalendarium

Regiomontanus, Joannes: Kalendarium. Venice: Erhardus Ratdolt, 1482. An instrument with volvelles, or paper wheels, which can be manipulated to show the motion of the moon ([29v]). Sp Coll BD7-f.13 (item 1 of 4 bound together).

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Taken on April 1, 2010