English: Hero of Alexandria, Pneumatica 1,16: technical drawing of a hydraulic apparatus of singing artificial birds in the manuscript Venice, Biblioteca Marciana, Gr. 516, fol. 172v.
Deutsch: Heron von Alexandria, Pneumatica 1,16: Technische Zeichnung eines hydraulischen Apparates der singenden künstlichen Vögel in der Handschrift Venedig, Biblioteca Marciana, Gr. 516, fol. 172v.
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