vocal apparatus; Illustration to the anatomy of the vocal apparatus of various species and humans from the 17th century; unsigned;; Plate 2; after p. 22; 1650; Athanasius Kircher: [...] Musurgia universalis; sive ars magna consoni et dissoni; in X libros digesta: qua uniuersa sonorum doctrina; & philosophia; musicaeque tam theoricae; quam practicae scientia; summa varietate traditur [...]. Romae: ex typographia haeredum Francisci Corbelleti; 1650