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L’organisation d’ensemble du livre II des Ῥυθμικὰ στοιχεῖα d’Aristoxène de Tarente

The study of evidence on the content of Book II of Aristoxenus’ Ῥυθμικὰ στοιχεῖα
shows that it was composed of an introduction and six chapters : a περὶ χρόνων (the
distinction between ῥυθμός and ῥυθμιζόμενα, the μεγέθη τῶν χρόνων, the χρόνος πρῶτος
and the χρόνοι τῆς ῥυθμοποιίας ἴδιοι), a περὶ ποδῶν (their definition, μέρη, rationality and
διαφοραί), a περὶ γενῶν τῶν ποδῶν (the three γένη of the συνεχὴς ῥυθμοποιία, their respective πόδες, their size, the refutation of the arithmetical theory of the κανονικοί and the
recapitulation of the πόδες proper to each γένος), a περὶ ῥυθμῶν (the definition of
ῥυθμός, the διαφοραὶ τῶν ῥυθμῶν and their classification), a περὶ ἀγωγῆς (the definition
of ἀγωγή, its interdependence with the χρόνος πρῶτος and its limitation by αἴσθησις)
and a περὶ μεταβολῆς (the definition of the ῥυθμικὴ μεταβολή and its twelve τρόποι). As
for ῥυθμοποιία, it must have been discussed in Book III.