Exposition de la Theorie et de la Pratique de la Musique, Suivant les nouvelles decouvertes ... Seconde Édition Corrigé & augmenté par l'Auteur

Paris: Chez F.G. Deschamps Libraire, rue S. Jacques, aux Associés, 1764. Octavo. Full dark tan mottled calf with raised bands on spine in decorative compartments gilt, dark red title label gilt, marbled endpapers and edges. 1f. (recto half-title, verso blank), 1f. (recto title, verso blank), [v]-xii ("Preface"), [xiii]-xvi (contents), 331, [iv] ("Approbation" and "Privilége du Roi"), [i] (blank) + 60 pp. engraved music.

Binding worn, rubbed, bumped, and abraded; head of spine chipped; hinges tender; endpapers worn. Light uniform browning; minor contemporary annotation to p. 57; minor worming to upper inner portion of most leaves, a bit heavier to some leaves, occasionally affecting text. Gregory-Bartlett p. 33. Hirsch I, 66. Scarce.

The second edition of the work first published in 1754.

"Although best-known for his Exposition (1754), Béthizy also clarified, expanded and revised some of Rameau's ideas and formulated several of his own. His concept of 'censée-toniques' and his use of barred figures for dominant chords were adopted by Rameau in his Code de musique pratique (1760). D'Alembert and Béthizy quarrelled over Rameau's theories in the Journal oeconomique following the publication of d'Alembert's Elémens in 1752. Nevertheless in the second edition (1762) d'Alembert recommended the Exposition as a practical supplement." A. Louise H. Earhart in Grove Music Online

Only two of Béthizy's musical compositions have survived, the cantailles Le transport amoureux and Le volage fixé.