Treatise On Harmony [DIRECT]

: Defined the three-note triad as the primary unit of harmony.

: Introduced the idea that every chord has a "root" note, regardless of how the other notes are arranged. Treatise on Harmony

Focuses on 19th-century thought, available at Barnes & Noble ($22.95). Treatise on Harmony - Dover Publications : Defined the three-note triad as the primary

: Argued that harmony is derived from natural laws, specifically string vibrations and the overtone series. Treatise on Harmony

Modern editions of Rameau's work and other famous harmony treatises are available from major retailers. (Jean-Philippe Rameau) Revised edition by Dover Publications ($21.95). Also available at Books A Million ($21.95). Alfred Day's Treatise on Harmony (1845)

A historically controversial and complex work available at Books A Million ($40.00). (William Pole, 1883)