Le cycle harmonique - Huygens, Christiaan 1629-1695; Rasch, Rudolf 1945- (Utrecht Diapason Press, 1986)
Includes the text of Lettre touchant le cycle harmonique, which was published in the Oct. 1691 issue of Histoire des Ouvrages de Sçavans.
Le cycle harmonique (Rotterdam 1691). Novus cyclus harmonicus (Leiden 1724): with Dutch and English translations
Keywords: Musical temperament; Tuning; Music Theory