Traité de l'harmonie vniverselle : où est contenu la musique theorique & pratique des anciens & modernes, auec les causes de ses effets : enrichie de raisons prises de la philosophie, & des mathematiques
Marin Mersenne's 1627 Paris treatise on music theory, printed for Guillaume Baudry, sets out ancient and modern theory and practice with explanations drawn from philosophy and mathematics. Its pictures are tabular solmization charts of hexachord syllables beside geometric diagrams of concentric semicircles and intersecting lines, useful for designers wanting schematic, letterpress-era diagram layouts.
