Music – Laker, Karl. – Die Quinten-Uhr. Anschauliche Darstellung der den Quinten-Zirkel und das Verhältnis von reiner zu temperierter Stimmung betreffenden musikalischen Begriffe und Gesezte.

Karl Laker (1859-1956) was engaged with the problems of musical theory, like the balance between temperate and absolute tune. His mean concern was to depict the sound system and the problems of temper threough simple mechanic devises. One of this devises is included in this book. – Rare.