Why did Pythagoras pause outside a Blacksmith's workshop? Can the nature of Harmony really be understood visually? Why do harmonies leave gaps or commas when added together? In this charming pocket book, Anthony Ashton uses a Victorian device known as a Harmonograph to tell the ancient story of Harmony and the intervals of the scale. With useful appendices and fine line drawings, this is a unique and original introduction to this universal subject. "Beautiful" - London Review of Books