Ocular harpsichord: colour-sound analogy at large in The Enlightenment by Holmes Duffy, R

“…Yet Castel wrote many works about his device, using it to construct his persona and generate publicity for his œuvre and universal system. This thesis combines close reading of primary sources, intellectual history, and literary analysis using the tradition of classical rhetoric to explain what the ocular harpsichord was, how its history as a material instrument unfolded, and what it meant to Castel and his readers.…”