Wheatstone's kaleidophone, French, mid-19th century, by Lancelot,J. of Paris. Base plate (timber, with screw threads, proud), six steel bars mounted via brass pillars on the upstanding screws, plus leather pounder (handle replaced).
Wheatstone's kaleidophone, French, mid-19th century, by Lancelot,J. of Paris. Base plate (timber, with screw threads, proud), six steel bars mounted via brass pillars on the upstanding screws, plus leather pounder (handle replaced).