Item Type: Publication

Summary

Full Description: An original slip-cased Harmonic Diagram, in fine condition, and with the inked stamp of "Physical Society, London". The central rotating disc has its original ivory button and rear securing screw, and the thick board mount is engraved in the plate "C Wheatstone, Jan y 1st., 1824". http://libraries.mit.edu/archives/exhibits/harmonic/ Visit here for more information on this early Wheatstone invention.

Source Catalogue No: The Concertina Museum: 1.2.4-001