THE STONE HARMONICON.
Stones must be found which, when freely suspended, are sonorous when struck, and those giving out the notes and half-notes of the diatonic and chromatic gamut are to be hung in a frame in proper order.
They are played upon with blows of a little hammer.
Hard wood can be also employed, mounted on a frame, and struck at one end, being the “bones” of the African under another phase.