Harmonica (1879)

[…] The following little piece for the Harmonica was composed by Beethoven for the 'Leonora Prohaska' of his friend Duncker in 1814 or 15. The autograph is preserved in the Library of the Gesellschaft der Musikfreunde at Vienna, and has not before been published.

Beethoven, Komposition für Glasharmonika

The name Harmonica is now used for a toyinstrument of plates of glass hung on two tapes and struck with hammers. [Grove Dictionary 1879, 662f]