File:Benjamin Franklin's Glass Harmonica (LoC) Edited.jpg
LoC notes: Before leaving London in July 1762, Franklin wrote to the Italian philosopher Giambatista Beccaria. Not having anything new to report on their shared interest in electricity, Franklin described the improvements he had made to the musical glasses invented by Richard Puckeridge. [...]
LoC description: L'Armonica: Lettera del Signor Beniamino Franklin al Padre Giambatista Beccaria, Regio Professore di Fisica nell' Univ. di Torino. Page 2 [Milano?:1776?]
Français : Le glassharmonica ('harmonica de verre' ou 'armonica de verre') de Benjamin Franklin.
Português: La armônica de Benjamin Franklin, feita de várias taças de formatos diferentes.
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