"In 1761, while living in England, Franklin heard a performer playing musical glasses. Franklin wrote: 'He collected a number of glasses of different sizes, fixed them near each other on a table, and tuned them by putting into them water, more or less as each note required. The tones were brought out by passing his fingers round their brims.'
"Franklin was charmed by the music, but felt that there was a better way to create the same sound. He had a glassmaker create thirty-seven hemispheres made of glass, with each hemisphere being a different size and thickness to produce different pitches..."
Composer William Zeitler.
Please Visit Texas POEtrope