Share 'Glass Armonica'

The glass armonica, also known as glass harmonica, was invented by Benjamin Franklin in 1761. It consists of glass bowls tuned by size, mounted one inside each other with cork on a metal spindle. The glasses are made to spin with a flywheel attached to a foot treadle. Moistened fingers rub the exposed rims of the glasses to produce one of the most beautiful sounds ever created by man. Jefferson…