Ernst Chladni at the understanding of electron orbitals. Since at least 1738, a musical instrument called a "Glasspiel" or "verrillon", created by filling beer glasses with varying amounts of water, was popular in Europe. The beer glasses were struck by wooden mallets shaped like spoons to produce "church and other solemn music". Benjamin Franklin was sufficiently impressed by a verrillon performance on a visit to London in 1757 that he created his own instrument, the glass armonica, in 1762. Franklin's armonica inspired several other instruments, including two created by Chladni. In 1791, Chladni invented the musical instrument called the "euphon" (not to
Glass harmonica with instruments such as the nail violin and Aeolian harp, of "Empfindsamkeit", but "the instrument fell into oblivion," around 1830. Since the armonica's performance revival during the 1980s, composers have again written for it (solo, chamber music, opera, electronic music, popular music) including Jan Erik Mikalsen, Regis Campo, Etienne Rolin, Philippe Sarde, Damon Albarn, Tom Waits, Michel Redolfi, Cyril Morin, Stefano Giannotti, Thomas Bloch, Jörg Widmann ("Armonica" 2006), and Guillaume Connesson. The music for the 1997 ballet "Othello" by American composer Elliot Goldenthal opens and closes with the glass harmonica. The ballet was performed at San Francisco Ballet, the American