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
Political history of Mysore and Coorg (1761–1799) Political history of Mysore and Coorg (1761–1799) The political history of Mysore and Coorg (1761–1799) is the political history of the contiguous historical regions of Mysore State and Coorg province on the Deccan Plateau in west-central peninsular India from the time of the rise of Haidar Ali in 1761 to that of the death of his son Tipu Sultan in 1799. There is very little contemporaneous documentation of the pre-1760 period of Mysore's history, especially the last century of that period. According to , the 18th-century Wodeyar rulers of Mysore—in contrast to their contemporaries in Rajputana, Central India, Maratha Deccan,