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
18th-century French literature movement, which emerged in reaction to the first movement; the beginnings of Romanticism, which exalted the role of emotion in art and life. In common with a similar movement in England at the same time, the writers of 18th century France were critical, skeptical and innovative. Their lasting contributions were the ideas of liberty, toleration, humanitarianism, equality, and progress, which became the ideals of modern western democracy. The 18th century saw the gradual weakening of the absolute monarchy constructed by Louis XIV. Its power slipped away during the Regency of Philippe d'Orléans, (1715–1723) and the long regime of King Louis