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 in literature 18th Century Europe started in the Age of Enlightenment and gradually moved towards Romanticism. In the visual arts, it was the period of Neoclassicism. See also: The 18th century in Europe was The Age of Enlightenment and literature explored themes of social upheaval, reversals of personal status, political satire, geographical exploration and the comparison between the supposed natural state of man and the supposed civilized state of man. Edmund Burke, in his "A Vindication of Natural Society" (2000), says: ""The Fabrick of Superstition has in this our Age and Nation received much ruder Shocks than it had ever felt before;