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
Marcantonio Colonna (18th-century cardinal) Marcantonio Colonna (18th-century cardinal) Marcantonio Colonna (16 August 1724 – 4 December 1793) was an Italian Catholic cardinal. Born in Rome on 16 August 1724, Colonna was made Cardinal-Deacon of Santa Maria by in Aquiro Pope Clement XIII on 19 November 1759. He was then ordained a deacon on 9 March 1760 and a priest on 1 February 1761. He was appointed Titular Archbishop of Corinthus and Cardinal-Priest of Santa Maria della Pace by Pope Clement XIII on 19 April 1762. Soon thereafter, on 25 April, Colonna was ordained a bishop. Pope Clement XIII acted as his consecrator and Pope