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 be pronounced by Dr Johnson to be one of the most pleasing tragedies in the language. Also in 1703 Sir Richard Steele's comedy "The Tender Husband" achieved some success. In 1704, Jonathan Swift (Irish satirist) published "A Tale of a Tub" and "The Battle of the Books" and John Dennis published his "Grounds of Criticism in Poetry". "The Battle of the Books" begins with a reference to the use of a glass (which, in those days, would mean either a mirror or a magnifying glass) as a comparison to the use of satire. Swift is, in this, very much the