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
Governance in 18th-century piracy and gunpowder up to the deck. Pirate articles were based on the "chasse-partie" created on buccaneer ships in the 17th century. The "chasse-partie" determined the division of plunder among the crew as well as other rules. 18th-century pirates built upon this concept and created their own version of "Articles of Agreement." Before setting out on their expedition, pirates wrote their articles alongside the election of a captain or quartermaster. The articles needed the consent of every crew member, and “all [pirates] swore to ‘em” sometimes on a Bible or whatever was at hand. During the election of a new captain,