Ewald Jürgen Georg von Kleist (June 1700 - December 10, 1748) was the dean of the cathedral at Kammin in Prussia and co-inventor of the Leyden jar. June is the sixth month of the year in the Gregorian Calendar and one of four with the length of 30 days. ... Events January 1 - Russia accepts Julian calendar. ... December 10 is the 344th day (345th in leap years) of the year in the Gregorian calendar. ... Events April 24 - A congress assembles at Aix-la-Chapelle with the intent to conclude the struggle known as the War of Austrian Succession - at October 18 - The Treaty of Aix-la-Chapelle is signed to end the war Adam Smith begins to deliver public lectures in Edinburgh Building of... The coat of arms of the Kingdom of Prussia, 1701-1918 The word Prussia (German: Preußen or Preussen, Polish: Prusy, Lithuanian: Prūsai, Latin: Borussia) has had various (often contradictory) meanings: The land of the Baltic Prussians (in what is now parts of southern Lithuania, the Kaliningrad exclave of Russia and... Original capacitor The Leyden jar was the original capacitor, developed in the 18th century and used to conduct many early experiments in electricity. ...