Simplify the following text for a Grade 8 native English-speaking person.
Original: It was invented independently by German cleric Ewald Georg von Kleist on 11 October 1744 and by Dutch scientist Pieter van Musschenbroek of Leiden ( Leyden ) in 1745 â `` 1746 .
Simplified: Ewald Georg von Kleist developed this system in Germany in 1744 . The Dutch scientist Pieter van Musschenbroek in Leiden ( Leyden ) about two years later .