Simplify the following text for a Grade 8 native English-speaking person.
Original: The effects of this Kleistian jar were independently discovered around the same time by Dutch scientists Pieter van Musschenbroek and Cunaeus at the University of Leiden . Musschenbroek communicated on it with the French scientific community where it was called the Leyden jar .
Simplified: The Dutch scientist Pieter van Musschenbroek in Leiden ( Leyden ) about two years later .