Pieter van Musschenbroek is credited with inventing both the Leyden jar and the Tribometer.
 It was invented by the 18th century Dutch scientist Musschenbroek 
Pieter van Musschenbroek (14 March 1692  19 September 1761) was a Dutch scientist. 
 He is credited with the invention of the first capacitor in 1746: the Leyden jar. 
