Pieter van Musschenbroek (1692-1761) [Wikipedia] Leyden jar
1746	[Secondary Source] Abraham Wolf A History of Science, Technology and Philosophy in the 18th century. Volume One (George Allen & Unwin Ltd., London, 1922) pp. 221-225. Paul Fleury Mottelay Bibliographical History of Electricity and Magnetism (Charles Griffin & Co. Ltd., London, 1922) pp. 173-175. [Archive] [Primary Source?] Abbe Nollet in Mem. de l'Acad. Roy. des Sciences, Paris, 1746, pp. 1-23.
Ewald Georg von Kleist (1700-1748) [Wikipedia] Leyden jar
1745	[Secondary Source] A. Wolf A History of Science, Technology and Philosophy in the 18th century. Volume One (George Allen & Unwin Ltd., London, 1922) pp. 221-225. Paul Fleury Mottelay Bibliographical History of Electricity and Magnetism (Charles Griffin & Co. Ltd., London, 1922) pp. 173-175. [Archive] [Primary Source?] Not Yet Checked