Daniel Gralath

Daniel Gralath (30 May 1708 – 23 July 1767) was a physicist and a mayor of Danzig.

[1] His father-in-law was Jacob Theodor Klein (1685–1759), a city secretary and a distinguished scientist, nicknamed Gedanensium Plinius.

As a physicist, Gralath worked on electricity, founded the Danzig Research Society, and repeated the experiments of Ewald Georg von Kleist with the Leyden jar.

[1] Gralath improved the design of the Leyden jar and demonstrated its effects on a chain of 20 persons.

[4] From 1747 to 1756, he published his "History of Electricity" in three parts in issues of Versuche und Abhandlungen der Naturforschende Gesellschaft in Danzig,[5] which may have contributed to the historical judgement that he was the first to combine several Leyden jars.