Stephen Gray (1666-15.02.1736) was an English physicist and a Fellow of the Royal Society (1732).
His main research was in electricity. In 1729 he discovered electrical conduction, establishing that electricity can be transmitted from one body to another along a metal wire or a spun thread, but cannot be transmitted along a silk thread. He was the first to divide all bodies into conductors and non-conductors of electricity. He reliably confirmed the existence of electrostatic induction and showed that electric charge is distributed over the surface of a body.