Gray, Stephen, 1666–1736, English physicist. Gray, a dyer by trade, cultivated science as a hobby. In 1696 he published an account of a magnifying glass that interested the Royal Society and from then on he frequently sent the Society and his patron, English Astronomer Royal John Flamsteed, ideas for simple but revealing experiments and reports of geological and astronomical observations. Gray's most important work, published in 1732, announced the discovery of electrical induction and the distinction between conductors and insulators.
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