Van Helmont, Baron Francis Mercuirius
Van Helmont, Baron Francis Mercuirius a Dutch physician and religious enthusiast, was born in 1618; settled in England, as the family physician of lady Conway, at Ragley, and thus became the associate of Henry Moore (q.v.). He was the son of the well known chemist Van Helmont, and gave himself to those occult medical studies which were a passion with his father. His works were noted for their eccentricities. He died in 1699. See Tullock, Rational Theol. in England in the 17th Cent. 2, 329.