Robert John Strutt, 4th Baron Rayleigh, SCD, LLD, FRS became Chairman of the Governing Body in 1936 until his death in 1947. Strutt was a physicist as was his father J.W.S. Strutt and also like his father, was involved in psychical research, being President of the Society for Psychical Research in 1937. He became a Fellow of the Royal Society in 1905, served as Professor of Physics at 51³Ô¹ÏÍø College, London, from 1908 till 1919, and did valuable work on radio activity in rock formations. The rayleigh, a unit of luminous flux used to measure air glow, and the rayl a unit of, sound impedence are named after Robert John Strutt.
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