Sir William Crookes OM PRS

scientist, Knight Bachelor (from 1897), Order of Merit recipient (from 1910), and 41st President of the Royal Society (1913-1915)

Died aged c. 87

Sir William Crookes OM PRS (/krʊks/; 17 June 1832 – 4 April 1919) was a British chemist and physicist who attended the Royal College of Chemistry, now part of Imperial College London, and worked on spectroscopy. He was a pioneer of vacuum tubes, inventing the Crookes tube which was made in 1875. This was a foundational discovery that eventually changed the whole of chemistry and physics. He is credited with discovering the element thallium, announced in 1861, with the help of spectroscopy. He was also the first to describe the spectrum of terrestrial helium, in 1865. Crookes was the inventor of the Crookes radiometer but did not discern the true explanation of the phenomenon he detected. Crookes also invented a 100% ultraviolet blocking sunglass lens. For a time, he was interested in spiritualism and became president of the Society for Psychical Research.

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Commemorated on 1 plaque

Sir William Crookes 1832-1919 scientist lived here from 1880 until his death

7 Kensington Park Gardens, Notting Hill, W11, London, United Kingdom where they lived (1880-1919)