sir crookes

Crookes

[krooks]
noun
Sir William, 1832–1919, English chemist and physicist: discovered the element thallium and the cathode ray.
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World English Dictionary
Crookes (krʊks)
 
n
Sir William. 1832--1919, English chemist and physicist: he investigated the properties of cathode rays and invented a type of radiometer and the lens named after him

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Science Dictionary
Crookes   (krks)  Pronunciation Key 
British chemist and physicist who discovered thallium in 1861 and invented the radiometer (1873-76). He also developed the Crookes tube, a modified vacuum tube that was later used by W.C. Roentgen and J.J. Thomson in experiments that led to the discovery of x-rays and the electron, respectively.
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