1879+William+Crookes

Type in the content of your new page here....  William Crookes William Crookes discovered thalium a green element, identified the first known sample of helium also an element and invented the radiometer whitch measures radiation intensity, the Crooks tube a experimental electrical discharge tube and investigated canal rays beams of positive ions.Crookes was one of the first to investigate what are now plasmas ionized gas.

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