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Electric discharges in rarefied gases, 1892. 2, 3, 5 and 6: Geissler tubes. 1: fluorescence of sulphuret of calcium. 4: nitrogen vacuum (spirals of uranium glass). 7: hydrogen
Discharge in Geissler tubes containing rarefied gases, 1887Discharge in Geissler tubes containing rarefied gases. Investigations of these phenomena led to the discovery of cathode rays, x-rays and electrons. From A. Ganot Natural Philosophy. (London, 1887)
William Crookes, British physicist and chemist, 1903. Artist: SpyWilliam Crookes, British physicist and chemist, 1903. Crookes (1832-1919) holding the discharge tube which carries his name
