Crookes, William (18 May 1861) "Further remarks on the supposed new metalloid," Chemical News, vol. 3, p. 303.
The difference between "Crookes tubes" and "Geissler tubes" is this: In a Geissler tube the exhaustion is very much less than in a Crookes tube, the light which we see in the Geissler tube being due to the luminescence of the residual gas. (Transactions, Volume 9. Hertfordshire Natural History Society and Field Club. The Club, 1898. Page 136.)
Alexander E. Outerbridge, Jr., A Fourth State of Matter. Lecture delivered before the Franklin Institute, 17 February 1881. Journal of the Franklin Institute of the State of Pennsylvania, Volume 81. By Franklin Institute (Philadelphia, Pa.). Page 287+.
William Crookes, On Radiant Matter. Lecture delivered before the British Association for the Advancement of Science, at Sheffield, Friday, 22 August 1879. The Popular Science Monthly, Volume 16. D. Appleton, 1880. Pg157+
Radio-activity induced by the oscillatory discharge, or, The subsequent radio-active emanation from substances exposed to the Tesla oscillatory discharge. Harry Marshall Diemer, Ralph Stuart Cooper. Cornell University, 1903. Page 43+.
Dyer, B.; Thorpe, T. E.; Harker, J. A.; Simmonds, C.; Perkin, F. Mollwo (1920). "Obituary notices: Sir William Crookes, O.M., 1832–1919; Thomas Fairley, 1843–1919; Walter William Fisher, 1842–1920; Antoine Paul Nicolas Franchimont, 1844–1919; Harold Cecil Greenwood, 1887–1919; Charles Edward Groves, 1841–1920; John Holmes, 1871–1919; Sir Boverton Redwood, Bart., 1846–1919; John Charles Umney, 1868–1919". J. Chem. Soc., Trans. 117: 444–472. doi:10.1039/CT9201700444.
DeKosky, Robert K. (1973). "Spectroscopy and the Elements in the Late Nineteenth Century: The Work of Sir William Crookes". The British Journal for the History of Science. 6 (4): 400–423. doi:10.1017/S0007087400012553. JSTOR4025503. S2CID146534210.
DeKosky, Robert K. (1973). "Spectroscopy and the Elements in the Late Nineteenth Century: The Work of Sir William Crookes". The British Journal for the History of Science. 6 (4): 400–423. doi:10.1017/S0007087400012553. JSTOR4025503. S2CID146534210.
DeKosky, Robert K. (1973). "Spectroscopy and the Elements in the Late Nineteenth Century: The Work of Sir William Crookes". The British Journal for the History of Science. 6 (4): 400–423. doi:10.1017/S0007087400012553. JSTOR4025503. S2CID146534210.