Kaye, G. W. C. (George William Clarkson), 1880-1941 · London, New York [etc.] Longman's Green, and Co. · leaf 59
variousworkers, about 1897, constructed tubes of fluorescent glass(e.g. uranium and didymium glasses) with the idea of en-hancing the output of the tube ; it was, however, foundlater that the fluorescence was quite immaterial. Campbell-Swinton in 1896 modified Rontgens design oftube by inserting a… … Fig. 15.—Tube used by Crookes to display the heating effects of focussed cathode rays. The same year Professor H. Jackson of Kings College,London, turned to account a former discovery of Sir Wm.Crookes, and replaced the flat cathode by a concave one.Crookes had shown in 1874 that a hoUowed-out…
X-rays
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