Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 568
en recently discovered or have recently come intoprominence. 481. Cathode Stream.—We have seen that when an electricdischarge takes place in a tube containing air at a pressure of lessthan a millimetre of mercury the appearance at the negativeterminal consists of a blue glow close to. the terminal,… … Fig. 369. of bluish light a (Fig. 369) can often be seen proceeding in straightlines normally from the surface itself. If the terminal is a smalldisc or a short thick electrode surrounded, except at its end, by aclosely fitting glass tube a nearly parallel beam is obtained; if,however, a concave…
Electricity · Magnetism
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