Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 443
ds w METHODS OF ILLUMINATION 423 of the tubes with tin-foil, which is put in connection with thesecondary poles of the induction coil. It is not, I think,advisable to employ electrodeless tubes unless circumstancesrender it necessary, for although they are easier to make theyare not so easy to… … Fig. 154. The following directions may be given for the making of avacuum tube. The most important part of a vacuum tube is theelectrode. Unless this is properly made it may, and generallydoes, become a never-ending source of trouble; it breaks topieces, melts up, and then often cracks the tube.…
Spectrum analysis
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