Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 79
. These breaks may be ar-ranged so as to represent a flower, star,arch, word or other de-sign. The sparks arereally successive, butthey seem to be simul-taneous. Experiment 68.— The *luminous globe is represented in Fig.173 and the luminoustube in Fig. 174. Thefirst of these consistsof a hollow… … Fig. 174. FRICTIONAL ELECTRICITY, 349 worked, bright sparks appear at each break between the discs. Theconstruction and action of the luminous tube are similar. All ofthese luminous effects are best exhibited in the dark. Experiment 69.—If two barometertubes, united at the top, be filled…
Electricity · Magnetism
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