Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 396
the ends of the primary coil.Many other forms of commutator have been devised ;one, much used as a key for telegraphic signalling, isdra\yn in Fig. i 59. 400. Luminous Bflfects of Induction Sparks.—The induction coil furnishes a rapid succession of sparkswith which all the effects of disruptive… … Fig. 149. For studying discharge through glass vessels and tubesfrom which the air has been partially exhausted, thecoil is very useful Fig. 150 illustrates one of themany beautiful effects which can be obtained, the sparkexpanding in the rarefied gas into flickering sheets oflight, exhibiting…
Electricity · Magnetism
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