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 260
tration is given in Fig. 107, which is drawrof one eighth of the actual size of the spark obtainedfrom a Cuthbertsons electrical machine. The discharge,from a Leyden jar affords a much brighter, shorter,noisier spark than the spark drawn direct from thecollector of a machine. The length (see Art… … Fig, 107. of electricity discharged. The colour of the spark varieswith the nature of the metal surfaces between whichthe discharge takes place. Between, copper or silverterminals the spark takes a green tint, while betweeniron knobs, it is of a reddish hue. Examination withthe spectroscope reveals…
Electricity · Magnetism
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