London: Macmillan and Co. and New York, 1893.
First Edition in English. Authortized translation by David Evans Jones, B.Sc. xv, [iii], 278, pp. 8vo. Publisher's blue cloth. almost fine PMM #377 (German Edition, 1892). Item #346792
PMM: " Experimental proof by Herz of the Farday-Maxwell hypothesis that electrical waves can be projected through space...By inducing the waves to produce an electrical spark at a distance, with no apparent connection between the oscillator and the spark gap, and by moving the sparking apparatus so that the length of the spark varied, Hertz proved beyond question the passage of electric waves through space. "
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