HISTORY OF ELECTRICAL RESONANCE 



423 



During the next decade, as electrical engineering developed somewhat, 

 especially in alternating currents, we find more attention being paid to this 

 subject, both by physicists and engineers. Among those interesting thcm- 



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600 



DraMxmgm ui cni. 



y* ^» 



500 



1000 



Fig. 1 — The first electrical resonance curves published, by Hertz, 1887; showing the 

 greatest length of spark obtainable in his detecting loop for various lengths of wire in 

 the loop. 



selves in the matter may be mentioned such men as T. H. Blakesley, 

 Gisbert Kapp, J. A. l-ieming, R. T. Glazebrook, James Swinburne, Maurice 

 Hutin and Maurice Leblanc, Frederick Bedell and A. C. Crehore, Nikola 

 Tesla, M. I. Pupin, and John Stone Stone; some of these being concerned 

 with high frequencies, some with low. As indicating the general state of 



