THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



[FIFTH SERIES.] 



FEBRUARY 1876. 



XIII. Experimental Proof that the Resistance to Galvanic 

 Conduction is dependent on the Motion of the Conductor. By 

 E. Edlund*. 



I. 



IN my memoir entitled "Theorie des Phenomenes Elec- 

 triques " f I have endeavoured to prove, in the theoretical 

 way, that the resistance to galvanic conduction must be pro- 

 portional to the intensity of the current. This conclusion from 

 theory contradicts the view, hitherto generally received, that 

 the resistance to conduction is independent of the current- 

 intensity. Nevertheless, on a closer investigation of the rela- 

 tions, we discover that the experiments which have been insti- 

 tuted do not by any means justify such an assumption ; for I 

 have shown, in the memoir just mentioned, that the various 

 methods hitherto employed for measuring the resistance leave 

 it in reality quite undecided whether the resistance is or is not 

 dependent on the intensity of the current %. I have therefore 

 instituted the following experiments for the purpose of solving 

 the question experimentally. 



If i signifies the current-intensity, a the cross section of the 

 conductor, 8 the mass of free aether in the unit of volume of 

 the conductor (which mass, when a galvanic current is in ques- 

 tion, may be regarded as invariable), and h the velocity of the 



* Translated from a separate impression, communicated by the Author, 

 from Poggendorff 's Annalen, vol. clvi. pp. 251-278. 



t K. Svenska Vetenskaps Akademiens Handlingar. Stockholm: Nor- 

 stedt et Soner. Leipzig : F. A. Brockhaus. 



% Op. cit. p. 25. 



Phil. Mag. S. 5. Vol. 1. No. % Feb. 1876. H 



