RECENT ADVANCES IN WIRELESS TELEGRAPHS 



By Chevalier G. Marconi. LL. D., D. Sc, M. R. I. 



The phenomena of electro-magnetic induction, revealed chiefly by 

 the memorable researches and discoveries of Faraday carried out in 

 the Royal Institution, have long since shown how it is possible for 

 the transrnission of electrical energy to take place across a small air 

 space between a conductor traversed by a variable current and 

 anothei- conductor placed near it. and how such transmission may be 

 detected and observed at distances greater or less, according to the 



Fig. 1. 



Fig. 2. 



more or less rapid variation of the current in one of the wires, and 

 also according to the greater or less quantity of electricity brought 

 into play. 



Maxwell, inspired by Faraday's work, gave to the world in 187-) 

 his wonderful mathematical theory of electricity and magnetism, 

 demonstrating on theoretical grounds the existence of electro-mag- 

 netic waves, fundamentally similar to but enormously longer than 



a Abstract of paper read before the Royal Institution of Great Britain at its 

 weekly evening meeting. Friday, March 3, 1905. Reprint of extract from trans- 

 actions of the Royal Institution. 



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