1908.] Transatlantic Wireless Telegraphy. 107 



WEEKLY EVENING MEETING, 



Friday, March 13, I'JOS. 



Sir William Crookes, D.Sc. F.R.S., Honorary Secretary and 

 y ice-President, in the Chair. 



CoMMENDATORE G. Marcoxi, LL.D. D.Sc. M.R.I, 



Transatlantic Wireless Telegraphy. 



Before I go into my subject, it mi.s^ht interest you to know that the 

 invitation from the Royal Institution to dehver this lecture was 

 sent to me by transatlantic wireless telegraphy on October 19, when 

 I was in Canada. 



The following is the text of the message : — 



" Marcoiti, Glace Bay. 



" Hearty congratulations on behalf of Royal Institution, the home 

 of Faraday. We invite you to give first Friday evening discourse on 

 January 17 next. Please reply by wireless. 



" Sir William Crookes, 



" Royal Institution, London." 



To which I replied, also by wireless : — 



" By means of ether waves across Atlantic I thank you for honour 

 invitation to lecture at Royal Institution. Owing uncertainty my 

 future plans greatly obliged if you will permit me postpone acceptance 

 until I return to London. 



" Marconi." 



I have had the honour on previous occasions of describing before 

 this Institution some of the stages through which the application of 

 electric waves to telegraphy through space has passed. This evening 

 I propose to confine myself chiefly to describing the results and 

 observations recorded during the numerous tests and experiments 

 which I and my collaborators have been carrying out with the object 

 of proving that wireless telegraphy across the Atlantic was possible, not 

 merely as an experimental feat, but as a new and practical means for 

 commercial communication.* 



* Journ. Inst. Elec. Eng., xxviii. 1899, p. 291. 



