1908.] on Transatlantic Wireless Telegraphy. 119 



message from President Roosevelt was transmitted from that station 

 to His Majesty the King in London. 



It is curious to note in regard to the transmission of this message 

 that the energy employed at Cape Cod was barely 10 kilowatts ; and 

 it was not anticipated that this amount of energy would be suflQcient 

 to carry direct to Poldhu. The message was therefore transmitted 

 from Cape Cod, instructions having been given to the operators at 

 Glace Bay to be on the look-out, and to repeat wirelessly on to Poldhu 

 any message received from Cape Cod, and my assistant, Mr. P. J. 

 Woodward, at Poldhu, took in the message on one of my magnetic 

 detectors.* The electro-magnetic waves conveying this message 

 travelled therefore 3000 miles, through space over the Atlantic, which 

 distance included about 500 miles of land, following an arc of 

 45 degrees on a great circle. 



In the spring of 1903 the transmission of news messages from 

 America to the London Times was attempted, in order to demonstrate 

 that messages could be sent from America by means of the new 

 method, and for a time these messages were correctly received and 

 published in that newspaper. 



By reference to the files of the Times I find that 267 words of 

 news, transmitted across the Atlantic by wireless, were published in 

 the London Times during the latter part of March and the early part 

 of April of that year. 



A breakdown in the insulation of the apparatus at Glace Bay 

 made it necessary, however, to suspend the service, and unfortunately 

 further accidents made the transmission of messages uncertain and 

 unreliable. 



In consequence of this it was decided not to attempt for the time 

 being the transmission of any more public messages until such time 

 as a reliable service could be maintained in both directions under all 

 ordinary conditions. 



As I found that many improvements evolved during the course 

 of the numerous tests and experiments could not be readily applied 

 to the plants at Poldhu and Cape Breton, it was decided to erect a 

 completely new long-distance station in Ireland, Jind to transport the 

 one at Glace Bay to a diiferent site in the vicinity, where sufficient 

 land was available for experimenting with aerials of much larger 

 dimensions than had been hitherto employed. 



Experiments were, however, continued with Poldhu, and in 

 October 1903 it became possible to supply the -Cunard Steams ip 

 Lucania during her entire crossing from New York to Liverpool 

 with news transmitted direct from the shore. 



In November of the same year, tests, similar to those carried out 



♦ Proceedings Royal Society, Ixx. p. 341, ' Note on a Magnetic Detector of 

 Electric Waves which can be employed as a Receiver for Space Telegraphy.' 



