WIRELESS TELEGRAPHY 



He did not invent the delicate "coherer," which 

 first made wireless telegraphy possible. That was 

 done by Professor Edouard Branly, of the Catholic 

 University of Paris. 



He did not contrive the ingenious little tapper, or 

 "decoherer," which first suggested that ordinary 

 Morse letters could be registered with the Hertz 

 waves. The credit for that belongs to Sir Oliver 

 Lodge, now of Birmingham, to whom the name of 

 the " coherer" is also due. 



He was not the first to conceive the idea of 

 utilizing these waves for wireless telegraphy. That 

 seems to have come independently to several 

 minds. Professor Lodge was one of these; and 

 there was the young Hindoo professor, Jagadis 

 Chunder Bose, of Calcutta, who has made so pro- 

 found a study of the subject and contrived many 

 curious and startling experiments. 



He was not the first in the practical field. Mar- 

 coni, and Popoff, in Russia, seem to have begun al- 

 most at the same time, independently, of course. 

 Their two systems, simply a combining of all pre- 

 ceding work, are for the rest, in their main features 

 at least, identical. 



He did not originate the idea of "syntony"- 

 tuning two instruments to act in unison, like a pair 

 of tuning-forks which, if it can be attained, would 

 insure secrecy and make possible the receiving of 



