36 



Chevalier G. Marconi 



[March 3, 



messages to any one of them without the signals being picked up by 

 the other stations for which they are not intended. It is obvious 

 that the greater the difference in periods of the oscillation or tune 

 between two stations, the smaller will be the possibility of tapping 

 and mutual interference. 



It is also possible to connect to one sending wire, through the 



pfip — )h-^T^^ 



j ^TOQT^ 1 I "TJS^T 1 



Fig. 9. 



connections of different inductances, several differently tuned trans- 

 mitters, and to a receiving wire a number of corresponding receivers, 

 as is shown in Figs. 9 and 10. 



It was possible, nearly five years ago, to send different messages 

 simultaneously without interference, the messages being received on 

 differently tuned receivers connected to the same vertical conductor. 



Fig. 10. 



This result was described in the Times of October 4, 1900, by 

 Professor Fleming, who, in company with others, witnessed the test. 



A recent improvement introduced in the method of tuning the 

 receiver is that shown in Fig. 11. 



There exists at present among a large section of the public con- 

 Biderable misconception as to the feasibility of tuning or syntonising 



