MESSAGES BY WIRELESS TELEGRAPH AND WIRELESS TELEPHONE. 



The upper figure shows an operator receiving a wireless message from across 

 the ocean. It will be seen that he actually receives the message with the aid of a 

 telephone. The lower figure represents the simple apparatus used in sending and 

 receiving messages by the wireless telephone. "Wireless" is in a sense a mis- 

 nomer in each case, since wires are necessarily used at sending and receiving stations. 

 Once under way, however, the messages are transmitted through the ether, inde- 

 pendently of any material substance. 



