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OF THE WIRELESS TELEGRAPH

One of the greatest fields for wireless telegraphy is on shipboard. Vessels in peril can "call" for help, or instructions can be sent to each vessel by the commanding officer of a fleet. This picture shows cadets in our navy taking instructions in wireless telegraphy.

Kites are used by the signal corps of our army to carry wires up into the air for receiving and sending messages.

This is an Italian battleship, as you can see from the flag. 1 he wires are strung for receiving and sending messages.

Telephone messages are also sent without wires. The system here illustrated was invented by Lee De Forest. The operator has the receivers clasped to both ears, just as in wireless telegraphy. De Forest is also the inventor of one of a number of wireless telegraph systems now in use.