This "feed-back" regeneration enormously increased the loudness of the receiving signals, and its value to the boys was demonstrated one night when the air was unusually free of static and they clearly heard the signals from Nauen, Germany, and the Eiffel Tower, Paris. They looked at each other incredulously at first, and then as they heard the signals again too certainly to admit of doubt, they jumped to their feet, clapped each other on the shoulder, and fairly went wild with delight.
"The first boys in this old town to pick up a message from Europe!" cried Joe. "What next?"
"Or Mars," predicted Bob. "Who knows?" he added, as he saw the smile of doubt on his comrades' faces. "Marconi thought he might, and he's no dreamer. What is impossible to radio?"
Would you like to know what became of the good friends you have made in this book?
Would you like to read other stories continuing their adventures and experiences, or other books quite as entertaining by the same author?
On the _reverse side_ of the wrapper which comes with this book, you will find a wonderful list of stories which you can buy at the same store where you got this book.
Use it as a handy catalog of the books you want some day to have. But in case you do mislay it, write to the Publishers for a complete catalog.
Individual Colored Wrappers. Illustrated.
A new series for boys giving full details of radio work, both in sending and receiving--telling how small and large amateur sets can be made and operated, and how some boys got a lot of fun and adventure out of what they did. Each volume from first to last is so thoroughly fascinating, so strictly up-to-date and accurate, we feel sure all lads will peruse them with great delight.
Each volume has a Foreword by Jack Binns, the well-known radio expert.
THE RADIO BOYS' FIRST WIRELESS THE RADIO BOYS AT OCEAN POINT THE RADIO BOYS AT THE SENDING STATION THE RADIO BOYS AT MOUNTAIN PASS THE RADIO BOYS TRAILING A VOICE THE RADIO BOYS WITH THE FOREST RANGERS THE RADIO BOYS WITH THE ICEBERG PATROL THE RADIO BOYS WITH THE FLOOD FIGHTERS THE RADIO BOYS ON SIGNAL ISLAND THE RADIO BOYS IN GOLD VALLEY
Uniform Style of Binding. Individual Colored Wrappers. Every Volume Complete in Itself.