[CHAPTER V.] CHESTER CHADWICK—INVENTOR
[CHAPTER VI.] THE RADIO TELEPHONE
[CHAPTER VII.]THE GREAT TEST
[CHAPTER VIII.] TALKING THROUGH SPACE
[CHAPTER IX.] THE BOYS FACE TROUBLE
[CHAPTER X.] AN INVOLUNTARY AËRONAUT
[CHAPTER XI.] BY THE ROADSIDE
[CHAPTER XII.] MAKING ENEMIES
[CHAPTER XIII.] THE LEADEN TUBE
[CHAPTER XIV.] IN THE HOSPITAL