- 1Chapter I — The Power of the Air
- 2Chapter II — An Encounter With a “Character”
- 3Chapter III — The Professor’s Dilemma
- 4Chapter IV — “Where Is He?”
- 5Chapter V — Chester Chadwick — Inventor
- 6Chapter VI — The Radio Telephone
- 7Chapter VII — The Great Test
- 8Chapter VIII — Talking Through Space
- 9Chapter IX — The Boys Face Trouble
- 10Chapter X — An Involuntary Aëronaut
- 11Chapter XI — By the Roadside
- 12Chapter XII — Making Enemies
- 13Chapter XIII — The Leaden Tube
- 14Chapter XIV — In the Hospital
- 15Chapter XV — A Tale of the Colorado
- 16Chapter XVI — Zeb Cummings
- 17Chapter XVII — In the Laboratory
- 18Chapter XVIII — Into the Storm
- 19Chapter XIX — The “Lightning Cage”
- 20Chapter XX — Through the Air
- 21Chapter XXI — Vaulting to the Rescue
- 22Chapter XXII — “Z.2.x”
- 23Chapter XXIII — On the Border Line
- 24Chapter XXIV — “The Three Buttes”
- 25Chapter XXV — Into the Beyond
- 26Chapter XXVI — The Start for the Unknown
- 27Chapter XXVII — The Professor’s Second Dilemma
- 28Chapter XXVIII — The Upper Regions
- 29Chapter XXIX — A Mud Bath
- 30Chapter XXX — Night on the Colorado
- 31Chapter XXXI — The Island of Mystery
- 32Chapter XXXII — Through the Woods
- 33Chapter XXXIII — The Secret at Last
- 34Chapter XXXIV — The Interlopers
- 35Chapter XXXV — Triumph
- 36Chapter XXXVI — The Homecoming
The Boy Inventors’ Radio Telephone
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