XIV. MAKING IMPROVEMENTS
XV. THE AIRSHIP CLUE
XVI. SUCCESS
XVII. THE MYSTERIOUS MESSAGE
XVIII. ANOTHER CALL
XIX. THE BUZZING SOUND
XX. SETTING THE TRAP
XXI. THE PHOTO TELEPHONE
XXII. THE ESCAPE
XXIII. ON THE TRAIL
XXIV. THE LONELY HOUSE
XXV. THE AIRSHIP CAPTURE





TOM SWIFT AND HIS PHOTO TELEPHONE





CHAPTER I

A MAN ON THE ROOF


"Tom, I don't believe it can be done!"