[Illustration: Each clasped the gas-gun ready for instant use.] The Boy Inventor’s Wireless Triumph By RICHARD BONNER WITH ILLUSTRATIONS BY CHARLES L. WRENN M. A. DONOHUE & COMPANY CHICAGO NEW YORK Copyright 1929 by M. A. Donohue & Company Made in the U. S. A. TABLE OF CONTENTS CHAPTER I—THE WIRELESS AT LONE ISLAND CHAPTER II—THE MYSTERIOUS X. Y. Z. CHAPTER III—THE CIPHER CODE CHAPTER IV—A MARINE GAME OF BLIND-MAN’S BUFF CHAPTER V—A SHOT IN THE NIGHT CHAPTER VI—NED BANGS’ STORY CHAPTER VII—THE THREE COLORED GEMS CHAPTER VIII—ON BOARD “THE TARANTULA” CHAPTER IX—THE CHADWICK GAS GUNS CHAPTER X—DRAWING A RASCAL’S FANGS CHAPTER XI—THE “FLYING ROAD RACER” CHAPTER XII—HERRERA IS NOT CAUGHT NAPPING CHAPTER XIII—A DARING PLAN CHAPTER XIV—A MESSAGE FROM THE AIR CHAPTER XV—A DASH ALOFT CHAPTER XVI—INTO THE ENEMY’S CAMP CHAPTER XVII—“DAD!—IT’S JACK!” CHAPTER XVIII—HEMMED IN BY FLAMES CHAPTER XIX—“STAND BY FOR A ROPE!” CHAPTER XX—A RESCUE BY AIRSHIP CHAPTER XXI—ALOFT IN THE STORM CHAPTER XXII—A VOYAGE OF TERROR CHAPTER XXIII—THE BOY INVENTORS SOLVE A PROBLEM CHAPTER XXIV—AN APPEAL FOR HELP CHAPTER XXV—“IT’S DEATH TO REMAIN HERE!” CHAPTER XXVI—AN ASTOUNDING DISCOVERY The Boy Inventor’s Wireless Triumph CHAPTER I—THE WIRELESS AT LONE ISLAND The book Jack Chadwick had been reading,—a volume dealing with some rather dry experimental work,—slipped from his fingers and fell with a crash on the floor of the veranda. At the sudden interruption to the sleepy, breathless calm of Lone Island on a July noon, his cousin Tom Jesson, sixteen, and more than a year Jack’s junior, looked up from the steamer chair in which he, too, was extended, with one of his quiet smiles. Suspending his task of wrapping some new condenser plates with glittering tin-foil, he gazed about him. In front of the bungalow was a strip of dazzling white sand,—the beach. Beyond shimmered the cobalt-blue waters of the Gulf of Mexico. At a small wharf lay a capable-looking motor cruiser, painted white and about forty-five feet in length. She had been moored thus for the past seven days—ever since Jack and his cousin and their colored attendant, Jupe, had landed on the island after an uneventful passage from Galveston.