“Have you tested it yet?” inquired Raynor. “Up to 150 miles. It works splendidly. I’m going to gear up my hand-generator higher so as to produce a stronger alternating current, however. Then I think I’ll get better results.” Clang-g-g-g-g-g-g-g! A gong above Jack’s head sounded clamorously. This gong was another of the boy’s inventions. By means of a silicon detector ingeniously connected, a wireless wave striking the antenna of the Cambodian’s apparatus instantly sounded the gong. In this way Jack had done with a lot of tiresome waiting for calls with his receivers clamped to his head. “Something doing?” asked Raynor, as Jack sprang from the chair he had been sitting on and seated himself in front of the wireless key. “I guess it’s nothing much,” was the reply, “Siasconset maybe, or Race.” But a moment later the expression of the young operator’s face grew concentrated. His hand reached out for a pencil and he began to scribble on his transcription pad the words that came pulsing against his ears like waves out of a vast sea of space. CONTENTS “Steamer Athenia (Br.) reports,”—thus Jack wrote—“Along parallel of 45.06 saw ice as follows:—Grindstone, one mile of ice inshore. Scatari, close-packed ice inshore. Cape Ray, loose strings distant. Money Point, heavy close-packed ice inshore. Cape Race, several small strings loose ice drifting S. W.” Raynor had been peering oyer Jack’s shoulder as the boy wrote. When he ceased, the young engineer was full of eager questions. Jack flashed out an answer to the Athenia and then “grounded” his instrument. “Well, that’s to be expected in April,” was his comment. “I guess we’ll get a lot more of such reports before long.” “Think we’ll run into any bergs?” asked Raynor rather anxiously. “Don’t get nervous,” laughed Jack, “the iceberg patrol is on the lookout for those. I’m surprised they haven’t ‘tapped-in’ yet with some information. That’s the service for you, old man, the iceberg patrol. Think of the lives you have a chance to save and—and—but I’ve got to be off with this message to the old man.” Jack hurried from the cabin, and forwarded his message to Captain Briggs on the bridge. Raynor followed with more deliberation and made for his own