“Curves and all,” smiled Jack.

“And how fast does this stuff—the electric waves, I mean—travel?” asked the young engineer.

“Well,” said Jack, “it is estimated that a message from this side of the Atlantic would reach the Irish coast in about one-nineteenth of a second.”

“Oh, get out! I’m not going to swallow that.”

“It is true, just the same,” said Jack. “I know it is hard to believe; lots of things about wireless are.”

“Well, I mean to learn all about it I can.”

“You’ll find it well worth your while.”

“I believe that it is the most fascinating thing I’ve ever tackled.”

“In the meantime, I wish I could raise a ship,” grumbled Jack, again sending out his call.

“If we were sinking or in urgent difficulties right now, would you stick on the job till we raised some rescue ship?”