“Well I’ll be jiggered!” ejaculated Rawlins. “Must have just scraped bottom. Close shave though. Well, I guess you’re satisfied those salt rocks aren’t all they’re cracked up to be.”

As he ended Rawlins contemptuously flipped his finger nail against a crystal and almost bumped his head against the low ceiling as he leaped aside, for at the touch of his finger nail a high-pitched shriek seemed to issue from the crystals.

“Hurrah!” shouted Tom. “Hurrah! Now do you say they don’t work!”

“Oh, oh!” cried Frank between peals of laughter. “Oh, oh! That is one on you, Mr. Rawlins. That ‘struck a reef!’ Say, that wasn’t a reef, that was just the crystal you tossed on the table!”

Rawlins stood staring with gaping mouth and incredulous eyes.

“Sure it was!” repeated Frank. “See here!” Picking up the fragment of crystal he dropped it on the table top and again the rattling crash resounded through the room.

“Well!” cried Rawlins. “That beats anything I ever saw or heard by twenty miles.”

Half fearfully he reached forward and moved the crystal and a dull grating noise resulted. He tapped gently on the table and the blows resounded through the room like strokes of a sledge hammer.

“Beats the Dutch, don’t it!” exclaimed the operator. Then, taking out his watch he placed it on the table near the crystals and instantly steady beats like a hammer ringing on an anvil came from the crystals.

“Oh, here you are!” exclaimed Mr. Pauling who now entered the room. “What are you up to? Oh, I see—trying to show our Missouri friend! Well, how does it work?”