gain crowded around, asking that the trick be repeated.
Tom did it, with the same result.

None of the giants could move the iron, yet Tom had no difficulty in
doing so. Of course my readers have already guessed how the trick
was done. It was worked by a strong magnet, hidden in the floor. At
a signal from Tom, Ned would switch on the current. The iron would
be held fast and immovable, but when Tom himself went to raise it
Ned would cut off the electricity and the bar was lifted as easily
as an ordinary piece of iron. But simple as the trick was, it
impressed the giants. Then Tom did some other stunts for them,
simple experiments in physics, that every High School lad has done
in class.

"I want to get these guards friendly with me," he explained. "In
time the news will reach the king and he'll be so curious that he'll
come here and then--well, we'll see what will happen."

But this did not take place as soon as Tom desired. In fact, the
giants were very slow to act. The guards did get quite friendly, and
every day they wanted the same two first tricks performed over
again. Tom did them many times, wondering when the king would come.

Then he played a bold game, and made open inquiries about a white
man, one like the king's captives, who might have come to giant land
about a year previous.

"Is there a lone white captive here?" asked Tom.

The giant guard to whom he directed his question gave a start, for
Tom could now speak the language fairly well, and, after the first
indication of surprise, the guard muttered something to his
companions. There was a startled ejaculation, a curious glance at
the captives, and then--silence. The guards filed silently away,
and, a little later, could be seen going in the king's big hut.

"By Jove, Tom!" cried Ned. "You touched 'em that time. There's
something up, as sure as you're born!"

"I believe so myself," agreed the young inventor. "And now to throw
a real scare into these giants," he added, as he went to a distant
room of the hut where he had hidden some of the things he had taken
from his "box of tricks," as Ned dubbed it.

"Bless my necktie!" cried Mr. Damon. "What's up now, Tom."

"I'm going to show these giants that they'd better make friends with
us soon, or we may blow their whole town sky-high!" cried Tom. "I'm
going to use some of the blasting powder--just a pinch, so to speak--and
knock an empty hut into slivers. I think that will impress these
fellows. If