Van Emmon!"
Smith also shook his head. "Neither of you has the right idea. The
easiest way, under the circumstances, would be an electrical one."
He paused, frowning hard; then vetoed his own plan. "Thunder; I'm
always speaking first and thinking afterward. I never used to do
it," accusingly, "until I got in with you folks. Anyhow, electricity
won't do; you've got to have practically pure elements for that,
too."
"Guess it's up to you, doc," said Billie. And they all looked
respectfully toward their host.
He laughed. "You three will never learn anything. You'll continue to
think that I'm a regular wonder about these things, but you never
notice that I merely stay still and let you commit yourselves first
before I say anything. All I have to do is select the one idea
remaining after you've disproved the rest. Nothing to it!"
He paused. "I'm afraid we're reduced to the spark method. It would
take too long to procure materials pure enough for any other plan.
Friction is out of the question for such people; they haven't the
patience.
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