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[Illustration: TOY]

            The gadget was strictly,
 beyond any question, a toy.
         Not a real, workable device.
                   Except for the way it could work
           under a man's mental skin....

               BY HARRY HARRISON

[Illustration: SHOP]


Because there were few adults in the crowd, and Colonel "Biff" Hawton
stood over six feet tall, he could see every detail of the
demonstration. The children--and most of the parents--gaped in wide-eyed
wonder. Biff Hawton was too sophisticated to be awed. He stayed on
because he wanted to find out what the trick was that made the gadget
work.

"It's all explained right here in your instruction book," the
demonstrator said, holding up a garishly printed booklet opened to a
four-color diagram. "You all know how magnets pick up things and I bet
you even know that the earth itself is one great big magnet--that's why
compasses always point north. Well ... the Atomic Wonder Space Wave
Tapper hangs onto those space waves. Invisibly all about us, and even
going right through us, are the magnetic waves of the earth. The Atomic
Wonder rides these waves just the way a ship rides the waves in the
ocean. Now watch...."

Every eye was on him as he put the gaudy model rocketship on top of the
table and stepped back. It was made of stamped metal and seemed as
incapable of flying as a can of ham--which it very much resembled.
Neither wings, propellors, nor jets broke through the painted surface.
It rested on three rubber wheels and coming out through the bottom was a
double strand of thin insulated wire. This white wire ran across the top
of the black table and terminated in a control box in the demonstrator's
hand. An indicator light, a switch and a knob appeared to be the only
controls.

"I turn on the Power Switch, sending a surge of current to the Wave
Receptors," he said. The switch clicked and the light blinked on and off
with a steady pulse. Then the man began to slowly turn the knob. "A
careful touch on the Wave Generator is necessary as we are dealing with
the powers of the whole world here...."

A concerted _ahhhh_ swept through the crowd as the Space Wave Tapper
shivered a bit, then rose slowly into the air. The demonstrator stepped
back and the toy rose higher and higher, bobbing gently on the invisible
waves of magnetic force that supported it. Ever so slowly the power was
reduced and it settled back to the table.

"Only $17.95," the young man said, putting a large price sign on the
table. "For the complete set of the Atomic Wonder, the Space Tapper
control box, battery and instruction book ..."

At the appearance of the price card the crowd broke up noisily and the
children rushed away towards the operating model trains. The
demonstrator's words were lost in their noisy passage, and after a
moment he sank into a gloomy silence. He put the control box down,
yawned and sat on the edge of the table. Colonel Hawton was the only one
left after the crowd had moved on.

"Could you tell me how this thing works?" the colonel asked, coming
forward. The demonstrator brightened up and picked up one of the toys.

"Well, if you will look here, sir...." He opened the hinged top. "You
will see the Space Wave coils at each end of the ship." With a pencil he
pointed out the odd shaped plastic forms about an inch in diameter that
had been wound--apparently at random--with a few turns of copper wire.
Except for these coils the interior of the model was empty. The coils
were wired together and other wires ran out through the hole in the
bottom of the control box. Biff Hawton turned a very quizzical eye on
the gadget and upon the demonstrator who completely ignored this sign of
disbelief.

"Inside the control box is the battery," the young man said, snapping it
open and pointing to an ordinary flashlight battery. "The current goes
through the Power Switch and Power Light to the Wave Generator ..."

"What you mean to say," Biff broke in, "is that the juice from this
fifteen cent battery goes through this cheap rheostat to those
meaningless coils in the model and absolutely nothing happens. Now tell
me what really flies the thing. If I'm going to drop eighteen bucks for
six-bits worth of tin, I want to know what I'm getting."

The demonstrator flushed. "I'm sorry, sir," he stammered. "I wasn't
trying to hide anything. Like any magic trick this one can't be really
demonstrated until it has been purchased." He leaned forward and
whispered confidentially. "I'll tell you what I'll do though. This
thing is way overpriced and hasn't been moving at all. The manager said
I could let them go at three dollars if I could find any takers. If you
want to buy it for that price...."

"Sold, my boy!" the colonel said, slamming three bills down on the
table. "I'll give that much for it no matter _how_ it works. The boys in
the shop will get a kick out of it," he tapped the winged rocket on his
chest. "Now _really_--what holds it up?"

The demonstrator looked around carefully, then pointed. "Strings!" he
said. "Or rather a black thread. It runs from the top of the model,
through a tiny loop in the ceiling, and back down to my hand--tied to
this ring on my finger. When I back up--the model rises. It's as simple
as that."

"All good illusions are simple," the colonel grunted, tracing the black
thread with his eye. "As long as there is plenty of flimflam to distract
the viewer."

"If you don't have a black table, a black cloth will do," the young man
said. "And the arch of a doorway is a good site, just see that the room
in back is dark."

"Wrap it up, my boy, I wasn't born yesterday. I'm an old hand at this
kind of thing."

       *       *       *       *       *

Biff Hawton sprang it at the next Thursday-night poker party. The gang
were all missile men and they cheered and jeered as he hammed up the
introduction.

"Let me copy the diagram, Biff, I could use some of those magnetic waves
in the new bird!"

"Those flashlight batteries are cheaper than lox, this is the thing of
the future!"

Only Teddy Kaner caught wise as the flight began. He was an amateur
magician and spotted the gimmick at once. He kept silent with
professional courtesy, and smiled ironically as the rest of the bunch
grew silent one by one. The colonel was a good showman and he had set
the scene well. He almost had them believing in the Space Wave Tapper
before he was through. When the model had landed and he had switched it
off he couldn't stop them from crowding around the table.

"A thread!" one of the engineers shouted, almost with relief, and they
all laughed along with him.

"Too bad," the head project physicist said, "I was hoping that a little
Space Wave Tapping could help us out. Let me try a flight with it."

"Teddy Kaner first," Biff announced. "He spotted it while you were all
watching the flashing lights, only he didn't say anything."

Kaner slipped the ring with the black thread over his finger and started
to step back.

"You have to turn the switch on first," Biff said.

"I know," Kaner smiled. "But that's part of illusion--the spiel and the
misdirection. I'm going to try this cold first, so I can get it moving
up and down smoothly, then go through it with the whole works."

[Illustration: ILLUSTRATED BY BREY]

He moved his hand back smoothly, in a professional manner that drew no
attention to it. The model lifted from the table--then crashed back
down.

"The thread broke," Kaner said.

"You jerked it, instead of pulling smoothly," Biff said and knotted the
broken thread. "Here let me show you how to do it."

The thread broke again when Biff tried it, which got a good laugh that
made his collar a little warm. Someone mentioned the poker game.

This was the only time that poker was mentioned or even remembered that
night. Because very soon after this they found that the thread would
lift the model only when the switch was on and two and a half volts
flowing through the joke coils. With the current turned off the model
was too heavy to lift. The thread broke every time.

       *       *       *       *       *

"I still think it's a screwy idea," the young man said. "One week
getting fallen arches, demonstrating those toy ships for every brat
within a thousand miles. Then selling the things for three bucks when
they must have cost at least a hundred dollars apiece to make."

"But you _did_ sell the ten of them to people who would be interested?"
the older man asked.

"I think so, I caught a few Air Force officers and a colonel in missiles
one day. Then there was one official I remembered from the Bureau of
Standards. Luckily he didn't recognize me. Then those two professors you
spotted from the university."

"Then the problem is out of our hands and into theirs. All we have to do
now is sit back and wait for results."

"_What_ results?! These people weren't interested when we were hammering
on their doors with the proof. We've patented the coils and can prove to
anyone that there is a reduction in weight around them when they are
operating...."

"But a small reduction. And we don't know what is causing it. No one can
be interested in a thing like that--a fractional weight decrease in a
clumsy model, certainly not enough to lift the weight of the generator.
No one wrapped up in massive fuel consumption, tons of lift and such is
going to have time to worry about a crackpot who thinks he has found a
minor slip in Newton's laws."

"You think they will now?" the young man asked, cracking his knuckles
impatiently.

"I _know_ they will. The tensile strength of that thread is correctly
adjusted to the weight of the model. The thread will break if you try to
lift the model with it. Yet you can lift the model--after a small
increment of its weight has been removed by the coils. This is going to
bug these men. Nobody is going to ask them to solve the problem or
concern themselves with it. But it will nag at them because they know
this effect can't possibly exist. They'll see at once that the
magnetic-wave theory is nonsense. Or perhaps true? We don't know. But
they will all be thinking about it and worrying about it. Someone is
going to experiment in his basement--just as a hobby of course--to find
the cause of the error. And he or someone else is going to find out what
makes those coils work, or maybe a way to improve them!"

"And we have the patents...."

"Correct. They will be doing the research that will take them out of the
massive-lift-propulsion business and into the field of pure space
flight."

"And in doing so they will be making us rich--whenever the time comes to
manufacture," the young man said cynically.

"We'll all be rich, son," the older man said, patting him on the
shoulder. "Believe me, you're not going to recognize this old world ten
years from now."




Transcriber's Note:

    This etext was produced from _Analog_ April 1962. Extensive research
    did not uncover any evidence that the U.S. copyright on this
    publication was renewed. Minor spelling and typographical errors
    have been corrected without note.