
"Everybody knows what inertia is. Newton's first law of motion is the law of
inertia, stating that every body remains in a state of rest or of uniform
motion in a straight line unless impressed forces change it. That's what makes
people in a moving car swerve to one side when the car goes round a bend. It's
what makes it so difficult for a horse to start a heavy load moving, though
once it's in motion the strain eases. There's nothing that doesn't obey the
law-nothing!
"But Newton didn't dream what measureless abysses of force lay behind his
simple statement. Or what an understatement it was. Describing inertia by
stating Newton's law is like describing the sea
by saying there's foam on the waves. The inertia force is inherent in
everything, just as there's moisture in everything. But behind that inertia,
manifest so obscurely in matter, is a vastness of power much greater
comparatively than the vastnesses of the seas which are the storehouses for
the relatively tiny amounts of moisture in everything you see.
"I can't make you understand; you don't speak the language. And I sometimes
wonder if I could explain even to another physicist all that I've discovered
in the past ten years. But I do very firmly believe that it would be possible
to anchor to that bedrock of essential, underlying inertia which is the base
upon which matter builds and-and allow time itself to whirl by!"
"Yeah, and find yourself floating in space when you let go." Eric grinned.
"Even I've heard that the universe is in motion through space. I don't know
about time, but I'm pretty sure space would block your little scheme."
"I didn't mean you'd have to-to dig your anchor right into the rock,"
explained Dow with dignity. "It'd be a sort of a drag to slow you down, not a
jerk that would snatch you right off the Earth. And it'd
involve-immensities-even then. But it could be done. It will be done. By
Heaven, I'll do it!"
Eric's sunburned face sobered.
"You're not kidding?" he asked. "A man could-coj~dd drag his anchor and let
time go by, and 'up-anchor' in another age? Say! Make me an anchor, and I'll
be your guinea pig!"
Dow did not smile.
"That's the worst of it," he said. "All this is pure theory and will have to
remain that, in spite of all I've bragged. It would be absolutely blind
experimenting, and the very nature of the element I'm experimenting with
precludes any proof of success or failure. I could-to be frank with you I
have-sent objects out through time--"
"You have!" Eric leaned forward with a jerk and laid an urgent hand on Dow's
arm. "You really have?"
"Well, I've made them vanish. I think it proves I've succeeded, but I have no
way of knowing. The chances are countless millions to one against my landing
an experiment in my own immediate future, with all the measureless vastness of
time lying open. And, of course, I can't guide it."
"Suppose you landed in your own past?" queried Eric.
Dow smiled.
"The eternal question," he said. "The inevitable objection to the very idea of
time travel. Well, you never did, did you? You know it
never happened! I think there must be some inflexible law which forbids the
same arrangement of matter, the pattern which is one's self, from occupying
the same space time more than once. As if any given section of space time were
a design in which any arrangement of atoms is possible, except that no pattern
may appear exactly twice.
"You see, we know of time only enough to be sure that it's far beyond any
human understanding. Though I think the past and the future may be visited,
which on the face of it seems to predicate an absolutely preordained future, a
fixed and unchangeable past-yet I do not believe that time is arbitrary. There
must be many possible futures. The one we enter upon is not the only way. Have
you ever heard that theory explained? It's not a new one-the idea that at
every point of our progress we confront crossroads, with a free choice as to