es; its progress
soon became faster and faster. Phil was about to follow it and give it
another push, when Ione drew him back.

Suddenly they experienced a sinking sensation and a fearful vertigo.
The snapping animals faded. Ahead of them was the forest of vines, and
they saw the safe hurled into it, crashing, plunging into the tangled
mass. The whole view crumpled and moved upwards like a swirl of leaves
in a wind, and then vanished with a snap.

* * * * *

They were sick and dizzy, but tremendously curious to see everything.
The water, the cubistic cliffs, the vast space full of balls, all
curiously blurred, appeared in succession. There were blank spaces and
then blurred sights of things which they did not recognize, never
having seen them before. Then the dizziness and the nausea abated, and
ahead of them was a vast yellow blue, a huge nebula, and in it were
double-colored suns and ringed planets with swarms of moons; this
glorious sight remained for many seconds, as they gazed at it in
panting astonishment, half reclining on the concrete; and then it
faded. Again the nausea came on; again the succession of blurred
views. Eventually the myriad spheres, the water with the leviathans,
the forest of vines, each succeeding scene grew more blurred. Their
nausea was correspondingly increased, till they were forced to lie
down on the ground from illness.

When their giddiness abated, there were blurring views again. There
was an impression as though the speed of a train were decreasing as
one looks out of the window. And how one view held for several
seconds, a vast and wild mountain-range with glaciers and snow peaks
by moonlight. When this faded gradually, the scenes began to flick by,
more and more rapidly, and grew blurred. Phil and Ione were attacked
by nausea until, again, they had to lie down. After that came the
familiar succession: the wooden animals, the tangle of vines, the vast
sea, the spheres, and more blurred scenes. Then came a pause, with
the nebula and the glorious suns swinging into view once again.

"Oh, I understand!" Ione exclaimed; "We're swinging. The safe was so
heavy that we swung too violently, too far, and back again--"

"And we keep going till it knocks us out, or till the old cat dies,"
added Phil.

* * * * *

However, they found that after a number of repetitions of the same
program, their giddiness was becoming less; and