A Journey in Other Worlds
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electricities attract one another, and those charged with like
repel, no one thought of utilizing the counterpart of
gravitation? In the nineteenth century, savants and Indian
jugglers performed experiments with their disciples and masses of
inert matter, by causing them to remain without visible support
at some distance from the ground; and while many of these, of
course, were quacks, some were on the right track, though they
did not push their research."
President Bearwarden and Ayrault assented. They were steering
for an apparently hard part of the planet's surface, about a
degree and a half north of its equator.
"Since Jupiter's axis is almost at right angles to the plane of
its orbit," said the doctor, "being inclined only about one
degree and a half, instead of twenty-three and a half, as was the
earth's till nearly so recently, it will be possible for us to
have any climate we wish, from constantly warm at the equator to
constantly cool or cold as we approach the poles, without being
troubled by extremes of winter and summer."
Until the Callisto entered the planet's atmosphere, its five
moons appeared like silver shields against the black sky, but now
things were looking more terrestrial, and they began to feel at
Home. Bearwarden put down his note-book, and Ayrault returned a
photograph to his pocket, while all three gazed at their new
abode. Beneath them was a vast continent variegated by chains of
lakes and rivers stretching away in all directions except toward
the equator, where lay a placid ocean as far as their telescopes
could pierce. To the eastward were towering and massive
mountains, and along the southern border of the continent smoking
volcanoes, while toward the west they saw forests, gently rolling
plains, and table-lands that would have satisfied a poet or set
an agriculturist's heart at rest. "How I should like to mine
those hills for copper, or drain the swamps to the south!"
exclaimed Col. Bearwarden. "The Lake Superior mines and the
reclamation of the Florida Everglades would be nothing to this."
"Any inhabitants we may find here have so much land at their
disposal that they will not need to drain swamps on account of
pressure of population for some time," put in the doctor.
"I hope we may find some four-legged inhabitants," said Ayrault,
thinking of their explosive magazine rifles. "If Jupiter is
passing through its Jurassic or Mesozoic period, there must be
any amount of some kind of game." Just then a quiver shook the
Callisto, and glancing to the right they noticed one of the
volcanoes in violent eruption. Smoke filled the air in clouds,
hot stones and then floods of lava poured from the crater, while
even the walls of the hermetically sealed Callisto could not
arrest the thunderous crashes that made the interior of the car
resound.
"Had we not better move on?" said Bearwarden, and accordingly
they went toward the woods they had first seen. Finding a firm
strip of land between the forest and an arm of the sea, they
gently grounded the Callisto, and not being altogether sure how
the atmosphere of their new abode would suit terrestrial lungs,
or what its pressure to the square inch might be, they cautiously
opened a port-hole a crack, retaining their hold upon it with its
screw. Instantly there was a rush and a whistling sound as of
escaping steam, while in a few moments their barometer stood at
thirty-six inches, whereupon they closed the opening.
"I fancy," said Dr. Cortlandt, "we had better wait now till we
become accustomed to this pressure. I do not believe it will go
much higher, for the window made but little resistance when we
shut it."
Finding they were not inconvenienced by a pressure but little
greater than that of a deep coal-mine, they again opened the
port, whereupon their barometer showed a further rise to
forty-two, and then remained stationary. Finding also that the
chemical composition of the air suited them, and that they had no
difficulty in breathing, the pressure being the same as that
sustained by a diver in fourteen feet of water, they opened a
door and emerged. They knew fairly well what to expect, and were
not disturbed by their new conditions. Though they had
apparently gained a good deal in weight as a result of their
ethereal journey, this did not incommode them; for though
Jupiter's volume is thirteen hundred times that of the earth, on
account of its lesser specific gravity, it has but three hundred
times the mass--i. e., it would weigh but three hundred times as
much. Further, although a cubic foot of water or anything else
weighs 2.5 as much as on earth, objects near the equator, on
account of Jupiter's rapid rotation, weigh one fifth less than
they do at the poles, by reason of the centrifugal force.
Influenced by this fact, and also because they were 483,000,000
miles from the sun, instead of 92,000,000 as on earth, they had
steered for the northern limit of Jupiter's tropics. And, in
addition to this, they could easily apply the apergetic power in
any degree to themselves when beyond the limits of the Callisto,
and so be attracted to any extent, from twice
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