terrific a volume of superheated steam that, in connection with
our wind turbines, we shall have no difficulty in raising half a
cubic mile of water a minute to our enclosure, which is but
little above sea-level, and into which, till the pressure
increases, we can fan or blow the water, so that it can be full
three weeks after our longest day, or, since the present
unimproved arrangement gives the indigenes but one day and night
a year, I will add the 21st day of December.

"'We shall be able to find use for much of the potential energy
of the water in the reservoir when we allow it to escape in June,
in melting some of the accumulated polar ice-cap, thereby
decreasing still further the weight of this pole, in lighting and
warming ourselves until we get the sun's light and heat, in
extending the excavations, and in charging the storage batteries
of the ships at this end of the line. Everything will be ready
when you signal "Raise water."'"

"Let me add parenthetically," said Bearwarden, "that this means
of obtaining power by steam boilers sunk to a great depth is much
to be commended; for, though the amount of heat we can withdraw
is too small to have much effect, the farther towards the centre
our globe can be cooled the deeper will the water of the oceans
be able to penetrate--since it is its conversion into steam that
prevents the water from working its way in farther--and the more
dry land we shall have."

"You see," the president continued, "the storage capacity at the
south pole is not quite as great as at the north, because it is
more difficult to excavate a basin than to close the exits of one