threatening the whole party with death and the flying machine itself
with destruction, at every jump.




CHAPTER II

MARK HANGS ON


Professor Henderson and his adopted sons--Jack Darrow and Mark
Sampson--had been in many perilous situations together. Neither one
nor the other was likely to display panic at the present juncture,
although the flying _Snowbird_ was playing a gigantic game of
"leap-frog" through the air.

The professor had himself constructed many wonderful machines for
transportation through the air, under the ground, and both on and
beneath the sea; and in them he and his young comrades had voyaged
afar.

Narrated in the first volume of this series, entitled, "Through the
Air to the North Pole," was the bringing together of the two boys and
the professor,--how the scientist and Washington White rescued Jack
and Mark after a train wreck, took them to the professor's workshop,
and made the lads his special care. In that workshop was built the
_Electric Monarch_, in which flying ship the party actually passed
over that point far beyond the Arctic Circle where the needle of the
compass indicates the North Pole.