have said, the new ship
could travel swiftly without depending on the wing planes.

But as there is always a possibility of the gas bag being punctured,
or the vapor suddenly escaping from one cause or another, Tom did
not depend on this alone to keep his craft afloat. It was a perfect
aeroplane, and with the gas bag entirely empty could be sent
scudding along at any height desired. To enable it to rise by means
of the wings, however, it was necessary to start it in motion along
the ground, and for this purpose wheels were provided.

There was a large body or car to the craft, suspended from beneath
the gas bag, and in this car were the cabins, the living, sleeping
and eating apartments, the storerooms and the engine compartment.

This last was a marvel of skill, for it contained besides the gas
machine, and the motor for working the propellers, dynamos, gages,
and instruments for telling the speed and height, motors for doing
various pieces of work, levers, wheels, cogs, gears, tanks for
storing the lifting gas, and other features of interest.

There were several staterooms for the use of the young captain and
the passengers, an observation and steering tower, a living-room,
where they could all assemble as the ship was sailing through the
air, and a completely equipped kitchen.

This last was Mr. Damon's special pride, as he was a sort of cook,
and he liked nothing better than to get up a meal when the craft was
two or three miles high, and scudding along at seventy-five miles an
hour.

In addition there were to be taken along many scientific
instruments, weapons of defense and offense, in addition to the
electric rifle, and various other objects which will be spoken of in
due time.

"Well," remarked Tom Swift one afternoon, following a hard day's
work in the shop, "I think, if all goes well, and we have good
weather, I'll give the Black Hawk a trial tomorrow."

"Do you think it will fly?" asked Ned.

"There is no telling," was the answer of the young inventor. "These
things are more or less guesswork, even when you make two exactly
alike. As far as I can tell, we have now a better craft than the Red
Cloud was, but it remains to be seen how she will behave."

They worked late that night, putting the finishing touches on the
Black Hawk, and in the morning the new airship was wheeled out of
the shed, and placed on the level starting ground, ready for the
trial flight.

Only the bare machinery was in her,