"Well, if he doesn't feel just like coming, don't argue him. He might
be nervous, and, while the ship is new, I don't want any nervous
passengers aboard. I can't give them my attention and look after the
running of the machinery."

"I was going to propose bringing a friend of mine over to see us make
the trip to-morrow," went on the young inventor. "Ned Newton, you know
him. He'd like a ride."

"Oh, I guess Ned's all right. Let him come along. We won't go very
high to-morrow. After a trial rise by means of the gas, I'm going to
lower the ship to the ground, and try for an elevation by means of the
planes. Oh, yes, bring your friend along."

Ned Newton was delighted the next day to receive Tom's invitation,
and, though a little dubious about trusting himself in an airship for
the first time, finally consented to go with his chum. He got a half
holiday from the bank, and, shortly after dinner went to Tom's house.

"Come on out in the shed and take a look at the Red Cloud," proposed
the young inventor. "Mr. Sharp isn't quite ready to start yet, and
I'll explain some things to you."

The big shed was deserted when the lads entered, and went to the loft
where they were on a level with the big, red aluminum tank. Tom began
with a description of the machinery, and Ned followed him with
interest.

"Now we'll go down into the car or cabin," continued the young