"To-morrow? What for?"

"We're going to take the picture machine up in the airship, and
get some photos from the sky. I expect to make some films from
high in the air, as well as some in the regular way, on the
ground, and I want a little practice. Come around about two
o'clock, and we'll have a trial flight."

"All right. I will. But don't let my wife know I'm going up in
an airship again. She's read of so many accidents lately, that
she's nervous about having me take a trip."

"Oh, I won't tell," promised Tom with a laugh, and he worked
away harder than ever, for there were many little details to
perfect. The weather was now getting warm, as there was an early
spring, and it was pleasant out of doors.

The moving picture camera was gotten in readiness. Extra rolls
of films were on hand, and the big airship, in which they were to
go up, for their first test of taking pictures from high in the
air, had been wheeled out of the shed.

"Are you going up very far?" asked Mr. Nestor of Tom, and the
young inventor thought that Mary's father was a trifle nervous.
He had not made many flights, and then only a little way above
the ground, with Tom.

"Not very high," replied our hero. "You see I want to get
pictures that will be large, and if I'm too far away I can't do
it."