ask of this age. We are entering the
Age of Speed. The railroads must solve the problem to compete with
motor-truck traffic and fast boats on the lakes and rivers of our land.

"You have, by your invention, shoved the clock of progress forward. I
am proud of you, my boy. I know now that, no matter what may happen to
me, you will make an enviable mark in the world of invention.

"You have done much before for the Government in time of stress. But
war engines of any kind are not worthy examples of inventive genius
beside such a thing as this.

"It is the inventions of peace, rather than those of war, that stand
for human progress."

Coming back over the mountain, Mary Nestor rode in the cab with Tom.
She sat on the swivel stool, in fact, and handled the controls for part
of the way. But she gave up the driver's place to Tom before they
reached the timber siding east of Cliff City.

"I cannot go by that place without a shudder," Mary said to the
inventor. "Ned and Mr. Damon told me all about that accident. Suppose
you had been killed, Tom!"

"I see I'll have to build an invention that will make that impossible,"
chuckled the young fellow.

"Make what impossible?"

"Some invention that will make it positively certain that no matter
what I do or where I go, nothing can harm me. Nothing else will suit
you, Mary, I plainly see."

"Well," returned the girl, smiling fondly at him. "I admit that would
satisfy me completely!"

This Isn't ALL!

Would you like to know what became of the good friends you have made in
this book?

Would you like to read other stories continuing their adventures and
experiences, or other books quite as entertaining by the same author?

On the reverse side of the wrapper which comes with this book, you will
find a wonderful list of stories which you can buy at the same store
where you got this book.

Don't throw away the Wrapper

Use it as a handy catalog of the books you want some day to have. But
in case you do mislay it, write to the Publishers for a complete
catalog.

THE TOM SWIFT SERIES

By VICTOR APPLETON

Uniform Style of Binding. Individual Colored Wrappers.
Every Volume Complete in Itself.
Every boy possesses some form of inventive genius. Tom Swift is a
bright, ingenious boy and his inventions and adventures make the most
interesting kind of reading.

TOM SWIFT AND HIS MOTOR CYCLE
TOM SWIFT AND HIS MOTOR BOAT
TOM SWIFT AND HIS AIRS