in
peak and lost city, with savages and reptiles; their ship of the air is
attacked by huge birds of the air; they survive explosion and
earthquake; they even live to tell the tale!

Any volume sent postpaid upon receipt of price.

HURST & COMPANY--Publishers--NEW YORK

-----------------------------------------------------------------------

DREADNOUGHT BOYS SERIES

Tales of the New Navy
By CAPT. WILBUR LAWTON
Author of "BOY AVIATORS SERIES."
Cloth Bound. Illustrated. Price, 50c. per vol., postpaid

THE DREADNOUGHT BOYS ON BATTLE PRACTICE.

Especially interesting and timely is this book which introduces the
reader with its heroes, Ned and Herc, to the great ships of modern
warfare and to the intimate life and surprising adventures of Uncle
Sam's sailors.

THE DREADNOUGHT BOYS ABOARD A DESTROYER.

In this story real dangers threaten and the boys' patriotism is tested
in a peculiar international tangle. The scene is laid on the South
American coast.

THE DREADNOUGHT BOYS ON A SUBMARINE.

To the inventive genius--trade-school boy or mechanic--this story has
special charm, perhaps, but to every reader its mystery and clever
action are fascinating.

THE DREADNOUGHT BOYS ON AERO SERVICE.

Among the volunteers accepted for Aero Service are Ned and Herc. Their
perilous adventures are not confined to the air, however, although they
make daring and notable flights in the name of the Government; nor are
they always able to fly beyond the reach of their old "enemies," who are
also airmen.

Any volume sent postpaid upon receipt of price.

HURST & COMPANY--Publishers--NEW YORK

-----------------------------------------------------------------------

FRANK ARMSTRONG SERIES

Twentieth Century Athletic Stories
By MATHEW M. COLTON.
Cloth Bound. Illustrated. Price, 60c. per vol., postpaid

FRANK ARMSTRONG'S VACATION.

How Frank's summer experience with his boy friends make him into a
sturdy young athlete through swimming, boating, and baseball contests,
and a tramp through the Everglades, is the subject of this splendid
story.

FRANK ARMSTRONG AT QUEENS.

We find among the jolly boys at Queen's School, Frank, the
student-athlete, Jimmy, the baseball enthusiast, and Lewis, the
unconsciously-funny youth who furnishes comedy for every page that bears
his name. Fall and winter sports between intensely rival school teams
are expertly described.

FRANK ARMSTRONG'S SECOND TERM.

The gymnasium,