excitement to the boy.

DON STURDY IN THE TOMBS OF GOLD;
Or, The Old Egyptian's Great Secret.

A fascinating tale of exploration and adventure in the Valley of
Kings in Egypt. Once the whole party became lost in the maze of
cavelike tombs far underground.

DON STURDY ACROSS THE NORTH POLE;
Or, Cast Away in the Land of Ice.

Don and his uncles joined an expedition bound by air across the north
pole. A great polar blizzard nearly wrecks the airship.

DON STURDY IN THE LAND OF VOLCANOES;
Or, The Trail of the Ten Thousand Smokes.

An absorbing tale of adventures among the volcanoes of Alaska in a
territory but recently explored. A story that will make Don dearer to
his readers than ever.

GROSSET & DUNLAP, PUBLISHERS, NEW YORK

THE RADIO BOYS SERIES

(Trademark Registered)

By ALLEN CHAPMAN

Author of the "Railroad Series," Etc.

Individual Colored Wrappers. Illustrated.

Every Volume Complete in Itself.

A new series for boys giving full details of radio work, both in
sending and receiving--telling how small and large amateur sets can
be made and operated, and how some boys got a lot of fun and
adventure out of what they did. Each volume from first to last is so
thoroughly fascinating, so strictly up-to-date and accurate, we feel
sure all lads will peruse them with great delight.

Each volume has a Foreword by Jack Binns, the well-known radio
expert.

THE RADIO BOYS' FIRST WIRELESS;
Or, Winning the Ferberton Prize.

THE RADIO BOYS AT OCEAN POINT;
Or, The Message That Saved the Ship.

THE RADIO BOYS AT THE SENDING STATION;
Or, Making Good in the Wireless Room.

THE RADIO BOYS AT MOUNTAIN PASS;
Or, The Midnight Call for Assistance.

THE RADIO BOYS TRAILING A VOICE;
Or, Solving a Wireless Mystery.

THE RADIO BOYS WITH THE FOREST RANGERS;
Or, The Great Fire on Spruce Mountain.

THE RADIO BOYS WITH THE ICEBERG PATROL;
Or, Making Safe the Ocean Lanes.

RADIO BOYS WITH THE FLOOD FIGHTERS;
Or, Saving the City in the Valley.

GROSSET & DUNLAP, PUBLISHERS, NEW YORK

THE RAILROAD SERIES

By ALLEN CHAPMAN

Author of the "Radio Boys," Etc.

Uniform Style of Binding. Illustrated.

Every Volume Complete in Itself.

In this line of books there is revealed the whole workings of a great
American railroad system. There are adventures in abundance--railroad
wrecks, dashes through forest fires, the pursuit of a "wildcat"
locomotive, the disappearance of a pay car