Ralph, the Train Dispatcher; Or, The Mystery of the Pay Car

  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 sendingand receiving--telling how small and large amateur sets can be made andoperated, and how some boys got a lot of fun and adventure out of whatthey did. Each volume from first to last is so thoroughly fascinating,so strictly up-to-date and accurate, we feel sure all lads will perusethem 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