THE SPEEDWELL BOYS AND THEIR POWER LAUNCH
THE SPEEDWELL BOYS IN A SUBMARINE

CONTENTS

I. SHOT INTO THE AIR!

II. MARK HANGS ON
III. THIS FLIGHT OF THE "SNOWBIRD" IV. "WHO GOES THERE?"
V. BETWEEN TWO PERILS
VI. ON THE WINGS OF THE WIND
VII. DROPPED FROM THE SKY
VIII. PHINEAS ROEBACH, OIL HUNTER