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