We are not slaves to the demons of the Weather, now--not as we once were. The United States Weather Bureau, day by day, draws closer and closer the chains which bind the untrammeled violence of sun and storm. High, high in the atmosphere, is a world all unexplored, where no man can dwell; where, as yet, no human-made instrument has reached. This unknown world calls for explorers, it calls for adventure, it calls for daring and patient work. It is for Man to tame the forces of the sky, and tame them he must and will. To show how much the Weather Bureau is accomplishing, to depict the marvels of its work, to portray the ruthless ferocity of the forces as yet uncontrolled and to reveal the gripping fascination of this work, in which every American boy may join, is the aim and purpose of THE AUTHOR. CONTENTS CHAPTER I PAGE ADRIFT ON THE FLOODED RIVER 1 CHAPTER II THE HOME OF THE RAIN 34 CHAPTER III PUTTING THE SUN TO WORK 72 CHAPTER IV THE MASSACRE OF AN ARMY 105 CHAPTER V THE RUNAWAY KITE 143 CHAPTER VI DEFEATING THE FROST 180 CHAPTER VII CLEARING AN INNOCENT MAN 210 CHAPTER VIII IN THE WHIRL OF A TORNADO 255 CHAPTER IX THE TRAIL OF THE HURRICANE 280 CHAPTER X STRUCK BY LIGHTNING 312 ILLUSTRATIONS