CONTENTS

CHAPTER PAGE

I The Beginning of a Mystery 9

II Johnny’s Trap Works 23

III Johnny Flushes a Skulker 36

IV A Fight in the Night 48

V A Strange Test 60

VI A Wild Race in the Night 72

VII A Race Across the Desert 90

VIII The Dust-Eating Mule 101

IX A Plane in a Typhoon 128

X The Taste of Salt Sea Water 142

XI Life’s Hazard of a Single Glide 154

XII Flying Knives 168

XIII The Mystery Deepens 182

XIV A Strange Life Boat 197

XV The Chests Are Found 213

XVI A Race in Mid-Air 225

WHITE FIRE

CHAPTER I
THE BEGINNING OF A MYSTERY

Johnny Thompson started, then stared withdilated pupils at a spot on the aluminum castingbefore him. The spot, a jagged notch left byimperfect work in the foundry, turned first adull red, then a bright red, then a glowing white.

Mechanically his hand touched the valve ofhis oxy-acetylene torch. Yes, it was as he hadbelieved, the acetylene valve was closed. Theoxygen valve was open, it was true, but thedrum which had contained oxygen under athousand pounds pressure was empty. In fact,he was waiting for the arrival of a new drum.That was what made the thing seem strange,impossible! It was a miracle, only miraclesdon’t happen in such places—he was workingin the heart of a great industrial plant whichturned out automobiles in twenty carload lotsand airplanes by the hundreds.

Johnny scratched his chin and stared at thewhite spot. True, the nozzle of his torch wasaimed at that spot; but five minutes before ithad sput-sputted for a few seconds, then dieddown to an insignificant flame giving too littleheat for any sort of welding. He had cut thatflame off, yet now, before his very eyes the metalglowed white hot.

With a grin which said plainer than words,“I’m dreaming,” he thrust a finger in a can ofwater, then held it

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