CONTENTS.

PAGE.

INTRODUCTION

15

GENERAL SUMMARY

20

I

FLATTENING OF THE EARTH AT THE POLES

29

II

LENGTH OF POLAR NIGHTS

32

III

WORKING OF THE COMPASS

37

IV

AROUND THE CURVE

47

V

MYSTERIES OF THE POLAR REGIONS

52

VI

THE WATER-SKY; WHAT IT IS

54

VII

THE AURORA: ITS WONDERFUL VARIATIONS

65

VIII

METEORS OR VOLCANIC DISTURBANCES

109

IX

FINDING OF ROCK IN AND ON ICE

114

X

DUST IN THE ARCTIC

124

XI

OPEN WATER AT THE FARTHEST POINT NORTH AND SOUTH

128

XII

WHY IT IS WARMER NEAR THE POLES

175

p. 10

PAGE.

XIII

DRIFTWOOD--WHENCE IT CAME

196

XIV

HAVE OTHERS TITAN ESQUIMOS INHABITED THE ARCTIC REGIONS?

201

XV

WHAT PRODUCES COLORED SNOW IN THE ARCTIC?

209

XVI

WHERE AND HOW ARE ICEBERGS FORMED?

213

XVII

THE TIDAL WAVE

232

XVIII

CLOUDS, FOGS, AND VAPORS

250

XIX

ARCTIC AND ANTARCTIC WINDS

255

XX

THE CENTRE OF GRAVITY

269

XXI

CANNOT REACH THE POLES

272

XXII

WHAT IS TN THE INTERIOR OF THE EARTH?

275

IN CONCLUSION

282