PART III.--WONDERS OF THE SKY.

Chap. I. The Colour of the Sky 250

Chap. II. The Aurora Borealis 254

Chap. III. Parley tells of some other Meteors Parhelia or Mock Suns 263 Ignes Fatui 264 Experiment to show the cause 266

Chap. IV. Shooting Stars 267 What they are 269

Chap. V. Meteoric Stones, or Aerolites 273 How they are caused 277

Chap. VI. Bloody Rain 280 Red Snow 281 Showers of Frogs and Fish 282

Chap. VII. The Spectre of the Brocken 285

Chap. VIII. Some other instances of Aerial Reflection Souter Fell 291 What a Friend of Parley's saw 293 Dover Castle 293 What Humboldt saw 294 What Captain Scoresby saw 295 Apparent distance of Object 296

Chap. IX. Fata Morgana 299 The Mirage 299

Chap. X. How Parley supposes these appearances to be produced 303 Refraction 305 Reflection 311

Conclusion. Of some other Wonders, &c.

Section I. How we ought to think upon what we know 314 II. Ever Part of the Earth a Home for something 316 III. Birds of Passage, Dormice, and Snails 318 IV. The Rein-deer--the Camel 322 V. Benefit of the difference of Climate 324 VI. The same Organs in different Animals developed in various modes and degrees--the Acalepha, Actinia, and Sepia 326 VII. How the Stars and we are connected together-- Gravitation--Aerolites 330 VIII. Dew 332 IX. How every thing is endowed with a tendency to preserve its own life, and the existence of its race 334 X. The Bud of the Poppy--long retention of life by seeds and roots 336 XI. Of Seeds which are furnished with wings or sails 339 XII. Conclusion of the conclusion 340

List of Plates.

PLATE Page

I. EXTINCT ANIMALS THAT ONCE LIVED WHERE DORSETSHIRE NOW IS 5

II. EXTINCT ANIMALS THAT ONCE LIVED WHERE PARIS NOW IS 21

III. GREAT BONE CAVERN OF GAYLENREUTH 30

IV. GIGANTIC ELK AND MEGATHERIUM 38

V. VESUVIUS, WITH THE PINE-TREE CLOUD 64

VI. VESUVIUS IN ERUPTION AT NIGHT 66

VII. THE GEYSERS OF ICELAND 78

VIII. ISLAND OF STAFFA 93

IX. FINGAL'S CAVE 97

X. FORUM OF POMPEII 131

XI. GREAT FALL OF NIAGARA 135

XII. ESCAPE ON THE ICE 157

XIII. THE WATER-SPOUT 194

XIV. ACTINIÆ--CORAL BUILDERS 206

XV. SEPIAS 231

XVI. NAUTILUS 239

XVII. AURORA BOREALIS (FRONTISPIECE.)

XVIII. SPECTRE OF THE BROCKEN 285

XIX. DOVER CASTLE 293

XX. FATA MORGANA 299

WONDERS OF THE EARTH,

SEA, AND SKY.