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