  CHAPTER I. GEOLOGICAL REVOLUTIONS. CHAPTER III. SUBTERRANEAN HEAT. CHAPTER IV. SUBTERRANEAN UPHEAVALS AND DEPRESSIONS. CHAPTER V. SUBTERRANEAN WATERS AND ARTESIAN WELLS. CHAPTER VII. DESTRUCTION OF HERCULANEUM AND POMPEII. CHAPTER VIII. GAS SPRINGS AND MUD VOLCANOES. CHAPTER X. THE GREAT EARTHQUAKE OF LISBON. CHAPTER XII. ON CAVES IN GENERAL. CHAPTER XIV. SUBTERRANEAN LIFE. CHAPTER XV. CAVES AS PLACES OF REFUGE. CHAPTER XVI. HERMIT CAVES ROCK TEMPLES ROCK CHURCHES. CHAPTER XVII. ICE-CAVES AND WIND-HOLES. CHAPTER XVIII. ROCK TOMBS AND CATACOMBS. CHAPTER XIX. CAVES CONTAINING REMAINS OF EXTINCT ANIMALS. CHAPTER XX. SUBTERRANEAN RELICS OF PREHISTORIC MAN. CHAPTER XXI. TROGLODYTES OR CAVE-DWELLERS CANNIBAL CAVES. CHAPTER XXIII. ON MINES IN GENERAL. CHAPTER XXXIII. BITUMINOUS SUBSTANCES. CHAPTER XXXVII. MISCELLANEOUS MINERAL SUBSTANCES USED IN THE INDUSTRIAL ARTS. CHAPTER XXXVIII. CELEBRATED QUARRIES. CHAPTER XXXIX. PRECIOUS STONES. A complex full-page chart, ‘TABULAR GEOLOGICAL PROFILE’, appeared as p. 3, in mid-paragraph, and has been moved slightly forward. It is presented here as a single image. The link provided below the chart will direct the reader to a text rendition, found at the end of the text. There are also a number of large maps. Each one is represented in the text by reduced size version, with a [Larger view] link associated with it. This can be used to access a larger, more useful image. In general, the position of illustrations have been adjusted slightly, where necessary, to avoid falling in mid-paragraph. Minor errors in punctuation and formatting have been silently corrected. Please see the transcriber’s note at the end of this text for details regarding the handling of any textual issues encountered during its preparation. THE SUBTERRANEAN WORLD. LONDON: PRINTED BY SPOTTISWOODE AND CO., NEW-STREET SQUARE AND PARLIAMENT STREET CARBONIFEROUS FOREST, CARBONIFEROUS PERIOD. THE |
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