Penny Blood: Serial Sensation and Working-Class Entertainment — page 16: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

CONTENTS. xiii CHAPTER XX. SEQUENCE OF VOLCANIC BROOKS. Flow of matter melted off roots of mountains—Force causing tt constderable— Formation of lavas—These will differ in different areas and at different times—Law of Bunsen—Richthofen’s ‘‘ Natural System of Volcanic Rocks” —How explained by him—Dificulty arising—Captain Dutton’s explanation —Prof. Judd on Richthofen’s System—Melting of roots of the mountains affords an explanation of the requence— And . the variation ad volcante products in adjacent regions . e . ‘ . 249 CHAPTER XXII. GEOGRAPHICAL DISTRIBUTION OF VOLCANOS. The Linear arrangement of Volcanos accords with the doctrine of a thin crust and fluid substratum—Volcanic bands related to the boundaries of continents— Distinction between coastline and oceanic volcanoe—Darwin on coral islands— Platforms on which oceanic islands stand—their possible origin—Great vol- canic band of the Pacifie coast—Sinking and rising areas adjoining it~ It follows nearly a great circle of the sphere—and divides the land from the water-hemisphere—Is not equally active at every part—Suggested cause of local activity—Other possible causes of the same—Unknown cosmical causes have operated—Conclusion . . oe ‘ ‘ ; . 259 CHAPTER XXII. SUMMARY. [The Roman numerals refer to the Chapters.] I. On underground temperature—II. Condition of interior—ITI, Internal den: sities and pressures—IV. Lateral pressure, its amount—V, Elevations and depressions—VI. Elevations on the hypothesis of solidity—VI. Hypothesis of solidity fails—VIIl. Fluid substratum—IX. Crust not flezible—X. Dis- turbed tract—XI. The revelations of the plumbline—XII. The revelations of the thermometer—XIII, Amount of compression—XIV. Extravasation of water will not account for compression—XV. Compression and volcanic action—XVI. On Faulting—XVII. Geological movements explained — XVIII. Mr Mallet’s theory of volcanic energy—X1X. The volcano in eruption—XX. Sequence of volcanic rocks—XXI. Geographical distribution of volcanos. ; ; ; : ; , . : . . 267 COMIC OOOKS.EO