TABLE OF CONTENTS. 



i. 



THEORY OF IGNEOUS ROCKS AND VOLCANOES (1858). 



PAGE 



The chemistry of a cooling incandescent globe 1 



The primitive ocean and primitive crystalline rock .... 2 



Origin of eruptive rocks; views of Bunsen, Phillips, and Durocher . . 3 



Softening of crystalline stratified rocks 4 



Poulett Scrope and Scheerer on aqueo-igneous fusion .... 5 



Daubre'e and the author on the origin of mineral silicates ... 6 



Views as to the condition of the earth's interior 7 



Existence of a solid anhydrous nucleus maintained .... 7 



Intervention of sedimentary rocks in volcanic phenomena ... 8 



Origin of the volatile products of volcanoes 8 



Sir J. F. W. Herschel on the cause of volcanic action .... 9 



Its relation to recent sedimentary deposits ...... 9 



Note on the decomposition of crystalline rocks 10 



Note on the deposition of clays 10 



II. 

 ON SOME POINTS IN CHEMICAL GEOLOGY (1859). 



Ancient and modern sea-waters compared 11 



Origin and geological importance of alkaline carbonates . . . 12 



Different relations of potash and soda 12 



Deposits of iron-oxide as evidences of organic life .... 13 



Deposits of alumina; emery and bauxite; their origin .... 13 



Supposed aqueous origin of basic and acidic eruptive rocks . . 14 



Babbage and Herschel on the effects of internal heat .... 15 



Theory of volcanic and plutonic phenomena 15 



Note on the views of Keferstein 16 



Geological distribution of volcanoes 17 



III. 



THE CHEMISTRY OF METAMORPHIC ROCKS (1863). 



Preface; objections to the name of metamorphic rocks .... 18 



Probable relations between the age and constitution of crystalline rocks 19 



Sub-aerial and sub-aqueous decay of feldspars ...... 20 



