xii CONTENTS OF THE THIRD VOLUME. 



GEOLOGICAL DYNAMICS. 

 CHAPTER V. INORGANIC GEOLOGICAL DYNAMICS. 



PAiJK 



Sect. 1. Necessity and Object of a Science of Geological 



Dynamics . ... 595 



Sect. 2. Aqueous Causes of Change .... 600 

 Sect. 3. Igneous Causes of Change. Motions of the Earth's 



Surface . .... 603 



Sect. 4. The Doctrine of Central Heat .... 608 

 Sect. 5. Problems respecting Elevations and Crystalline 



Forces . . 613 



Sect. 6. Theories of Changes of Climate . . 615 



CHAPTER VI. PROGRESS OF THE GEOLOGICAL DYNAMICS OF 

 ORGANIZED BEINGS. 



Sect. 1. Objects of this Science 619 



Sect. 2. Geography of Plants and Animals . . . 621 

 Sect. 3. Questions of the Transmutation of Species . . 623 

 Sect. 4. Hypothesis of Progressive Tendencies . . 627 

 Sect. 5. (Question of Creation as related to Science . .631 

 Sect. 6. The Hypothesis of the Regular Creation and Ex- 

 tinction of Species . . . 633 



1. Creation of Species ..... 639 



2. Extinction of Species .... 640 

 Sect. 7 The Imbedding of Organic Remains . . . 643 



PHYSICAL GEOLOGY. 

 CHAPTER VII. PROGRESS OF PHYSICAL GEOLOGY. 



Sect. 1. Object and Distinctions of Physical Geology . 645 

 Sect. 2. Of Fanciful Geological Opinions . . . 647 

 Sect. 3. Of Premature Geological Theories . . .654 



CHAPTER VIII. THE TWO ANTAGONIST DOCTRINES OF 

 GEOLOGY. 



Sect. 1 . Of the Doctrine of Geological Catastrophes . 658 

 Sect. 2. Uniformity . . 662 



