18 CONTENTS. 



CHAPTER IV. ATTEMPTS TO DISCOVER GENERAL LAWS IN 



GEOLOGY. 



PACK 



Sect. 1. General Geological Phenomena 537 



Sect. 2. Transition to Geological Dynamics 541 



GEOLOGICAL DYNAMICS. 



CHAPTER V. INORGANIC GEOLOGICAL DYNAMICS. 



Sect. 1. Necessity and Object of a Science of Geological Dynamics 542 



Sect. 2. Aqueous Causes of Change 545 



Sect. 3. Igneous Causes of Change. Motions of the Earth's Surface 549 



Sect. 4. The, Doctrine of Central Heat 554 



Sect. 5. Problems respecting Elevations and Crystalline Forces 556 



Sect. 6. Theories of Changes of Climate 559 



CHAPTER VI. PROGRESS OF THE GEOLOGICAL DYNAMICS 

 OF ORGANIZED BEINGS. 



Sect. 1. Objects of this Science 561 



Sect. 2. Geography of Plants and Animals 562 



Sect. 3. Questions of the Transmutation of Species 563 



Sect. 4. Hypothesis of Progressive Tendencies 565 



Sect. 5. Question of Creation as related to Science 568 



Sect. 6. The Hypothesis of the Regular Creation and Extinction of Species. 573 



1. Creation of Species 573 



2. Extinction of Species 576 



Sect. 1. The Imbedding of Organic Eemains 577 



PHYSICAL GEOLOGY. 



CHAPTER VII. PROGRESS OF PHYSICAL GEOLOGY. 



Sect. 1. Object and Distinctions of Physical Geology 579 



Sect. 2. Of Fanciful Geological Opinions 580 



Sect. 3. Of Premature Geological Theories 584 



CHAPTER VIII. THE TWO ANTAGONIST DOCTRINES OF 



GEOLOGY. 



Sect. 1. Of the Doctrine of Geological Catastrophes 586 



Sect. 2. " Uniformity 588 



