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CONTENTS, PART I. Preliminary remarks, ; 1-42 Objects of Geology stated, 1 Extent of our knowledge of the earth’s crust and composition of, 2 The records respecting geological events, and characteristics of the period prior to the creation of plants and animals, 3 Interpretation of geological phenomena 4 Oxygen a controlling element, 4 Reasoning from special structural affinities, 4 Action of water, 7 Changes of temperature, etc., together with the amount of rain, 7-8 Connection thereof with the amount of degradation,.: 9 Practical Considerations, 9 North American Continent well watered, 11 Areas of the Atlantic and Pacific Oceans, 11- Indentation of the coasts, protection of, * 12 Constructive action of water, 13 The Ocean’s bottom, 13 Position of animals, etc., upon, 13 Present mountains and valleys not in existence in the first periods, .... 14 Deep seas and high points of land uninhabitable, 26 Arenaceous deposits flanking our coast and West Indian Archipelago,.. 27 Mountain systems, or Systems of Relief, 28-29 River drainage and water shed, 29 River Systems, 32 Winds as the distributive agents of heat and moisture, 35