CONTENTS. ix 



CHAPTER VII. 



EXAMINATION OF MR. ALFRED R. WALLACE'S MODIFICATION OF 

 THE PHYSICAL THEORY OF SECULAR CHANGES OF CLIMATE. 

 — Continued. 



PAGE 



Physics in relation to Mr. Wallace's Modification of the Theory. 

 — Another Impossible Condition Assumed. — A Geographical 

 Change not Necessary in Order to Remove the Antarctic 

 Ice. — Other Causes than Antarctic Ice affecting the North- 

 ward-flowing Currents. — Climatic Conditions of the Two 

 Hemispheres the reverse Ten Thousand Years ago ; argu- 

 ment from. — Mutual Reactions of the Physical Agents in 

 Relation to the Melting of the Ice. — Another Reason why 

 the Ice does not Melt 100 



CHAPTER VIII. 



EXAMINATION OF MR. ALFRED R. WALLACE'S MODIFICATION OF 

 THE PHYSICAL THEORY OF SECULAR CHANGES OF CLIMATE. 

 — Continued. 



Professor J. Geikie on Condition of Europe during Interglacial 

 Periods. — Scotland during Interglacial Periods. — Difficulty 

 in Detecting the Climatic Character of the Earlier Inter- 

 glacial Periods. — Objection as to the Number of Interglacial 

 Periods. — Objection as to the Number of Submergences. — 

 Interglacial Periods less strongly marked in Temperate 

 Regions than Glacial, 126 



CHAPTER IX. 



THE PHYSICAL CAUSE OF MILD POLAR CLIMATES. 



The Probably True Explanation. — Sir William Thomson on Mild 

 Arctic Climates. — Mr. Alfred R. Wallace on Mild Arctic 

 Climates. — Influence of Eccentricity during the Tertiary 

 Period, 143 



