CONTENTS 



CHAPTER PAGE 



I. Introduction 1 



II. The Temperature of the Earth in Time and Space.. . 4 



III. Ancestry of Homoiothermic Animals 10 



IV. Responses of Poikilotherms to Variations in Tempera- 



ture 17 



V. Responses of Homoiotherms to Variations in Tempera- 

 ture 30 



VI. Factors Influencing Rate of Metabolism 37 



VII. Factors Influencing Body Temperature 50 



VIII. The Mechanisms of Temperature Regulation in 



Homoiotherms 66 



IX. Growth and Longevity 69 



X. Periodic Fluctuations in Body Temperature 79 



XI. Behavior and Body Temperature 84 



XII. Fitness of Temperature Constancy 89 



XIII. Man as a Homoiothermic Animal 96 



Bibliography 101 



Index 116 



