116 INDEX 



D 



Decerebration 64 



Desiccation 47 



Digestion in poikilotherms 45 



Dinosaurs 10, 13, 14, 91 



Duckbill 30, 92 



E 



Earth 4 



temperature of 7 



Echidna ."0, 82, 92 



Embryology 52 



Endocrines 46, 51, 66 



Environment • 28, 52 



independence of 1, 89 



Enzymes 46, 94 



Eurythermal animals 26 



Evaporation 22, 60, 97 



Evolution of homoiotherms 10, 15, 91 



of seed plants 15 



P 



Feathers 11 



Fever 66 



Fitness of temperature constancy 89 



Foods 43, 52, 77, 89 



Frigid regions 98 



G 



Gases of primitive atmosphere 5 



Glands 51, 66 



Growth 69, 73, 75 



H 



Hair 13 



Heart beat, influence of temperature 21 



Heat centers 



in turtle 48 



in mammals 54, 63 



Heat production 2, 56 



