INDEX 



Terrestrial types, influence of increas- Uniformitarian 

 ing cold on, 127 



vertebrates, eggs of, 126 



vertebrates, emergence of, 119, 122 



waters, as place of chordate origin, 

 119 



waters, as place of origin of lung- 

 breathers, 121 



Tertiary, climatic oscillation in, 135 

 Theriodonts, 128 

 Thermal springs, 56, 75 

 Theropoda, 130 

 Thinopus antiquus, 123, 124 

 Thorium, 42 

 Tidal disruption, forces of, 13, 14 



disruption, in ancestral sun, 16, 17 



disruption, mode of, in stars, 15 



force, of earth on moon, 30 



retardations, 28 



strains, in earth, 30 

 Tide-generating force, 16 

 Tides, body, 29 



in Archeozoic, 63 



loss of energy due to, 29 

 Tools, invention of, 174 

 Trachodons, 132 



Trees, growth of, as evidence of cli- 

 matic change, 185, 186 

 Triassic period, 46, 76, 79, 111 



period, climate of, 55 



Upper, 127, 129, 133, 145 

 Triton, 124, 125 



Troland, L. T., enzyme theory of, 103 

 Tropical climates, effect of, on man, 



149 



Tropics, contribution of, to civiliza- 

 tion, 182 

 Tunicates, 117 

 Turkestan, 185 

 Turkey, 185 

 Tyndall, J., 93 



Underbill, F. P., 84 

 Ungulates, 136 



2O7 



trend, of biologic 

 thought, 106 



United States, eastern, deaths in, 158, 

 159, 161, 164, 165, 168, 169, 170, 

 171 



northeastern, storms in, 166 

 southwestern, ruins in, 185 

 Weather Bureau, 184 

 Uranium, 42, 67, 69 

 Uranus, 4, 5, 6, 31 

 Utah, 152, 153, 154 



Indians of, 152 

 Ute Indians, 152, 153, 154 



Vadose water, 75 



Vegetation, dependence of, on climate, 



155 



Venus, 5, 28 



Vertebrates, distinguished from in- 

 vertebrates, 114 



egg of, change in, 126 



evolution of, 113 



first recorded, 144 



origin of, 111, 114, 144 



terrestrial, emergence of, 119, 122 

 Virgil, 89 

 Vitalism, 94 



Volcanic activity, as source of earth's 

 water, 56 



activity, times of, 74 



ashes, 75 



Volcanism, in Formative era, 48 

 Volcanoes, as source of carbon dioxide, 

 52 



Walcott, C. D., 69 



Warm blood, origin of, 111, 127, 145 



Wasps, 90 



Water, precipitation of, 100 



Water-vapor, 54, 98 



-vapor, as climate regulator, 52 

 -vapor, in primordial atmosphere, 

 34, 35, 38 



Waters, juvenile, 38, 75 



