286 



INDEX 



Sweden, seasonal variations in death 

 rate, 71 



Taxation, relation to climate, 201 f. 

 Taylor, Griffith, cited, 254. 

 Temperance, and health, 33, 35 

 Temperature, and comfort, 268 fF. ; 



effect of changes in, 88 ff. ; 



effect of crossing-over, 155 f . ; 



effect on deaths, 59; 



effect on mice, 159 ff. ; 



of four largest cities, 235 f . ; 



optima for various species, 156 f . ; 



optimum for crinoids, 162; 



optimum of, 70 ff. ; 



relation to deaths, 67 ff. ; 



relation to mutations, 150 ff. ; 



sensible, 266 

 Terman, L. M., cited, 20 

 Tertiary, mammals in, 257 f. 

 Time, measurement of geological, 



256 ff. 

 Tokio, deaths in, 249 

 Tolstoi, cited, 233 

 Tower, W. E., cited, 152 

 Training, and civilization, 19 

 Trajan, 204 

 Trees, as a climatic measure, 187 ff.; 



growth, as a climatic measure, 131 

 Triassic Period, mammals in. 111 

 Tuberculosis, deathrate from, 60; 



effect of food on, 135 

 Tucson, experiments at, 152 

 Turkey, care of health in, 225 f . ; 



economic restoration of, 224 ff . ; 



the problem of, 208 ff. 

 Turkish Empire, causes of weakness, 



214 ff. 



Turks, character of, 208 ff., 219; 

 relation to Kurds and Arabs, 213 f., 



215 f. 



Tyler, W. F., cited, 268 f. 

 Typhoid fever, deaths from, 58 



United States, climatic advantages of, 



145; 

 climograph of, 70 ff. ; 

 deaths in, 249; 

 effect of dry seasons on settlement 



in, 138; 

 Fuel Administration, 272; 

 health and business, 26 ff . ; 

 Immigration Commission, 175; 

 seasonal variations in deathrate, 



61 f. 

 Usury, relation to climate, 201 f. 



Vanessa, 150 



Variability, importance of, 87 ff. ; 



importance of, in races, 165 ff. ; 



of climate during Glacial Period, 

 144 ff. ; 



of climate, effect on bodily forms, 

 182 ff.; 



of climate in ancient Rome, 190; 



of four largest cities, 236; 



of Jews and Negroes, 169 

 Variations, origin of, 166 ff. 

 Varro, 203 



Vegetation, in Permian Period, 111 f. 

 Ventilation, directions for, 274; 



experiments in, 99 ff. ; 



proper system of, 271 ff. 

 Vertebrates, development of, 107 f. 

 Vines, in ancient Italy, 199, 201 

 Virgil, 203 

 Volcanoes, in 14th century, 137 



War (see Great War) 



Warm blood, origin of, 112 f. 



Washburn, Geo., cited, 218 



Washington, seasonal variations in 

 deathrate, 62 f. 



Water, evolutionary effect of, 107 



Weather, effect upon deathrate, 60 ff. 

 (see Variability) 



West Point, mental optimiun of stu- 

 dents, 75 



