278 



INDEX 



Big Trees, of California, as a climatic 



measure, 131, 146, 187 flF. 

 Birth rate, effect of drought on, 139 

 Black Death, 136 ff. 

 Blondness, among Greeks and Ro- 

 mans, 170 f. ; 

 among Jews, 170 ff. 

 Blood heat, relation to optimum tem- 

 perature, 75; 

 variability of, 161 

 Boas, F., cited, 174 ff., 180 

 Boccaccio, 147 

 Bohemians, effect of New York upon, 



175 ff. 

 Borkara, effect of storms on, 133 

 Bosphorus, 217, 221 

 Brain, evolution of, 117 ff.; 

 plasticity of, 179; 

 sensitiveness of, 232 

 Bureau of Child Hygiene, N. Y. City, 



101 

 Business and health, 26 ff.; 



cycles in foreign countries, 43 

 Butterflies, mutations of, 150 ff. 



California, climatic similarity to Italy 

 and Palestine, 187 ff.; 

 effect of wind in, 70; 

 effect of winter in, 87 



Canton, experiments at, 267 f. 



Carbonic acid gas, effect on climate, 

 128 



Carnegie Institution, Desert Labora- 

 tory of, 152 



Carthage, climatic conditions of over- 

 throw, 228; 

 wars of, 194 



Caspian Sea, fluctuations of, 131 



Cato, cited, 199 



Cattell, J. McK., cited, 166 



Cavemen in Europe, 122 



Central Europe, climate in, vs. Italy, 

 179 



Cephalic index (see Head-form) ; 



of Jews, 169 ff., 173 ff. 

 Changes of climate, 87 (see also 



Variability) 

 Chicago, experiments at, 152; 



variations in deathrate at, 30 f ., 

 249 f. 

 Children, attendance at school, 37; 



effect of temperature on, 183; 



health of school, 20, 22; 



of immigrants in New York, 174 ff. 

 (see also School children) 

 China, experiments in, 267 f . ; 



origin of diseases in, 136 ff. ; 



sunspot records in, 133 

 Chromosomes, "crossing-over" of, 



155 f. 

 Cicero, 203 

 Cimabue, 147 

 Cities, head-form in, 180; 



human variability in, 166 f. 

 Civilization, distribution of, 229 f . ; 



relation to climate, 229 

 Civil service examinations, 32, 35 

 Clark, A. H., cited, 162 ff. 

 Climate, and art, 146 f . ; 



and civilization, 229; 



and Dark Ages, 206; 



and energy, 229; 



and Great War, 227 ff.; 

 ' and health, 58 ff . ; 



and migration, 149; 



and natural selection, 148; 



and World-Power, 227 ff.; 



effect on head-form, 181 f.; 



effect on Jewish physique, 170 ff.; 



effect on Turkey, 208 ff., 221 ff.; 



ideal, 98 ff., 142 ff., 235 f.; 



of Devonian Period, 109; 



of Glacial Period, 125 ff.; 



of greatest cities, 235 f.; 



of Italy vs. Central Europe, 179; 



of Mississippian Period, 109 

 Climatic changes, causes of, 125 ff. ; 



