282 



INDEX 



Heligoland, effect of storms on, 133 

 Heliotherapy, 97 



Heredity, vs. environment, 184 f. 

 Hoge, Mildred A., cited, 153 

 Houses, effect of dry air in, 86; 



ideal ventilation in, 103 f.; 



proper air in, 266 ff., 271 ff. 

 Howell, cited, 156 

 Humidification, directions for, 274 ff. ; 



value of, 271 

 Humidity, effect on comfort, 268 ff.; 



effect on deathrate, 67 ff.; 



effect on health, 85 f.; 



effect on school children, 99 ff. ; 



of four largest cities, 236; 



optimum of, 70 ff . ; 



relation to mutations, 150 ff. 

 Hungarians, effect of New York upon, 



175 ff. 

 Hybridization, as cause of mutation, 



149 

 Hyther, 268 f. 



Immigrants, change of bodily form 

 in, 174 ff. 



Immigration, and business, 44; 

 and health, 39 



Imports, in Germany, 48 



India, famines in, 138 



Infancy, effect of temperature dur- 

 ing, 183 



Infanticide, in Rome, 205 



Infants, variability of blood tempera- 

 ture, 113 



Influenza, 136; 



deathrate from, 60 



Infusoria, curve of reproduction, 156 



Inheritance, and civilization, 19 



Insects, evolution of, 112 



Insurance, on crops, 224 f. 



Ireland, famine in, 138 



Iron, origin of, 122 



Irrigation, in late Roman times, 204 



Isopracts, defined, 67, 254 



Italians, effect of New York upon, 



175 ff. 

 Italy, climate and history of, 228; 



climate and mentality in, 146 f . ; 



climatic contrast with Central Eu- 

 rope, 179; with Poland, 182; 



climatic similarity to California 

 and Palestine, 187 ff.; 



climograph of, 68 f . ; 



effect of winter in, 87; 



energy in Great War, 234 f . ; 



ravages of plague in, 137; 



seasonal variations in deathrate, 

 62 f. (see Rome) 



Japan, deaths in, 249; 



seasonal variations in deathrate, 

 62 f. 

 Java, early man in, 117 

 Jerusalem, rainfall of, 189 

 Jews, compared with Negroes, 168 f . ; 



effect of New York upon, 175 ff.; 



physical characteristics of, 169 ff. ; 



variations of, 167 ff. 

 Jones, W. H. S., cited, 200 

 Judas trees, 221 

 Jukes family, 164 

 Julius Caesar, 202 



Kammerer, cited, 156 f. 

 Kara Viren, irrigation at, 209 

 Knapp, M. C, cited, 269 

 Konia, 209, 218 

 Koppen, A., cited, 129 

 Kurds, relation to Turkish Govern- 

 ment, 213, 215 



Labor, mobility of, 44 f. 

 Labor Bureau, table of prices, 38 

 Land, changing values in ancient 

 Rome, 194 f.; 

 effect of movements on climate, 



128; 

 evolutionary effect of, 107 



