284 



INDEX 



physiological effect on immigrants, 



174 flF.; 

 seasonal variations in deathrate, 



62 f.; 

 variations in deathrate, 30 f . ; 

 winter conditions of, 272 ff. 

 New York State, ventilation com- 

 mission, 99 

 Nordic Race, entrance to Europe, 



122, 141 

 Norlind, A., cited, 132 

 North Sea, in 14th century, 133 

 Norway, effect of climatic changes, 



132 

 Nurse-toad, mutation of, 157 



Oligocene mammals, 257 f. 

 Olives, in ancient Italy, 199, 201 

 Open-air treatment, 96 

 Optimum climate, 98 if. ; 



effect on business, 55 (see Hu- 

 midity, and Temperature) 

 Optimum temperature, and humid- 

 ity, 70 fF.; 



relation to blood heat, 75 

 Origin of New Types, 164 if. 

 Osborn, H. F., cited, 115, 118 ff., 256 

 Owen's Lake, 131, 146 

 Owls, asymmetry among, 163 



Palermo, rainfall of, 189 

 Palestine, climatic similarity to Cali- 

 fornia and Italy, 189; 



drought in, 220; 



expansion of, 227 

 Patricians, of ancient Rome, 191 ff. 

 Peasants, of ancient Rome, 191 ff. 

 Pedersen, cited, 75 

 Penck, A., cited, 118 

 Permian Period, causes of mutations 

 in, 152; 



life in. 111 f. 

 Pestilence, 136 ff. 

 Petrarch, 147 



Pettersson, O., cited, 132 f. 

 Philadelphia, seasonal variations in 



deathrate, 62 f. 

 Philanthropy, as a panacea, 17 

 Pierce, W. D., cited, 255 

 Pig iron, trend of prices of, 245 

 Piltdown man, 118 f. 

 Pithecanthropus, 117 

 Plague, 136 ff. 



Plants, curve of growth, 156 

 Pleistocene (see Glacial Period) 

 Pliny, cited, 199 

 Pliocene mammals, 257 f . 

 Plough, H. H., cited, 155 f. 

 Pneumonia, deathrate from, 60 

 Poland, climatic contrast with Italy, 



182 

 Poles, effect of New York upon, 175 ff. 

 Political conditions, in ancient Rome, 



193 ff. 

 Population, density in best climates, 



237 

 Po Valley, 194 

 Prices, and health, 38; 



secular trend of, 246 f , 

 Prosperity, and crops, 41 f . ; 



and health, 39 f. 

 Psychology, of economic cycles, 28; 



of health and business, 54 

 Punic Wars, 194 



Race mixture, effect on Jewish phy- 

 sique, 170 f. 

 Races, origin of, 142, 164 ff. ; 



relation to Great War, 227 ff. 

 Racial character and health, 227; 

 Racial mixture, as cause of variation, 



166 f. 

 Radio-activity, and geological time, 



256 ff. 

 Radosavljevich, P. R., cited, 167 f. 

 Rainfall, in California and Mediterra- 

 nean regions, 189 f.; 

 of Turkey, 215, 217 f. 



