290 INDEX 



Cotton Boll-Weevil, 195 

 Coulter, John M., 167 

 Creevy, 27 

 Curzon, 24 



Darwin, Charles, 168, 173 



Darwin, Erasmus, 172 



Davis, 250 



Degeneration of Potatoes, 225 



Department of Agriculture, 192 



DeVries, 175 



Diphtheria, 66 



Dirigible Balloons, 4 



Disease Germs, 64, 103, 136 



Drake, 14 



Dunlop, 37 



Eddy, Walter H., 258, 265 

 Educational Value of Modern Bo- 

 tanical Gardens, 162 

 Ehrlich, 65, 68 

 Eijkman, 271, 272, 286 

 Electricity, 80, 95 

 Electrons, 80 



Electrons and How We Use Them, 78 

 Embryology, 170 

 Emerson, 181 

 Energy, 79 



Energy Values of Food, 252 

 Epidemic Influenza, 99 

 Epidemics, 151 

 Evolution, 167 



Expenditure on Motor Cars, 30 

 Experimental Study of Evolution, 



* 7S 

 Explosives, 4, 57, 58 



Fats, 259 

 Fermentation, 136 

 Food, 247 



Food Chemistry, 249 

 Food Production, 179 

 Food Supply, 261 

 Ford, Henry, 26, 36 

 Forest, 213, 220 

 Formaldehyde, 73 

 Fruits, 259, 285 

 runk, Casimir, 273 



Gallieni, 24 



Gas Engine, 24, 41 



Gasolene as a World Power, 12, 17 

 Gates, Frederic L., 99 

 Giant Potato Plants, 225 

 Gipsy Moth, 194 

 Gliadin, 257 

 Goethe, 172 



Helium, 4, 82, 84 

 Hermit Crabs, 205 

 History of Evolution, 168, 171 

 Honey-Bees, 202, 210 

 Hongkong School of Tropical Medi- 

 cine, 154 



Hookworms, 67, 159 

 Hopkins, 250 

 House Fly, 190 



How the Forests Feed the Clouds, 212 

 Howard, L. O., 190 

 Human Nutrition, 249 

 Humidity, 220 

 Hydrogen, 87 

 Hydrophobia, 145 



Ichneumon, 208 



Ideals of Science, 188 



Immunity from Tuberculosis, 127 



Indigo, 61 



Industrial Revolution, 40 



Influence of Coal-Tar on Civiliza- 

 tion, 48 



Influenza, 99 



Ions, 90 



Insect Enemies, 192 



Insect Sociology, 199, 210 



Insects, 190 



International Office of Hygiene, 155 



International Public Health, 150, 

 159 



International Sanitary Bureau, 15? 



International Health Board, 159 



Inventions, The Greatest, 28 



Isotopes, 93 



apanese Beetles, 197 

 enner, 142 



ohns Hopkins University, 258 

 uvenal, 49 



Kellogg, Vernon, 199 

 Kerosene, 18 



