240 



INDEX 



Duncan, R. K., 214 

 Dunsheath, P., 204 

 Dye industry and research, 175 

 Dynamo, 104 



Eastman, George, 202 

 Eastman Kodak Company, 207, 208 

 (See Kodak Research Labo- 

 ratories) 

 Eberth, C. J., 167 

 Ecclesiastics and universities, 173 

 Ecology, 163, 164 

 Economics and politics, foresight 



in, 228 

 Edison, Thomas A., 44, 61, 62, 109 

 Edison effect, 44 

 Eggs, fertilization of, 158, 159 



of mammals, 149 

 Egypt, art in, 36 



craftsmen in, 68 



Eighteenth Dynasty, 28 



Fourth Dynasty, 27, 28, 30, 37 



history of, 27, 30 



instrumental equipment in, 18 



Middle Kingdom, 28, 30, 37 



New Kingdom, 30, 37 



Old Kingdom, 27, 28, 30, 226 



prehistoric dating of, 25 



Twelfth Dynasty, 28, 30, 37 

 Einstein, Albert, 56, 94, 113, 114, 



115, 142 

 Electric arc lamp, 103 

 Electric battery, 103 

 Electric light, 104 

 Electric motor, 104 

 Electrical engineering, 104 

 Electricity, alternating current, 104 



conduction of, 102 

 through gases, 105 



current, 103 



early history, 102 



induction of, 102 



nature of, 104 



static, 103 



Electricity, technology of, 44 

 Electrolytes, 133 

 Electrolytic dissociation, 133 

 Electromagnetism, early, 103 

 Electron microscope, 113, 168 

 Electronic tubes, 109 

 Electronics, 109 

 Electrons, 108, 109, 137 



diffraction of, 113 

 Electrons and waves, 113 

 Elements, chemical, classification 



of, 133, 134 

 Embryology, 149 

 Emotion and politics, 232 

 Empedocles, 71 

 Energy, conservation of, 94 



radioactive, 140 



transformation of, 94 

 Engineering, progress in, 43 

 Enriques, 56 

 Entropy, 94, 95 

 Enzymes, 130 



Epicurean philosophy, 72, 73 

 Epigenesis, 150 

 Eratosthenes, 72 

 Essex, Earl of, 80 

 Ether, 99 

 Euclid, 72 

 Euler, L., 92 

 Evans, Joan, 226 

 Evelyn, John, 83 

 Evolution, 145, 148, 162, 165 



Facts, classification of, 44, 49 



collection of, 81 



observation of, 49, 53 



observers of, 49 



selection of, 52 

 Facts and theories, 54 

 Faraday, Michael, 20, 54, 104, 105, 



125, 133 

 Fellowships, industrial, 214 

 Fermat, Pierre de, 96, 99 



