KEY AND INDEX 



Epagomenal days, the legend 

 of Osiris explaining, 1, 36. 



Epicycles, the doctrine of wheels, 

 1. 237- 



Erasistratus, one of the first to 

 discover that the nerve-trunks 

 have their origin in the brain 

 and spinal cord, 1, 194; his 

 disagreement with Herophilus 

 as to the functions of the 

 organs, 1, 195. 



Eratosthenes, called the "sur- 

 veyor of the world," 1, 226; 

 his important modification of 

 the gnomon, 1, 227; his 

 method of determining the size 

 of the earth, 1, 230; his con- 

 clusions have ever been re- 

 garded with admiration, 1, 

 231; additional reference to 

 his measurement of the world, 



7, 5- 



Ericsson, John, built caloric 

 engines on such a scale as to 

 be adapted to the propulsion 

 of ships 6, 134- 



Erman, Professor, an Egyptol- 

 ogist, 1, 28. 



Ernst Haeckel and the New 

 Zoology, Chapter VI, 6, 144. 



Etching, 8, 195; Rembrandt 

 and Van Dyck famous for 

 their etchings, 8, 196; Whist- 

 ler and Seymour Haden great 

 exponents of this kind of en- 

 graving, 8, 196. 



Ether and Ponderable Matter, 

 The, Chapter IX, 3, 283. 



Ether, James Clerk-Maxwell's 

 conception of, 3, 283; its 

 discovery one of the most im- 

 portant feats of the nine- 

 teenth century, 3, 284; dis- 

 covered by Thomas Young, 

 3, 285; the speculations con- 

 cerning it, 3, 286, 290. 



Etienne, Charles, discovers canal 

 in spinal cord, 2, 163. 



Euclid, the father of systematic 

 geometry, 1, 193. 



Eudoxus, made special studies 

 of the heavenly spheres, 1, 

 216; remarked the obliquity 

 of the ecliptic, 1, 228. 



Euler, Leonard, professor of 



Ehysics and mathematics at 

 t. Petersburg, 3, 17; his 

 demonstration concerning the 

 aphelia of Saturn and Jupiter, 

 3, 18. 



Eustachius, sixteenth-century 

 anatomist, 2, 165; tube, 

 ibid. 



Evans, Oliver, experiments with 

 high-pressure steam, designs 

 road vehicle, 6, 113; his 

 machine the "Oruktor Am- 

 phibious" combined the prin- 

 ciple of steamboat and loco- 

 motive, 7, 121. 



Evolution, Professor Marsh on, 

 3, 114. 



Evolution, Theories of Organic, 

 Chapter VI, 4, 140. 



Evolution of the Dwelling House, 

 Chapter VI, 9, 133. 



Existence, struggle for, ex- 

 plained and exemplified, 6, 

 3-6- 



Experiment, the first passenger 

 coach, 7, 129. 



Experimental Psychology, The 

 New Science of, Chapter IX, 

 4. 245-286. 



Eyde, S., his co-operation with 

 Prof. Birkeland in obtaining 

 nitrogen from the air, 6, 306. 



FALCONER, Dr., his description 

 of the fossil remains in the 

 museum of M. de Perthes, 3, 

 100. 



Fallopius, sixteenth-century an- 

 atomist, 2, 166. 



Faraday, Sir Michael, begins the 

 study of electro-magnetic in- 

 duction, 3, 240; his paper 

 before the Royal Society, 3, 

 241; his rotating disk, 3, 245; 

 just missed the discovery of 

 the conservation of energy, 3, 

 253; claimed the existence of 

 an invisible plenum every- 

 where in space, 3, 287; pro- 

 duces liquid chlorine, 6, 39; 

 experiments with gases, 6, 

 40; hoped to establish a rela- 

 tion between gravitation and 



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