INDEX 



balming, i. 136; his conception 

 of evolution, i. 137; he had 

 a secure place among the 

 anticipators of the modern 

 evolutionist, i. 138; his studies 

 of the force of air pressure, i. 

 247. 



Epagomenal days, the legend of 

 Osiris explaining, i. 36. 



Epicycles, the doctrine of wheels, 



i- 2 37- 



Erasistratus, one of the first to 

 discover that the nerve-trunks 

 have their origin in the brain 

 and spinal cord, i. 194; his 

 disagreement with Herophilus 

 as to the functions of the 

 organs, i. 195. 



Eratosthenes, called the "sur- 

 veyor of the world," i. 226; 

 his important modification of 

 the gnomon , i . 2 2 7 ; his method 

 of determining the size of the 

 earth, i. 230; his conclusions 

 have ever been regarded with 

 admiration, i. 231. 



Ermann, Professor, an Egyptol- 

 ogist, i. 28. 



Ether, James Clerk - Maxwell's 

 conception of, iii. 283; its dis- 

 covery one of the most im- 

 portant feats of the nineteenth 

 century, iii. 284; discovered by 

 Thomas Young, iii. 285; the 

 speculations concerning it, iii. 

 286, 290. 



Etienne, Charles, discovers canal 

 in spinal cord, ii. 163. 



Euclid, the father of systematic 

 geometry, i. 193. 



Eudoxus, made special studies of 

 the heavenly spheres, i. 216; 

 remarked the obliquity of the 

 eclipse, i. 228. 



Euler, Leonard, professor of 



Ehysics and mathematics at 

 t. Petersburg, iii. 17; his 

 demonstration concerning the 

 aphelia of Saturn and Jupiter, 

 iii. 18; solved the problem of 

 the procession of the equinoxes, 

 iii. 19. 



Eustachius, sixteenth - century 



anatomist, ii. 165 ; tube, 



ibid. 

 Evolution, Professor Marsh on, 



iii. 114. 

 Experimental psychology, iv. 



245-286. 

 Experiments with air, iv. 6, 7. 



FALCONER, DR., his description 

 of the fossil remains in the 

 museum of M. de Perthes, iii. 

 100. 



Fallopius, sixteenth-century an- 

 atomist, ii. 1 66. 



Faraday, Sir Michael, begins the 

 study of electro-magnetic in- 

 duction, iii. 240; his paper 

 before the Royal Society, iii. 

 241; his rotating disk, iii. 245; 

 just missed the discovery of 

 the conservation of energy, iii. 

 253; claimed the existence of 

 an invisible plenum every- 

 where in space, iii. 287; pro- 

 duces liquid chlorine, v. 39; 

 experiments with gases, v. 

 40; hoped to establish a rela- 

 tion between gravitation and 

 electricity or magnetism, v. 



2I 5- 



Favus, cause of, iv. 208. 



Fechner, Gustav, his Psycho- 

 physik , i v. 263 ; verifies Weber's 

 fundamental law of psycho- 

 physics, iv. 266. 



Ferrel, Professor William, form- 

 ulated a general mathematical 

 law concerning wind currents, 

 iii. 200. 



Ferrier, Dr. David, and brain 

 localization, iv. 273. 



Fifteenth - century medicine, ii. 



39- 



Floods, those of the Nile, the 

 Tigris, and Euphrates a most 

 tangible index of the seasons, 

 i. 66. 



Flourens, Marie Jean Pierre, ex- 

 periments in nerve physiol- 

 ogy, iv. 270; discovers the 

 "vital knot," ibid. 



28l 



