INDEX 



Munck, localization of motor 

 centres, iv. 274. 



Muscles, iv. 137. 



Musschenbroek, Pieter van, in- 

 ventor of the Leyden jar, ii. 

 280, 282. 



NAPLES, Marine Biological Labo- 

 ratory at, v. 113-143. 

 Natural versus supernatural, v. 



233. 234- 



Neanderthal skull regarded by 

 modern zoologists as a distinct 

 species of man, iii. 102. 



Neolithic civilization supplanted 

 by the invasion of cultivated 

 people from the East, i. 31. 



Neon, discovery of, v. 87. 



Neptune, the planet, its exist- 

 ence predicted by the Ger- 

 man astronomer Bessel, iii. 

 42 ; discovered five years later 

 by John Couch Adams, of 

 England, ibid. 



Neptunists, a name given to the 

 followers of Werner, who 

 denied the theory of the 

 metamorphosis of rocks, iii. 



J3 1 - 



Nerve cells, process of staining, 

 iv. 282 ; each an isolated 

 entity, iv. 283; importance of 

 the discovery of, iv. 285. 



Nerves, function of, iv. 249- 

 261. 



Newlands, John A. R., studies 

 of atomic weights, iv. 67. 



Newton, Isaac, ii. 225-251; dis- 

 covery of the composition of 

 white light, ii. 227; the nature 

 of color, ii. 233; the law of 

 gravitation, ii. 236; further 

 computations in the Principia, 

 ii. 243-250; invention of re- 

 flecting telescope, ii. 255. 



Nicetas, taught that the world 

 is in motion, i. 216. 



Nicholson and Carlisle, their 

 experiments with the gal- 

 vanic current in decomposing 

 water, iii. 232; they produced 

 a gas that on being mixed with 



common air exploded by the 

 contact with a lighted taper, 

 i. 233. 



Nile floods, without which civ- 

 ilization would be impossible 

 in Egypt, i. 35. 



Nippur, expedition to, i. 59. 



Nitrogen, discovered by Caven- 

 dish, v. 87. 



"Non-vital" to "vital," evolu- 

 tion from, v. 223. 



Nuclei of plant cells, discovered 

 by Robert Brown, iv. 115; 

 Dr. Schleiden brings to popular 

 attention, iv. 118. 



OERSTED, JEAN CHRISTIAN, the 

 first to pass an electric current 

 through a wire, iii. 236; it 

 showed the close relationship 

 between magnetism and elec- 

 tricity, iii. 238; effects of his 

 important discovery, iii. 239. 



Oken, Lorenz, extends the 

 doctrine of metamorphosis to 

 the animal kingdom, iv. 146; 

 his theory of spontaneous 

 generation and evolution of 

 species, iv. 160. 



Olbers, Dr., discoverer of the 

 planet Pallas, iii. 40; his 

 explosion theory, iii. 41; his 

 opinion of the great comet of 

 1680, iii. 52. 



Olzewski's experiments in liquid 

 oxygen, v. 61. 



Organic matter, possibilities of 

 producing, out of inorganic, v. 

 224. . 



Organicists* system, iv. 185; 

 theory of, iv. 187. 



Organism, comprehensive view 

 of, iv. 137; economy of the, iv. 

 138. 



Oriental archaeology, new science 

 of, iv. 287-302. 



Oriental ecclesiasticism as a 

 cause of indifference to science 

 in the dark age, ii. 4. 



Owen, Richard, discovers the 

 Trichina spiralis, iv. 207. 



Oxygen, liquefied by Pictet and 



291 



