INDEX. 



337 



Columbus, 55, 282. 



Combustion, 172, 173, 176. 



Comets, 98, 194 ; Encke's, 211, 212. 



Commentaries on Aristotle, 39. 



Common Knowledge, 2. 



Compass, 42, 51-54, 267. 



Competition, 292. 



Compressibility (Law of), 172, 217 ; 

 of Liquids, 232. 



Comte [SocioL], Founder of Posi- 

 tive Philosophy, 156. 



Comte,Classification of the Sciences, 

 no, in, 283. 



Concentric Mirrors, 22. 



Concrete and Abstract Knowledge, 

 H. Spencer on, 3. 



Condenser (Separate), 260. 



Conscience, 304. 



Conservation of Energy, 244, 283. 



Constants (Natural), 194. 



Constitution of the Heavenly 



Bodies, 250. 

 of the Sun, 205. 



of Science, 271. 



Contempt of Authorities, 270. 



Industry in Antiquity, 



16. 



Continuous Fractions, 193. 



Contrast between Islam and Chris- 

 tendom, 44. 



Cope [Palaeontologist], 123. 



Copernican System, 58, 99, 193, 271, 

 272. 



Copernicus, 55, 270. 



Cordova, 29, 31. 



Cork, 268. 



Corn Grinding, 289, 290. 

 Trade, 295. 



Corpuscular Physics, 226. 



Corpuscular Theory of Light, 218. 



Correggio, 64. 



Correlation of Forces (Law of), 242. 

 Structure, 120. 



Cort, 263. 



Corti's Fibres, 246. 



Cosmo de' Medici, 91. 



Coulomb [Physicist], Torsion 

 Balance, 223, 283. 



Countries (Scientific), xvi., 279-284. 



Countries (Scientific-), Table of, 280- 



282. 



Craniology, 149. 

 Credit, 299. 

 Creed in Islam and Christendom, 



44- 



Crookes [Chemist and Physicist], 

 his Theory of Chemical Evolu- 

 tion, 1 86, 187, 256, 257 ; Analysis 

 of Rare Earths, 188 ; Chemical 

 Fractionisation, 188. 



Cross-Staff, 54. 



Cruelty, 298. 



Crusades, 68, 71, 298. 



Cryophorus, 228. 



Crystallisation, 61. 



Crystallography, 176. 



Ctesibius, 24. 



Currents, Electric and Magnetic, 



237- 



Cusa, 97. 

 Cuvier, Founder of Comparative 



Anatomy and of Palaeontology, 



118, 161, 283. 

 Cycle of Calippus, 21. 



Melon, 20. 



Cyclone Theory, see Sun Spots. 

 Cylinder (The), 22, 219; Papin's, 



260. 



Cypher, 42. 

 Cyril, 32. 



DAGUERREOTYPE, 239, 261. 



Dalton, John, the "Newton" of 

 Chemistry, the Atomic Theory, 

 179 ; [Physicist], 228, 283. 



Dante, 65, 90 (note). 



" Dark Ages " a Misnomer, 64. 



Dark Lines in Spectra, 223, 228, 

 234, 249. 



Dark Rays, 206. 



Darwin, Charles [BioL], established 

 the Law of Biological Evolution, 

 134 ; proved the Variability of 

 Species by Natural Selection, 

 134 ; his place among Evolution- 

 ists, 138; his Works, 142, 143, 

 283. 



Darwin (Erasmus) [Biol.], held the 



