INDEX. 



357 



Universal Sympathy, 306. 

 Universality of Science in the 



XlXth Century, 274. 

 Universities, 40, 70. 

 Unit of Electrical Resistance, 239. 

 Unity of Matter, 82, 187, 256. 

 Uranus, 206. 

 Urban 1 1., 65. 



Utility (an Incentive to Science), 

 H. Spencer on, 2-3. 



Humboldt on, 3. 



in the Middle Ages, 4. 



in Modern Times, 4. 



VACCINATION, 126. 

 Vacuum now Obtained, 256. 

 Value of Instruments, 266. 

 Valve, 219. 

 Van Helmont, 60. 

 Vaporisation of Liquids, 228. 

 Vapours, 41 ; Decomposition of, 

 by Light, 257. 



Absorbing Power of, 257. 

 Variation (of the Moon), 34. 

 Variations (Calculus of), 194. 

 Varley, 258, 264. 

 Vasco de Gama, 55, 85. 

 Vauquelin [Chemist], 178. 

 Velocity of a Falling Body, 193 ; 

 of Electricity, 240. 



of Light, 199, 241, 245 ; 

 of Sound, 245 (note). 



of Stars, 252-4. 



Vibrations, 257. 

 Velocities, 36, 99. 



Venus, Phases, 6; Transit, 198, 203. 

 Vesalius, 67, 97, 269, 283. 

 Vesta, 209. 



Vibrations (Musical), 102, 191, 194, 

 220 ; Rod, Glass, Metallic Plates, 

 Laws of, 227. 



Vicq d'Azir [Physiol.], 125. 

 Viete, 57. 



Villeneuve (Arnault de), 44. 

 Vincent de Beauvais, 44. 

 Violence, 298. 

 Violin, 54. 



Virchow [Biol.], Founder of Cellular 

 Pathology, 144. 



Virtue, 304. 



Vision, Nature of, 35. 



Vitellio's Optics, 54. 



Vitry (James de), 52, 71. 



Vogt [Anthrop.], 1 50. 



Volcanoes, 26, 165. 



Volta [Physicist], 225, 273, 282-3. 



Voltaic Battery and Pile, 225, 



227. 



Voltameter, 238. 

 Vortex Theory, 247, 255, Appendix 



VI, 330. 

 Von Baer, see Baer. 



Buch, see Buch. 



Mohl, see Mohl. 



WALLACE [Biol.], 139, 141* H3-4- 



Wallis [Math.], 192. 



Waltherus, 55, 97. 



Want of Instruments in Antiquity, 



IS- 

 of Material Substances in 



Antiquity, 16. 

 of Mathematics in Antiquity, 



15- 



War, 298 ; Decline of, 299. 



Warfare, 69. 



Watches, 53, 218. 



Water, Decomposition of, 227. 



Watermills, Windmills, 51 ; Bene- 

 fits from, 290, 292. 



Watt, 174, 226, 260-1, 273, 283. 



Watts' Dictionary of Chemistry, 

 vii. 



Wave Lengths (of Light), 229. 



Wealth, Increase of, 263, 274. 



Weber, 240. 



Weight and Pressure of Air, 192, 



215-6. 

 of the Earth, 223. 



Weismann [Biol.], 142-3. 



Wells, Dr., 138. 



Werner [Geol.], 49 ; Neptunian 

 Theory, 161, 283. 



Wheatstone [Physicist], 231, 240, 

 245, 283. 



Whitworth, 262. 



Whewell, Dr., 27 (note). 



Wiclif, 65, 283. 



