INDEX. 



347 



Laws of Pressure, 98. 



Refraction, 62, 192. 

 Sound, 275. 

 Torsion of Wires, 223. 

 Vibration, 227. 



Learned Societies in the Revival, 

 64. 



Learning in Islamand Christendom, 

 46. 



Lecky quoted, 299. 



Lecoq, 138. 



Legendre [Math.], 195. 



Leibnitz [Math.], 193 ; [Geol.], 193, 

 244, 272, 282. 



Leidy [Palaeontol.], 123. 



Lelio, 58, 97. 



Lens (Convex), 36, 102, 267. 



Lenses for Lighthouses, 236. 



Lenticular Spectroscope, 233. 



Leo III., 47. 



Leonardo da Vinci's Discoveries, 

 55, 56,64,98,282,283. 



Leonardo da Vinci's Geology, 99. 



Leonardo da Vinci's Inductive Pro- 

 cess, and Injunctions thereon, 

 104-107, 270. 



Leonardo da Vinci's Inventions, 99, 

 104. 



Leonardo da Vinci's Physics, Ap- 

 pendix IV. 



Leslie [Physicist], 228. 



Leuwenhoeck [Physiol.], 124, 272. 



Lever, The Law of the, 22, 57, 98. 



Leverrier [Astron.], 211. 



Leyden Jar, 220. 



Liais, Height of the Atmosphere, 

 36. 



Libavius, 56. 



Liberty, 284. 



Libraries, Arabian, 43 ; Cairo, 43, 

 European, 70. 

 Spanish, 43. 

 Tripoli, 43. 



Libration, 204. 



Liebig [Chemist], Chemistry ap- 

 plied to Agriculture, Organic 

 Chemistry, Potash Bulbs, 184. 



Life, 55. See Primitive Forms of 

 Life. 



Lifts, 22. 

 Light, 210. 



Decomposition of, 218. 



Diffraction of, 217, 235. 



Electric, 182, 225, 227. 



Energy of, 242. 



Interference of, 217, 218, 235. 



Laws of, 272, 275. 



Polarisation of, 218. 



Solar, 257. 



of Stars, 211. 



Undulatory Theory of, 103, 

 192,194,217,218,228,229. 



Velocity of, 199, 245. 



Zodiacal, 199. 

 Lighthouses, 236. 

 Lightning and Electricity, Identity 



of, 221. 



Lightning Conductor, 221. 

 Lindley [Botanist], 115. 

 Linnaeus [Botanist], 115, 273. 

 Lippershey, 58. 

 Liquefaction of Gases, 255 ; (of Air), 



256. 



Liquids, Compressibility of, 232. 

 Literature, 43, 66, 70, 91-2, 95, 298, 



307. 



Lithography. 261. 

 Lobel, 62, 96. 

 Lockyer (Norman) [Astron.], 213 ; 



his Meteoritic Hypothesis, 214. 

 Locomotive, 261, 283. 

 Logarithms, 55, 58. 

 Logic and Mathematics (Union of), 



196 



Longitudes, 25. 

 Louis IX., 65. 



XL, 30. 



Love of Truth revived, 304, 305. 

 Lubbock [Biol.], 148. 

 Luminiferous Ether, 211, 217, 229. 

 Luther's Attacks on the Church, 



307. 



Lyell [Geol.], 138, 139, 141, 283 ; 

 Geological Laws, 165. 



MACHAULT [Sociol.], 155. 

 Machinery, Electric, 216. 



Steam, 219, 275, 283. 



