550 



INDEX. 



Lead, occurrence of, in sulphuric acid, 



314. 

 Lemniscates and other curves, on the rec- 

 tification of, 138. 

 Liehig (J.) on the formation of fat in the 



animal body, 19. 

 Light, on the relations which connect 

 electricity and heat with, 254. 



, invisible, observations on, 225, 356. 



Lightning conductors, on the use of, in 



India, 177. 

 Lime, action of nitric acid on the carbo- 

 nate of, 78. 

 Logan (M.) on the St. Lawrence, and on 

 the modern deposits of its valley, 459. 

 Luminous appearance seen on the i/th of 



March 1843, on a, 54. 

 Lyell (C.) on the ridges, elevated beaches 

 &c. of the Canadian lakes and valley of 

 the St. Lawrence, 183 ; on the geo- 

 logical position of the Mastodon gi- 

 ganteum, 190 ; on the tertiary forma- 

 tions of the United States, 305 ; on the 

 fossil foot-prints of birds, &c. in the 

 valley of Connecticut, 515. 

 Lymphatic vessels, on the import and 



office of the, 52. 

 MacCullagh (Prof.) on the solution of the 

 problem of total reflexion for ordinary 

 media and for uniaxal crystals, 137. 

 Magnetism, terrestrial, contributions to, 



377, 380. 

 Magneto-electricity,on the calorific effects 



of, 263, 347, 435. 

 Malic acid, on the preparation of, from 



the garden rhubarb, 327. 

 Mallet (R.) on the occurrence of a me- 

 tallic alloy in an unusual state, 141. 

 Mantell (Dr.) on American fossils, 186 ; 

 on fossil fruits from the chalk forma- 

 tion, 541. 

 Mastodon giganteum, on the geological 



position of the, 190. 

 Mastodontoid animals, on the structure 

 and history of, 464 ; on the structure 

 of the tusks of, 468. 

 Matteucci (M.) on the phosphorescence 



of the glow-worm, 543. 

 Meillet (A.) on some new combinations 



of cyanogen, 157. 

 Menabrea (M.) on Mr. Babbage's analy- 

 tical engine, 235. 

 Mercury, action of chlorides on the pro- 



tochloride of, 233. 

 Metallic alloys, observations on some, 141. 

 Metallic oxides, action of sulphurous acid 



on, 397. 

 Metals, reduction of, from solutions of 

 their salts by the voltaic circuit, 51 ; on 

 some new, 241. 

 Meteorological observations, 79, 159, 239, 

 319, 399, 479. 



Milk, on the changes in composition of, 



281. 

 Millon (M.) on nitric acid, 231. 

 Mollusca, on the fossilized remains of the 



soft parts of, 542. 

 Montojo (M.) on the comet of 1S43, 149. 

 Mosander (Prof.) on cerium, lanthanium 

 and didymium, 241 ; on yttria, ter- 

 bium, and erbium, 251. 

 Moser (Prof. L.) on the so-called caloro- 

 types, 356 ; experiments and observa- 

 tions on the discoveries of, 225, 415. 

 Murchison (R. I.) on the geology of 

 Russia, 57 ; on the geological structure 

 of the Ural mountains, 124. 

 Myriapoda, on the structure and develop- 

 ment of the nervous and circulatory 

 systems in, 371. 

 Nasmyth (Alex.) on the minute structure 

 of the tusks of extinct mastodontoid 

 animals, 468. 

 Nerves, on the origin of, 384. 

 Newport (G.) on the development and 

 circulatory system of the Myriapoda, 

 371. 

 Nitric acid, observations on, 231. 

 Nitrogen, on the compound nature of, 



135. 

 Nitro-theine, composition of, 434. 

 Noad's (H. M.) lectures on chemistry, re- 

 viewed, 45. 

 Observatories of Greenwich and Paris, 

 recomputation of Roy's triangulation 

 for connecting the, 147. 

 Olivile, observations on, 156. 

 Ornithoidicnites, on some specimens of, 



186. 

 Owen (D. D.) on the geology and palaeon- 

 tology of North America, 180 ; on the 

 geology of the western states of North 

 America, 518. 

 Palaeontology of North America, on the, 



180. 

 Palladium, extraction and alloys of, 16, 



398. 

 Panary fermentation, observations on, 



321. 

 Pechblende, on the composition of, 475. 

 Pelletier (M.) on the products of the de- 

 composition of amber by heat, 477. 

 Pepys (W. H.) on the respiration of the 



leaves of plants, 378. 

 Persian berries, on the colouring matter 



of the, 3. 

 Phosphorescence of the glow-worm, ob- 

 servations on the, 543. 

 Pierce (B.) on the comet of 1843, 152. 

 Plants, on the descending fluids of, 54 ; 

 on the respiration of the leaves of, 378. 

 Playfair (L.) on the changes in the com- 

 position of the milk of the cow, 281. 

 Pollock (R.) on the comet of 1843, 150. 



