INDEX. 



607 



Nitrogen , on a new method of determining, 

 278. 



Nitrogurets, electro, 97. 



Nitro-naphthalic acid, 46. 



Nitro-saccharic acid, 94. 



Nitrurets, examination of several, 278. 



Noad (M.) account of experiments with 

 a water battery, 405. 



Nordenskiold (Prof.) on furrowed rocks 

 in Finland, 524. 



North Wales, if any evidence of the ex- 

 istence of glaciers in, 469. 



Norton (Capt. J.) on a percussion shell to 

 explode at the bottom of the sea, 240. 



Oils : — of turpentine, 187 ; sethereal, 189. 



Olbers (Dr.) on a reformation of the con- 

 stellations, and a revision of the no- 

 menclature of the stars, 571. 



Orbit, anatomy and physiology of certain 

 structures in the, 163. 



Organized beings, chemical statics of, 

 337, 456. 



Ova of man and mammiferous animals, 

 240. 



Owen (Prof.) on the teeth and skeleton 

 of the genus Labyrinthodon from the 

 German keuper and sandstone of War- 

 wick and Leamington, 315, 394. 



Oxmantown (Lord) on a large reflecting 

 telescope lately constructed by, 584. 



Paraselene, witnessed on May 6, 1841, 50. 



Park (Rev. J.) on an improvement in the 

 air-pump, 59. 



Pearson (Rev. Dr.) on a new catalogue 

 of moon-culminating stars, observed at 

 South Kilworth, 581. 



Peligot (M.) on salts of lead formed by 

 nitrous acid, 186 ; on salts of lead con- 

 taining acids of oxygen and azote, 598. 



Pelouze (M.) on the action of sulphuric 

 acid on nitrate of ammonia, 251 ; on the 

 preparation of azotic gas, 252 ; con- 

 centration of nitric acid by means of 

 sulphuric acid, ib. 



Percussion shell, description of a, to ex- 

 plode at the bottom of the sea, 240. 



Pernambuco, on a remarkable bar of 

 sandstone off, 257. 



Petrie (W.) on electricity and magnetism, 

 374. 



Phosphorus,onthesupposedhydrateof,93. 



Photogenic drawing, on, 88, 164. 



Photography, improvements in, 164. 



Physics, on a new theory of, 519. 



Poggendorff (Prof.) on the intensity of 

 current of the zinc iron circuit, remarks 

 by Martyn Roberts on, 107. 



Poisson (M.), remarks on a statement in 

 the Traite de Mecanique of, 287. 



Polarimeter, description of a, 158. 



Potash, preparation of iodate of, 334 ; 

 action of peroxide of iron on, 412 ; 



ferroprassiate of, 514 ; acid cyanurate 

 of, 517. 



Potassa, action of camphor on, 47 ; action 

 of, on indigo-blue, 191. 



Potter (R.) on the phaenomena of dif- 

 fraction in the shadow of a circular 

 disc, 153. 



Powell (Prof.) on the theory of light, 372. 



Prussic acid, new mode of forming, 281. 



Pyrope, on the composition of, 594. 



Pyroxylic spirit, strengths of, 511. 



Radiation, a property of heat, not of 

 electricity, 87. 



Radices, primitive, 369. 



Rammelsberg (Dr.) on bromic acid and 

 its salts, 48 ; on the stibio- and arsenio- 

 sulphurets, 283. 



Redtenbacher (Profs.) on the atomic 

 weight of carbon, 210. 



Reinsch (H.) on the action of metallic 

 copper on solutions, 480. 



Reproduction, on the organs of, 520. 



R. L. E., on M. Mossotti's theory of mole- 

 cular action, 384. 



Roberts (Martyn) on the analogy be- 

 tween the phaenomena of the electric 

 and nervous influences, 31 ; on radia- 

 tion, 87; remarks on Prof.Poggendorff's 

 paper on the intensity of current of the 

 zinc-iron circuit, 106. 



Robinson (Rev. T. R.) on a large reflecting 

 telescope, by Lord Oxmantown, 584. 



Rocks, volcanic, 170; non-volcanic, 172; 

 polished, of Fontainbleau, 409. 



Rose (Prof. H.) on arseniuretted hydro- 

 gen, 185. 



Royal Society, proceedings of the, 156, 

 240, 483, 517. 



Russia, on the geological structure of 

 parts of, 417, 489. 



Salicine, action of peroxide of lead on, 

 38 ; analysis of, 39. 



Salicone, 40 ; analysis of, ib. 



Samselius (M.) on double cyanurets of 

 zinc, 282. 



Sandstone, on a'remarkable bar of, off Per- 

 nambuco, 257. 



Schcenbein (Prof.) on the electrical ef- 

 fects of the Gymnotus, 404. 



Schrotter (M.) on nitrurets, 279. 



Shells, optical phaenomena of, 403. 



Silicon, alleged conversion of carbon into, 

 295, 388. 



Silver, malate of, 312 ; action of copper 

 on, 482. 



Smith (J.) on the geology of the island 

 of Madeira, 170. 



Smith (J. D.) on the alleged conversion 

 of carbon into silicon, 295. 



Snow (R.) on the aurora borealis, 579. 



Solly (E., Jun.), description of an electric 

 thermometer, 391. 



