INDEX. 



551 



Ozone, notice respecting, 466. 



Pascal and Brianchon's theorems on conic 

 sections, remarks on, 49. 



Pearce (J. C.) on the locomotive and 

 non-locomotive powers of the Crinoi- 

 dea, 57 ; on a new species of Encri- 

 nite, 58. 



Pectic acid, analysis of, 319: 



Phillips (R.) on the elasticity of gases, 

 354; on the adjusting power of the 

 eye, 474. 



Phonetics, observations relative to the 

 science of, 279, 420. 



Phosphoric acid, existence of, in rocks of 

 igneous origin, 467. 



Photographic processes, account of some 

 new, 435, 544. 



Photography, on the practice of the calo- 

 type process of, 322. 



Plants, action of yellow light in pro- 

 ducing the green colour, and indigo 

 light the movements of, 1 ; on the in- 

 fluence of light on, 96 ; on the ascent 

 of the sap in, 461. 



Polarization, elliptic, on the mode of 

 making experiments upon, 380. 



Potassium and antimony, detonation of 

 the alloy of, 153. 



Pratt (S. P.) on the geology of the neigh- 

 bourhood of Bayonne, 55. 



Preisser and Girardin (MM.) on the com- 

 position of ancient and fossil bones, 

 154. 



Prime numbers, on the empirical law in 

 the enumeration of, 192. 



Pseudo-ceraine, composition of, 20. 



Pyramids of Gizeh, on the entrance pass- 

 ages in the, 481. 



Pyromeconic acid, on the properties and 

 constitution of, 128. 



Rabbit, development of the ovum of the, 

 42. 



Rainey (G.) on the ascent of the sap in 

 plants, 461. 



Reflexion, metallic, on the laws of, 380. 



Rigg (R.) on the secretion of carbon by 

 animals, 468. 



Robertson (A.) on the freshwater fossils 

 of Brora, 71. 



Rocks, on the scratched surfaces of, 230. 



Royal Astronomical Society, proceedings 

 of the, 300, 516. 



Roval Irish Academy, proceedings of the, 

 380. 



Royal Society, proceedings of the, 206, 

 455 ; Address of the President, 207. 



Royle (Prof.) on the tin-mines of the 

 Tenasserim province, 63. 



Rutile, analysis of, 477. 



Sabine's (Col.) contributions to terrestrial 

 magnetism, 466. 



Salmon (G.) on the properties of surfaces 

 of the second degree, 49. 



Saturn, on the divisions of the exterior 

 ring of the planet, 306. 



Schcenbein (Prof.) on ozone, 466. 



Scorodite, on the identity of, with neoc- 

 tese, 476. 



Sedgwick (Rev. A.) on the geological 

 structure of North Wales, 246. 



Silver, on a curious change in the mole- 

 cular structure of, 503. 



Silver ores, on the amalgamation of, in 

 Mexico, 467. 



Simms (F. W.) on the geology of the vici- 

 nity of Hythe, 308. 



Simple Bodies of Chemistry, Inquiry into 

 the Nature of the, reviewed, 296. 



Sismondine, description and analysis of, 

 238. 



Smith (J. D.) on ferric acid, 41, 498. 



Smyth (C. P.) on the apparent magni- 

 tude of the fixed stars, 516 ; on the 

 advantages of employing large specula 

 for astronomical observations, 518. 



Specula, on the advantages of employing 

 large,for astronomical observations,5 1 8. 



Spencer (H.) on the reciprocal depend- 

 ence of animals and vegetables as re- 

 gards its bearing on palaeontology, 90. 



Stanger (Dr. W.) on the geology of the 

 west coast of Africa, 217. 



Stars, on the apparent magnitude of the 

 fixed, 516. 



Stenhouse (J.) on the products of distil- 

 lation of meconic acid, 128. 



Sulphates, on a class of double, 502. 



Sulphocamphoric acid, observations on, 

 157. 



Sylvester (J. J.) on the analysis of com- 

 binatorial aggregation, 285. 



Tagua nut, chemical examination of the, 

 104. 



Taylor (T.) on some new species of biliary 

 and intestinal concretions, 354. 



Teas, observations on the green, of com- 

 merce, 507. 



Tebay (S.) on the demonstration of the 

 rule of Descartes, 24. 



Teschemacher (E. F.) on African guano, 

 394. 



Thionurate of ammonia, observations on, 

 189. 



Tides, observations on, 485. 



Tin-mines of the Tenasserim province, 

 observations on the, 63. 



Trevelyan (W. C.) on scratched surfaces 

 of rocks, 230. 



Uric acid, on some products of the de- 

 composition of, 186. 



Vegetable ivory, chemical examination 

 of, 104. 



