606 



INDEX. 



Photography, on the solar spectrum and, 

 239. 



Photometry in connexion with physical 

 optics, 16. 



Physiology of cells, a contribution to the, 

 526. 



Piccolomini (Comte Vincent) letter to Sir 

 J. F. W. Herschel, Bt.,on the geogra- 

 phical position of the Californias and of 

 the Mexican coasts of the Pacific, 

 596. 



Piria (R.) on the combinations of sali- 

 cyle, 210. 



Plants, germination and the growth of, 

 271. 



Pleiades, a catalogue of twenty-seven 

 stars of the, 150. 



PoggendorfF (Prof.) on galvanic circuits 

 composed of two fluids, and of two me- 

 tals not in contact, 485. 



Polychromatic acid, 154. 



Port Arthur, meteorological register kept 

 at, 600. 



Postage, new system of, 78. 



Potash, chlorate of, manufacture of, 237. 



Potassium, ferrocyanide of, on a new 

 compound of, with cyanide of mercury, 

 128; action of the air on salicide of, 

 217; iodide of, on a pseudomorphous 

 variety of, 222. 



Potter (R.) on Photometry in connexion 

 with physical optics, 16; letter from, to 

 Mr. R. Taylor, 220 ; on interferences, 

 as an experimenlum crucis as to the na- 

 ture of light, 380. 



Pratt (J. H.) on the temperature of the 

 sea and air, and other phaenomena, du- 

 ring a voyage to India, 176; table of 

 results on the temperature of the sea, 

 177. 



Problem of the knight's move at chess, on 

 the, 306, 498. 



Pseudomorphous variety of iodide of po- 

 tassium, 222. 



Pyrites, on the products of oxidized, 265 ; 

 natural products which originate from 

 the action of tlie atmo phere on iron, 265. 



Radicals, simple electro-positive, 4 ; sim- 

 ple electro-negative, 4; compound, 5; 

 on oxichlorides vvith compound, 7. 



Rays, chemical, on the permeability of va- 

 rious bodies to the, 1 38. 



Reade (Rev. J. B.) on single achromatic 

 eye pieces, and their superiority to the 

 double eye piece of Huyghens, 595. 



Refractions, astronomical, theory of 89, 

 434. 



Roberts (Martyn J.) on an anomalous 

 electric condition of iron, 142; results 

 arrived at, by battery of copper and 

 zinc, 143. 



Rocks near Killarney and Dublin, on the 



order of succession of the older strati- 

 fied, 163. 

 Roget (Dr.) on the problem of the 

 knight's move at chess, 306, 498. 



Roxburgh, on ashes which fell on board 

 the, 144, 



Royal Astronomical Society, proceedings 

 of the, 72, 144. 



Royal Institution, meetings at the, 338, 

 447. 



Royal Irish Academy, proceedings of the, 

 224. 



Royal Society, proceedings of the, 329, 

 526, 590. 



Runton, freshwater strata of, 362 ; shells 

 discovered at, 363 ; crag at, 365. 



Russia, Norway and Germany, on magne- 

 tic observations in, 598. 



Sabine (Major) on magnetic observations 

 in Germany, Norway, and Russia, 

 598. 



Salicic acid, 214, 



Salicide of potassium, action of the air on, 

 217. 



Salicides, metallic, 213. 



Salicin, decomposition of, by sulphuric 

 acid, 219; action of chlorine on, 219. 



Salicine, analysis of, 210; crystallized, 211 ; 

 anhydrous, 21 1. 



Salicyie, on the combinations of, 210; hy- 

 drurct of, 212; chloride of, 216; bro- 

 mide of, 216; combinations of, with 

 amidogene, 216. 



Schafhaeutl (Dr. C.) on the combinations 

 of carbon with silicon and iron and 

 other metals, forming the different spe- 

 cies of cast iron, steel, and malleable 

 iron, 44, 297,426,514, 570. 



Seheerer (Th.) on the decomposition of 

 the neutral sulphate of the peroxide of 

 iron by boiling its solution, 130; on the 

 natural products which originate from 

 the action of the atmosphere on iron 

 pyrites, 265 ; on two Norwegian cobalt 

 ores from the Skulteruder mine, 482, 



Schumacher (Prof), letter from, to Fran- 

 cis Baily, Esq., on the discovery of a 

 comet by M. Galle, 151. 



Scientific books, new, 79. 



Scientific Memoirs, answer to a memoir of 

 the late Prof. Nobili in the, 52. 



Sea and air, on the temperature of the, 

 during a voyage to India, 176. 



Secondary currents, conditions which in- 

 fluence the production of, 206. 



Ships of the British navy, effects of light- 

 ning on certain, 404. 



Siegen, analysis of iron from, 522. 



Selenium, on a compound of fluorine with, 

 194. 



Silicon and iron, on the combinations of 

 carbon with, 44, 297, 426. 



