Index, 



479 



B. 



Rainy, Mr. H. on the specific gravity of 



hydrogen gas, 135, 352. 

 Refraction, 69. 

 Reptiles and amphibia, Mr. Gray on their 



genera, 193. 

 Rhodium and gold, alloy of, M. Del Rio 



on, 251. 

 Ritchie, Mr. W. on a new photometer, 



463. 

 Roget, Dr. on an optical deception, 107. 

 Rose, M. H.his analysis of the seleniurets 



of the Eastern Hartz, 284 — on the 



compounds of antimony with chlorine 



and sulphur, 416. 



S. 



Saurians, the, on their circulating system, 



384. 

 Say, Mr. T. on caryocrinites and blastoi- 



dea, &c. 311. 

 Scanlan, Mr. on a compound of iodine 



and carbon, 14. 

 Sea-horse, 396. 

 Sedgwick, Prof, on diluvial formations, 



18. 

 Selenium in volcanic sulphur, 234. 

 Seleniurets of the Eastern Hartz, M. H. 



Rose on, 284. 

 Seleniuret of lead, 286. 

 m. : MINI. Stromeyer and 



Haussmann, on, 233. 



.- cobaltiferous, 287. 



with seleniuret of cop- 



per, 288, 289. 



with seleniuret of mer- 



cury, 290. 

 of silver, 



256. 



Shells, British, Mr. Gray on some newly 

 described, 387. 



Ships in the British navy, Mr. Major on 

 a digest of the plans of, 321. 



—— copper sheathing of, papers respect- 

 ing Sir H. Davy's method of protecting, 

 15,66,281. 



Silicium, 116. 



Silicated fluoric acid, 116. 



Silver, seleniuret of, 256. 



Siren lacertina, 1 52. 



Smithson, J. Esq. on a method of fixing 

 crayon colours, 236— on a sensible ba- 

 lance, 53. 



Snow storm, luminous, 154. 



Society, astronomical, proceedings of, 69, 

 466. 



■ geological, proceedings of, 149, 



229. 



' Linnean, 



148, 466. 



proceedings of, 67, 



Society, Medico-botinical, proceedings of, 



468. 

 ■ of Physicians, proceedings of, 



469. 



Royal, proceedings of, 465. 



Soda, acetate of, on its preparation, 113. 



carbono-phosphate of, 381. 



new salts of, Dr. Thomson, 435. 



Sodalite of Vesuvius, 384. 



Solar light, Dr. M'Keeveron its' influence 

 on combustion, 344, 



spots, 415. 



Sound, velocity of, account of experiments 

 on, by Dr. Moll and Dr. VanBeek, 268 

 — table of the results of experiments on, 

 by various philosophers, 281. 



South, J. Esq. corrections in right ascen- 

 sion of 37 principal stars of the Green- 

 wich catalogue, 38, 245. 



Sowerby, Mr. G. B. observations on his 

 paper on Orbicula and Crania, 243. 



Specific gravity of hydrogen gas, 135, 

 352. 



Stars, 37, of the Greenwich catalogue, 

 corrections in right ascension of them, 

 38, 245. 



Steam, high pressure, JMr. Prideaux, on 

 its advantages, 432. 



Steel, Mr. Tredgold's experiments on its 

 elasticity and strength, /j20. 



Stephens, JMr. E. B. on the means of as- 

 certaining the tanning powers of astrin»« 

 gents, 401. 



Stone, meteoric, fall of in North America, 

 186. 



Storm, luminous snow, 154. 



Stromeyer, M. his analysis of sulphato- 

 tri-carbonate of lead, 232 — of hydrate 

 of magnesia, 232 — or magnesite, 233 — ' 

 — of seleniuret of lead, 233 — his detec- 

 tion of selenium in volcaruc sulphur, 

 234. 



Sulphate of potash, Mr. Brooke on Dr. 

 Brewster's observations concerning its 

 crystalline forms, 330. 



soda, new, 435. 



— ^— — of zinc, Dr. Thomson on the 

 method of analyzing, 363. 



Sulphato-tri-carbonate of lead, 232. 



Sulphoprussic acid, 181. 



Sulphur, volcanic, contains selenium, 234. 



Sulphuret of boron, 129. 



Sulphuretted hydrogen and carbonic acid, 

 on their reciprocal action on the carbo- 

 nates, &c. St<J. 



Sumatran ape, 387. 



Table of chemical equivalents, 293, 469. 

 Tables, meteorological, 79, 159, 239, 

 319,399,473. 



