492 



INDEX. 



Roccella tinctoria, (xlvchil-weed) che- 

 mical examination of, 233, 337. 

 Roccelline, 233. 



Rokevvode (J. G.), notice of the late, 

 418. 



Ross (Capt. J. C), magnetic observa- 

 tions, 220. 



J magnetic-term observations 



taken on board H.M.S. Erebus and 

 Terror, 298. 



, magnetic-term observations 



taken at Kerguelen's Land, 293. 



, magnetic-term observations 



made at Van Diemen's Land, 298. 



, hourly magnetic observations 



taken at Kerguelen's Land, 293. 



, hourly magnetic observations 



taken at Van Diemen's Land, 298. 



meteorological observations 



taken on board H.M.S. Erebus and 

 Terror, 293, 303, 374, 380. 



notices of the Aurora Australis 



in Mar. 1841, 395. 



Rotatory motion, on, 66. 



Royal Medals, the grant of the, con- 

 tinued by Her Majesty Queen Vic- 

 toria, 69, 87. 



, alterations in the laws for the 



distribution of, 88. 



— , awarded to the Rev. William 



Whewell, 6, 24; to H. F. Talbot, 

 Esq., 101 ; to Prof. Thomas Graham, 

 102; to Sir J. F. W. Herschel, 255 ; 

 to Prof. Wheatstone, 255 ; to Ro- 

 bert Kane, M.D., 337; to Eaton 

 Hodgkinson, Esq., 338; to W. 

 Bowman, Esq., 422 ; to Prof. I)a- 

 niell, 422. 



Royal Observatory, Greenwich, on the 

 meteorological instruments at, 330. 



Rumford Medal, awarded to Professor 

 Forbes, 104 ; toMr. Fox Talbot, 422. 



Rutherford (W.), computation of the 

 ratio of the diameter of a circle to 

 its gircumference to 208 places of 

 decimals, 302. 



Sabine (Joseph), notice of the late,15. 



Sabine (Lieut.-Col.) on magnetical ob- 

 servations in Germany, Norway, 

 and Russia, 197. 



, contributions to terrestrial mag- 

 netism, 212, 221, 287, 369, 465, 

 468. 



, remarks on the meteorological 



observations made at Alten, 229. 

 Sagapenum, resin of, 241. 



Saint Helena, meteorological observa- 

 tions made at, 295. 



Salts, Prof. Graham's inquiries re- 

 specting the constitution of, 102. 



Salts of magnesia, zinc, copper, lime, 

 strontia, baryta, lead, silver, soda, 

 ammonia and potass, their action on 

 the blood, 285. 



Sandarach, resin of, 163. 



Sap, on the cause of the ascent and 

 continued motion of, 432. 



on the descent of, in plants, 449. 



Sarcolemna, or tunic of the primitive 

 fasciculus of voluntary muscle, 245. 



Saunders (G.), notice of the late, 178. 



Saurians, remains of, discovered in the 

 strata of Tilgate Forest, 290. 



Savart (F.), biographical notice of, 352. 



Scammony, resin of, 218. 



Schoenbein (Prof.) on the odour ac- 

 companying electricity, 226. 



Scilly Islands, shock of an earthquake 

 in the island of St. Mary's, 122. 



Sea's surface, laws of the rise and fall 

 of, during each tide, 242. 



Secondary compounds, electrolysis of, 

 153, 231. 



Seppings (Sir R.), notice of the late, 

 263. 



Shell, percussion, to explode at the 

 bottom of the sea, 248. 



Shells, microscopic examination of the 

 texture of, 435. 



, on the combinations of the com- 

 ponent elements of, 467. 



' , turbinated and discoid, geome- 

 trical forms of, 79. 



Shell-lac, specific inductive capacity 

 of, 40, 100. 



Ship's compass, on the deviation of, 

 in iron-built ships, 141. 



, iron-built, experiments for dis- 

 covering a correction for the devia- 

 tion of the compass in, 141, 



Shooting stars, account of those of 

 1095 and 1243, 210. 



Silica, on its solubility by steam, 232. 



Silver, Pcua, experiments on, 119. 



, the equivalent number of, 123. 



, on the reduction of, 447. 



Simla, magnetic and meteorological 

 observations made at, 362,371, 383. 



Singapore, tidal observations at, 311. 



— — , magnetic-term observations 

 made at the observatory at, 371. 



, graphic representations of the 



term-day observations, 371. 



